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Cabletron Systems EMM-E6 Ethernet User's Manual

1. Default Subnet Mask 255 255 255 0 Masks out Network ID octets allows all of final octet to be used for Host IDs pays o o o o Modified Subnet Mask 255 255 255 224 Masks first three bits of fourth octet allowing a portion of the Host ID to be used for Subnet identification This particular custom Subnet Mask allows the creation of six subnets each having no more than hirty hosts see Table 1 6 below for a maximum of 180 Host IDs YY Y 1RRRIBERIRER iS RRIIIREI 1 o e o oo Subnet Logi cal Shows how final five bits of original remain for Host IDs N N N N NIN NTN s s s u H H H Subnet Actual 195 191 21 87 Host number 23 on Subnet number 64 Subnet Hos 64 23 1 11 010 0 011 1 1 0 1 1 1 1 1 1 0 0 0 1 0 1 011 011 011 1 0 1 Figure 1 3 Subnet Masking If you decide to modify the default Subnet Mask in order to accommodate subnets within your network you must determine the number of subnets you desire and how many Host IDs will be available within each configured Subnet EMM E6 User s Guide 1 27 CHAPTER 1 INTRODUCTION Th
2. 3 13 3 8 INSTALLATION 3 16 3 9 CONNECTING TO THE 3 18 3 9 1 Connecting a Twisted Pair Segment to an EPIM T 3 19 3 9 2 Connecting an AUI Cable to an EPIM X 3 21 3 9 3 Connecting to an EPIM F1 F2 or EPIM F3 3 22 3 9 4 Connecting a Thin Net Segment to 3 25 3 9 5 Connecting an AUI Cable to an EPIM A 3 27 viii 6 User s Guide TABLE OF CONTENTS CHAPTER 4 ATTACHING A CONSOLE 4 1 CONFIGURING YOUR TERMINAL eee 4 1 4 2 CONFIGURING A CONSOLE 4 3 4 2 1 Connecting to a VT Series Terminal 4 4 4 2 2 Connecting to an IBM PC or Compatible 4 5 4 3 PINOUT DESCRIPTIONS esses 4 6 4 4 CONFIGURING A UPS 4 6 CHAPTER 5 ACCESSING LOCAL MANAGEMENT CHAPTER6 COMMUNITY NAMES 6 1 ACCESSING THE COMMUNITY NAME TABLE 6 1 6 2 COMMUNITY NAME TABLE SCREEN FIELDS 6 2 6 3 ESTABLISHING COMMUNITY NAMES 6 3 7 CONFIGURATION SCREEN 7 1 ACCESSING THE CONFIGURATION SCREEN 7 1 7 2 CONFIGURATION SCREEN FIELDS se 7 2 7 3 SETTING THE HOST 55 2
3. EMM E6 USER S GUIDE F ETHERNET CaBICTROTDl systems The Complete Networking Solution CABLETRON SYSTEMS PO Box 5005 Rochester NH 83866 5005 Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made The hardware firmware or software described in this manual is subject to change without notice IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES WHATSOEVER INCLUDING BUT NOT LIMITED TO LOST PROFITS ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED IN IT EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF KNOWN OR SHOULD HAVE KNOWN THE POSSIBILITY OF SUCH DAMAGES Copyright July 1995 by Cabletron Systems Inc P O Box 5005 Rochester NH 03866 5005 Rights Reserved Printed in the United States of America Part Number 9031515 July 1995 LANVIEW and SPECTRUM are registered trademarks and ESXMIM ESXMIM F2 EMM E6 EMME IRM MMAC TPMIM TPRMIM THN MIM CXRMIM FOMIM FORMIM TPXMIM TPT FOT F TMS 3 LANVIEWSECURE BRIM FPIM APIM and EPIM are trademarks of Cabletron Systems Inc Windows is a registered trademark of Microsoft Corp VT220 VT320 VT100 and DECNet are trademarks of Digital Eq
4. Office Locations File Server Workstation Client Workstation Figure 3 9 Installation Checkout EMM E6 User s Guide 3 17 CHAPTER 3 INSTALLATION 3 9 CONNECTING TO THE NETWORK This section gives procedures for connecting the EMM E6 to the network using the various EPIMs available When the EMM E6 is first powered up the EPIM 1 port acts as the bridge port and the EPIM 2 port is OFF Once you have successfully powered up your EMM E6 you can add network connections The procedure for connecting Ethernet segments to a hub varies depending on the media and ports you connect Refer to the following list and perform the procedure described in the subsection s that apply to your hub EPIM T 3 9 e EPIM X 3 9 2 e 2 3 9 3 e EPIM C 3 9 4 e EPIM A 3 9 5 3 18 EMM E6 User s Guide CONNECTING TO THE NETWORK 3 9 1 Connecting a Twisted Pair Segment to an EPIM T Before connecting a segment to the EPIM T check each end of the segment to determine wire cross over If the wires do not cross over use the switch on the EPIM T to internally cross over the RJ45 port Refer to Figure 3 10 to properly set the EPIM T cross over switch To establish link you must have an odd number of cross overs NOTE preferably one between IOBASE T devices of the same type i e from repeater to repeater or transceiver to transceiver Position X crossed over 1 5 NC 2 RX 6 TX
5. EMM E6 User s Guide 13 15 CHAPTER 13 MIB NAVIGATOR 13 3 4 Special Commands The following provides a brief description the proper format and an example applicable to each Special command done These commands enable you to exit from the MIB Navigator quit and return to the operating system exit Format done Example MIBNav gt done 13 16 EMM E6 User s Guide USING LANVIEW CHAPTER 14 TROUBLESHOOTING This chapter includes information for troubleshooting network and EMM E6 operational problems The following sections describe the EMM E6 s LANVIEW LEDs provide a troubleshooting checklist and explain how and when to reset the EMM E6 14 1 USING LANVIEW The EMM E6 uses the Cabletron Systems built in visual diagnostic and status monitoring system called LANVIEW With LANVIEW you can quickly scan the EMM E6 LEDs to observe network status or diagnose network problems EMM E6 RESET _ O cpu D C B A ss OOOO DOOD an e 4 a Figure 14 1 LANVIEW LEDs EMM E6 User s Guide 14 1 CHAPTER 14 TROUBLESHOOTING Table 14 1 LANVIEW LEDs Error Condition LED Color Description Recommended Action CPU Multicolor Flashing Green If OFF or Red the board has a indicates that the problem Green board is Red operating Press the reset switch on the properly EMM E6 front panel to re initialize
6. netstat The netstat provides a display of general network statistics for the managed device The netstat command must be used with one of the following two display options i Displays status and capability information for each interface r Displays routing information for each interface Format netstat i netstat r Example gt netstat i Example MIBNav gt netstat r ping The ping command generates an outbound ping request to check the status alive not alive of a device at a specified IP address Format ping lt IPADDRESS gt Example MIBNav gt ping 122 144 40 10 13 12 EMM E6 User s Guide MIB NAVIGATOR COMMAND SET OVERVIEW Built In Commands snmp The snmpbranch command enables you to query another branch SNMP device The command provides a display of objects that match the specified OBJECT ID If no match is made no object will display Format snmpbranch IPADDRESS COMMUNITY STRING lt OBJECT ID gt Example gt snmpbranch 2 4 8 1 public 1 3 6 2 1 1 snmpget The snmpget command enables you to query another SNMP device to obtain a value for a specified object This command requires the appropriate community string and object id Format snmpget lt IPADDRESS gt lt COMMUNITY NAME gt lt OBJECT ID gt Example MIBNav gt snmpget 2244 61 22 public 136121110 EMM E6 User s Guide 13 13 CHAPTER 13 MIB NAVIGATOR
7. APPENDIX B COMMONLY USED OIDs rptrPortSecurity LockStatus Description Defines the lock status for this particular port entry Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 9 1 1 3 Data Type Integer Values 1 unlock 2 lock Access Policy read write rptrPortSecurity LockAddA ddress Description Setting a value to this object adds a new entry to the rptrPortSecurityListTable When read this object displays an Octet String of size 6 with each octet containing a 0 This object provides an easy method to add or delete conceptual rows in the rptrPortSecurityListTable The returned value has little or no actual meaning Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 9 1 1 4 Data Type Octet String size 6 Access Policy read write rptrPortSecurity LockDelA ddress Description Setting a value to this object deletes a corresponding entry in the rptrPortSecurityListTable When read this object returns the last deleted source address An Octet String of size 0 is returned if no objects were deleted since last system reset Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 9 1 1 5 Data Type Octet String Access Policy read write B 4 EMM E6 User s Guide PORT GROUP SECURITY rptrPortSecurityDisableOnViolation Description Designates whether port is disabled if source address is violated A source address violation occurs when an address is detected which is not in the source address list for this port If this port is di
8. Built In Commands snmpset The snmpset command enables you to set the value of an object in other SNMP devices This command requires the appropriate community string and OID When defining a new leaf the set command prompts you for a value type Possible value types are as follows i nteger number c ounter number g auge number ime ticks number p aque value value with quotation marks s tring value value with quotation marks number number number a ddress IP address dotted decimal physical address hex string n ull no type Format snmpset lt IPADDRESS gt COMMUNIT Y NAME gt lt OBJECT ID gt lt VALUE gt Example MIBNav gt snmpset 122 44 1 2 public snmptree The snmptree command provides a display of all objects in the device and their corresponding values Format snmptree lt IPADDRESS gt lt COMMUNITY NAME gt 13 14 Example MIBNav gt snmptree 122 144 89 10 public EMM E6 User s Guide MIB NAVIGATOR COMMAND SET OVERVIEW Built In Commands traceroute The traceroute command generates a TRACEROUTE request to a specified IP address and provides a display of all next hop routers in the path to the device If the device is not reached the command displays all next hop routers to the point of failure Format traceroute lt IPADDRESS gt Example MIBNav gt traceroute 122 144 11 52
9. that sets forth your rights and obligations with respect to the Cabletron software program the Program contained in this package The Program may be contained in firmware chips or other media BY UTILIZING THE ENCLOSED PRODUCT YOU ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT WHICH INCLUDES THE LICENSE AND THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT PROMPTLY RETURN THE UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND EMM E6 User s Guide iii CABLETRON SOFTWARE PROGRAM LICENSE LICENSE You have the right to use only the one 1 copy of the Program provided in this package subject to the terms and conditions of this License Agreement You may not copy reproduce or transmit any part of the Program except as permitted by the Copyright Act of the United States or as authorized in writing by Cabletron OTHER RESTRICTIONS You may not reverse engineer decompile or disassemble the Program APPLICABLE LAW This License Agreement shall be interpreted and governed under the laws and in the state and federal courts of New Hampshire You accept the personal jurisdiction and venue of the New Hampshire courts BELLCORE TESTING INFORMATION This product has been tested by Bellcore and found to comply with the following Bellcore Standards l iv TR NWT 000063 Network Equipment Building System NEBS Generic Equipment
10. 1 15 1 5 titre et etri 1 16 1 6 BRIBGES 1 17 1 6 1 Filtering and 1 18 1 6 2 Spanning Tree 1 19 1 7 LOCAL MANAGEMENT 1 20 1 8 COMMUNITY NAMES sse 1 21 1 9 SNMP 7 Ale aia i atem uds 1 21 1 22 1 10 REVIEW OF ADDRESSING ss 1 22 1 10 1 4 1 22 1 10 2 IPFAdareSsseS et eret 1 23 1 10 3 Identifying IP Address Classes 1 25 1 10 4 Subnet 5 1 25 1 10 5 Subnet Masks esses 1 26 1 10 6 Operation of the Subnet Mask 1 30 1 10 7 Default 1 30 1 10 8 Addressing Example 1 31 LANVIEW LEDs AND RESET 1 33 LANVIEWSEGURE ihe rat eed 1 33 GETTING HELP 2 eec i Mete 1 35 REEATED MANUALES 2 rtu titi 1 35 EMM E6 User s Guide vii TABLE 5 CHAPTER 2 REQUIREMENTS CONFIGURATIONS 2 1 NETWORK REQUIREMENTS seen
11. 1 1 USING THIS MANUAL Read through this manual completely to familiarize yourself with its content and to gain an understanding of the features and capabilities of the EMM E6 and its Local Management or LM functions A general working knowledge of Ethernet and IEEE 802 3 type data communications networks and their physical layer components is helpful when installing the EMM E6 module and when using LM Chapter 1 Introduction outlines the contents of this manual briefly describes the EMM E6 s features provides a brief review of IP addressing and concludes with a list of related manuals Chapter 2 Requirements Configurations explains the network requirements to consider before installing the EMM E6 This chapter also includes sample configurations to demonstrate various applications for the EMM E6 Chapter 3 Installation provides instructions guidelines on how to install the EMM E6 into an set the EMM E6 mode switches and connect segments to your device using optional EPIMs This chapter also explains how to install optional Single In line Memory Modules EPIMs and locate Bridge Router Interface Module BRIM connectors Chapter 4 Attaching a Console describes how to attach a Local Management console to the EMM E6 This chapter provides the setup and configuration requirements for the console the console cable and any cable connections EMM E6 User s Guide 1 1 CHAPTER 1 INTRODUCTION Chapter 5 Acces
12. 5 ctDLInitiateColdBoot 1 3 6 1 4 1 52 4 1 5 8 1 3 0 integer 1 15 10 EMM E6 User s Guide APPENDIX EMM E6 SPECIFICATIONS This appendix provides the operating specifications for the Cabletron Systems EMM E6 Cabletron Systems reserves the right to change these specifications at any time without notice A 1 BRIDGING FUNCTIONALITY FLASH Memory Shared Sonic Memory Internal Processor Read Only Memory Non Volatile RAM Ethernet Controller CPU Memory Packet Filter Rate max viewed per second Packet Forward Rate max forwarded per second Forwarding Latency Ageing Time Filtering Database EMM E6 User s Guide 2 MB expandable to 14 MB 4 MB expandable to 12 MB Intel 80960 128K 128K 4 DP83932 Controllers 8 MB expandable to 12MB 30 000 packets 22 000 packets 91 us min 5 minutes default 8 191 max APPENDIX 6 SPECIFICATIONS 2 REPEATER FUNCTIONALITY Delay Times port x in to port x out Start of Packet 1 450 ns max Collision to JAM 1 550 ns max Preamble Input Minimum of 40 bits to a max of 64 bits required Output 64 bits min last 2 bits 1 1 JAM Output If a collision occurs on one of the segments pattern of 1 0 is sent to the other segments Minimum Packet Repeated 96 bits including preamble Packet fragments are extended using the JAM 1 0 data pattern FAULT Protection Each segment will disconnect it
13. Allows full management privileges e Read Write Allows editing of device configuration parameters not including changing Community Names e Read Only Allows reading of device parameters not including Community names e Basic Read Allows reading low level device data 1 9 SNMP SNMP Simple Network Management Protocol is a protocol within the Transmission Control Protocol Internet Protocol TCP IP protocol suite Network applications such as Local Management and MIB Navigator use SNMP to manage device configurations and monitor operating conditions SNMP protocol defines methods for SETs and TRAPs either remotely from any point along the TCP IP network or locally This allows for control of the device from any point along the network SNMP tools use the MIBs located on the device to be managed to access information GET change device parameters SET and to notify previously selected users that an event has occurred TRAP EMM E6 User s Guide 1 21 CHAPTER 1 INTRODUCTION 1 9 1 MIBs The Management Information Bases MIBs are a database resident on the EMM E6 Objects in the information base are uniquely identified by administratively assigned identifiers called object identifiers or OIDs and can be viewed retrieved or changed using an SNMP packet exchange over the network 1 10 REVIEW OF ADDRESSING For network devices to recognize one another unique identifiers referred to as addresses
14. Description This object allows the network manager to select which Spanning Tree Protocol will be operational on the bridge The value decLb100 2 indicates the DEC LANBridge 100 Spanning Tree Protocol The value ieee8021d 3 indicates the IEEE 802 14 Spanning Tree Protocol The value 1 indicates no Spanning Tree Protocol is operational Object Identifier 1 3 6 1 4 1 52 4 1 2 3 2 1 Data Type Integer Values 1 2 decLb100 3 ieee8021 Access Policy read write EMM E6 User s Guide B 1 APPENDIX B COMMONLY USED OIDs B 2 CONFIGURING ARP REQUEST PACKETS The EMM E6 s SNMP Tools Screen allows you to generate an Address Resolution Protocol ARP Request packet utilizing specific framing through local management An ARP Request is used to send an SNMP Trap to a destination node that has not yet made or established contact with the EMM E6 This situation may occur when the destination node in question has been moved from one port or channel interface of the EMM E6 to another location and has not yet transmitted information which would notify the EMM E6 of its network location The generation of ARP Request packets in such a situation would allow the EMM E6 to locate the reconfigured station without waiting for that station to transmit rptrScrAddrMgmtHashType Description Forces the EMM E6 to utilize a specific framing type for any ARP Request packet The values entered determine the framing type utilized
15. EPIM F1 F2 EPIM F1 F Figure A 3 EPIM F1 and EPIM F2 The transmitter power and receive sensitivity levels below represent Peak Power Levels after optical overshoot You must use a Peak Power Meter to correctly compare the above values to those you measure on any particular port If you measure Power Levels with an Average Power Meter you must subtract 3 dBm from the measurement to correctly compare measured values to the values below e g 29 5 dBm peak 32 5 dBm average Table A 1 EPIM F1 F2 Statistics Receive Sensitivity 29 5 dBm Max Receive Power 8 2 dBm Transmitter Power Into 50 125 um fiber 13 0 dBm 62 5 125 um fiber 10 0 dBm 100 140 um fiber 7 0 dBm Bit Error Rate Better than 10 A 6 EMM E6 User s Guide 10 SINGLE MODE FIBER OPTIC PORT Internal Transceiver Cabletron Systems FOT F3 Fiber Optic Transceiver Type ST fiber optic ports Figure 4 Figure A 4 EPIM F3 Transmitter power is inversely proportional to temperature rise Use the Output Power Coefficient to calculate increased or decreased power output for your operating environment For example typical power output at 25C equals 16 4 dBm For a 4C temperature increase multiply the typical coefficient 0 15 dBm by four and add the result to the typical output power 4 x 0 15 dBm 16 4 dBm 17 0 dBm EMM E6 User s Guide 7 APPENDIX 6 SPECIFICATIONS Table A 2 E
16. Ensure that the external transceiver to which you connect the NOTE EPIM A does not have the Signal Quality Error SQE or heartbeat test function enabled The does not operate if the transceiver has the SQE test function enabled Refer to the applicable transceiver manual for additional information To connect an EPIM A to an external network segment 1 Check that the PWR LED on the EPIM A is on If the PWR LED is not on contact Cabletron Systems Technical Support 2 Attach an external transceiver to the network segment intended for AUI port connection For additional information refer to the applicable transceiver manual 3 Attach an AUI cable no longer than 50 meters in length to the transceiver you connected to the network in step 2 4 Connectthe AUI cable to the AUI port located on the EPIM A See Figure 3 15 Figure 3 15 The EPIM A EMM E6 User s Guide 3 27 CHAPTER 3 INSTALLATION 5 Lock the AUI connector into place using the connector slide latch 6 Ifthe transceiver PWR LED is off with the AUI cable connected a Check the AUI connections for proper pinouts Appendix A lists the pinouts for the transceiver connection b Check the cable for continuity c Reconnect the AUI cable to the and the device If the transceiver PWR LED remains off contact Cabletron Systems Technical Support 3 28 EMM E6 User s Guide 4 CONSOLE This chapt
17. Screen Improper console Refer to Appendix A for proper cable UPS cable console UPS port pinouts pinouts Cannot Improper Community Refer to Chapter 6 for Community contact the Names Table Names Table setup and Chapter 7 EMM E6 for IP address assignment from in band EMM E6 does not procedures management have an IP address Check link to device No link to device Check Static Database Packets are being bridged by a permanent entry EMM E6 User s Guide 14 5 CHAPTER 14 TROUBLESHOOTING Table 14 2 Troubleshooting Checklist Continued 2 Recommended Problem Possible Causes Action A porton a The port is either off or Enable the port via local or remote MIM segmented management managed by the EMM E6 Port cable is Try connecting the port with a cannot defective different cable access the network while other ports on the same MIM are able to access User Switch 7 has been See Chapter 3 for information on parameters toggled and user the NVRAM switch setting IP address entered parameters Device and have been reset to Module factory default If NVRAM is defective call name etc Cabletron Technical Support are lost NVRAM may be when device defective is powered down No power to EPIM is defective Replace EPIM an external transceiver connected to AUI cable is defective Replace AUI cable an EPIM A High number External transceiver Disable SQE of collisions has SQE enabled
18. When using the whoami command one of these four access levels will display Basic Read Read Only Read Write and Super User Format whoami Example MIBNav gt whoami 13 10 EMM E6 User s Guide MIB NAVIGATOR COMMAND SET OVERVIEW 13 3 3 Built In Commands The following provides a brief description the proper format and an example of each Built In command arp The arp command provides access to the ARP Address Resolution Protocol cache enabling you to view cache data delete entries or add a static route Superuser access is required to delete an entry or add a static route Each arp cache entry lists the network interface that the device is connected to the device s network adaress or IP address the device s physical address or MAC address and the media type of connection to the device The device s media connection occurs in one of the following ways 1 Other 2 Invalid entry cannot ping device timed out etc 3 Dynamic route entry 4 Static route entry not subject to change Format arp a to view cache data arp d INTERFACENUM IPADDRESS deletes IP address entry arp s lt INTERFACENUM gt lt IPADDRESS gt MACADDR adds a static entry Example MIBNav gt arp a Example gt d 1 122 144 52 68 Example MIBNav gt arp s 1 22 44 2 3 00 00 0e 03 1d 3c EMM E6 User s Guide 13 11 CHAPTER 13 MIB NAVIGATOR Built In Commands
19. are required The following sections are intended for review and do not represent a comprehensive description of network addressing This section begins by discussing the two types of addressing used in TCP IP networks Internet Protocol IP addresses and Media Access Control MAC addresses These descriptions are followed by an overview of the process of configuring addresses in a network including examples of network Classes and the creation of subnets within networks 1 10 1 MAC Addresses The MAC address is a unique 48 bit binary number associated with a specific physical connection to a network which is capable of generating packets Examples of devices with MAC addresses include SNMP agents and DNI cards MAC addresses are divided into 6 octets and represented in hexadecimal form such as the following 00 00 1D 00 26 FB MAC addresses are administered by the IEEE and are generally assigned at the time of manufacture and cannot be changed The first three octets uniquely identify the manufacturer Cabletron devices MAC addresses all start with 00 00 1D 1 22 EMM E6 User s Guide REVIEW OF ADDRESSING As MAC addresses are often used to perform management and control functions for networking hardware it is important to be able to identify a MAC address when it is requested or returned by network management Since most MAC addresses are set at manufacture and cannot be altered by users this manual does not examine MA
20. detected ona light indicates an inordinate segment When the LAN is operating properly occasional flashing is normal number of collisions Ensure that the SQE test is disabled for any transceiver connected to the EMM E6 s external channels D E or F Check cabling for data loops or defective cables EMM E6 User s Guide 14 3 CHAPTER 14 TROUBLESHOOTING 14 2 TROUBLESHOOTING CHECKLIST If your EMM E6 is not operating properly the following checklist describes some of the problems that may occur with the EMM E6 installed in an possible causes for the problem and suggestions for resolving the problem 14 4 EMM E6 User s Guide TROUBLESHOOTING CHECKLIST Table 14 2 Troubleshooting Checklist Problem Possible Causes Hacommended Action No LEDs on Loss of Power to the Check the proper installation of the MMAC MMAC power supply module and its access to a live outlet EMM E6 not properly installed Check that the MMAC has adequate power Some configurations especially those including FDDI modules require that more than one power supply be installed in the MMAC Check to see that the power supply LEDs are green Reset EMM E6 by removing it from chassis and reinserting according to directions in Chapter 3 Ensure that all fasteners are tightened No Local Terminal setup is not Refer to Chapter 4 for proper setup Management correct procedures Password
21. string ASCII integer Enter the path to the image file 1 Default setting normal operation 2 forceDownLoad The new image downloads to Flash memory The EMM E6 does not use the new image until you press the Reset button 3 forceDownLoad Reset The new image downloads to Flash memory The EMM E6 automatically resets upon completion of the download 4 ctDLOperStatus This OID monitors the progress of the Runtime Download 1 3 6 4 1 52 4 1 5 8 1 17 0 Integer 2 Indicates that a TFTP download request has been received but has not yet been activated 3 Indicates normal operation The download started and finished normally and no reset was specified or a download has not been started 4 Indicates that a download is in progress 5 Indicates that a download was started but has terminated due to an error EMM E6 User s Guide 15 9 CHAPTER 15 IMAGE FILE DOWNLOAD Table 15 2 Runtime Download Procedure Continued Step OID Name OID Number Data SNMP OID Data Type NOTE If you selected forceDownLoadReset at Step 3 then DO NOT CONTINUE you have completed all necessary settings NOTE If you selected forceDownLoad at Step 3 then you can reset the EMM E6 at a later time You can reset the EMM E6 remotely using the ctDLInitiateColdBoot OID described at Step 5 or manually using the Reset Button or Cycle Power
22. 1 26 Subnet address 1 25 Subnet Mask 1 26 Modifying 7 5 Operation 1 30 Super user 1 21 6 2 Default password 5 2 Index iv T Technical Support 1 35 Telnet 13 2 Terminals configuration 4 1 THN MIM 3 4 TPRMIM 2 7 TPXMIM 2 8 traceroute 13 15 Transceivers 2 6 Trap 1 21 Trap Table configuring 8 2 tree 13 9 Troubleshooting 14 1 U Unlocking Ports 7 9 Unpacking 3 2 Update Frequency 11 4 UPS support 7 8 W whoami 13 10 EMM E6 User s Guide EMM E6 QUICK REFERENCE CARD LANVIEW LEDs BRIM A100 DESCRIPTION Flashing Green Board Operating CPU Properly Red CPU error condition STBY Amber indicates port or interface A B C D placed in standby state RCV to EMM E6 interface A B C D Amber indicates segment receiving traffic Green indicates valid link from station Green indicates segment is XMT transmitting traffic A B C D due to spanning tree operation Flashing red indicates port in standby CLN Red indicates collision detected on LED is normal ABCD segment Occasional activation of CLN SWITCH SETTINGS Switch Function 1 Cabletron Systems Use Only Must be in OFF position 2 Cabletron Systems Use Only Must be in OFF position 3 Cabletron Systems Use Only Must be in OFF position 4 MIMREV Should be OFF unless s with part numbers below 9000043 05 are located in the M
23. 7 2 The EMM E6 will not allow Local Management to configure the Default Interface to utilize an unsubscribed interface For example To select Interface 5 as the Default Interface a BRIM module must first be configured to the E channel of the EMM E6 Press the Return key If the EMM E6 accepts your entry as a valid Default Interface it displays Previous Default Interface Marked Invalid at the top of the screen Use the arrow keys to highlight the Default Gateway field Enter the gateway s IP address in this field The format for this entry is XXX XXX XXX XXX with values for XXX ranging from 0 to 254 Press the Return key If the EMM E6 accepts your entry as a valid Default Interface it displays Previous Default Interface Marked Invalid at the top of the screen You have now established a Default Gateway and Default Interface for your EMM E6 EMM E6 User s Guide 7 7 CHAPTER 7 CONFIGURATION SCREEN 7 6 CONNECTING DISCONNECTING A UPS The EMM E6 provides the option of connecting to an Uninterruptible Power Supply UPS using Local Management To enable the UPS connection using EMM E6 LM 1 Use the arrow keys to highlight the COM 1 Application field 2 Press the Return key until UPS appears in the field This field toggles between OFFLINE which is the default value UPS and SLIP 3 Use the arrow keys to highlight the COM 1 Baud Rate field 4 Press the Return key until 2400 Conne
24. 7 4 7 4 MODIFYING A SUBNET MASK e 7 5 7 5 SETTING DEFAULT GATEWAY AND INTERFACE 7 6 7 6 CONNECTING DISCONNECTING A UPS 7 8 7 7 UNLOCKING 7 9 7 8 5 tete eel te 7 9 8 TRAP TABLE SCREEN 8 1 ACCESSING THE TRAP TABLE SCREEN 8 1 8 2 TRAP TABLE SCREEN FIELDS eee 8 2 8 3 CONFIGURING THE TRAP 8 2 CHAPTER9 SNMPTOOLS SCREEN 9 1 ACCESSING THE SNMP TOOLS SCREEN 9 1 9 2 SNMP TOOLS SCREEN FIELDS 9 2 9 3 THE SECURITY ACCESS LEVEL eee 9 3 9 4 GETTING AND SETTING OIDS 9 4 9 5 SCROLLING THROUGH MIB 9 6 EMM E6 User s Guide ix TABLE OF CONTENTS CHAPTER 10 ROUTER SETUP SCREEN CHAPTER 11 DEVICE STATISTICS SCREEN DEVICE STATISTICS u itr it ay ca 11 2 DEVICE STATISTICS SCREEN COMMANDS 11 3 11 2 1 Selecting an Update Frequency 11 4 11 2 2 Selecting a Network Slot Port 11 5 1123 Enabling Ports init 11 5 11 2 4 Disabling Ports sese 11 6 11 3 EXITING THE DEVICE STATISTICS SCREEN 11 6 CHAPTER 12 COMMAND LINE INTERFACE SCREEN C
25. E6 is for configuring three separate networks within one MMAC This provides you with the advantages of having three separate networks in one wiring closet with full bridging and SNMP management for each network Figure 2 2 illustrates an example of the three network configuration kep FORNM 22 2 Ken me oM O Channel E 8 8 8 p Channel F gBBl 3 l ilss B B e e eo p Channel D 6 B 5 5 3 53 RB 529 S 8 8 0 0 0 0 0 Channel Channel Channel C 1 1 2 Figure 2 2 Single MMAC FNB Configuration 2 5 2 EMM E6 as a Multiport Router An EMM E6 routing image allows you to set up the module as a multi port router For information on how to upgrade the EMM E6 to perform routing functions and how to configure the EMM E6 as a multi port router refer to Cabletron Systems Router Services Manual or contact Cabletron Systems Technical Support 2 10 EMM E6 User s Guide SAMPLE NETWORK CONFIGURATIONS 2 5 3 Adding Users to a Separate Segment The example in Figure 2 3 compares two methods of connecting 48 additional users to a network Single Channaliulmictianne Mul
26. Emulation package to connect to Local Management functions EMM E6 QUICK REFERENCE CARD Interpret Columns 80 Columns Controls Controls Autowrap No Autowrap Scroll Jump Scroll Text Cursor Cursor Cursor Style Underline Mode VT300 7 Bit ID Number 1320 or Cursor Keys Normal VT100 Transmit 9600 Receive 9600 XOFF XOFF at 64 Bits 8 Bits Parity No Parity Stop Bit 1 Stop Bit NoLocal Auto No Auto Local Beno Echo Port DEC 423 Answerback Answerback Typewriter Warning Keys Keys Margin Bell Margin Bell Bell Warning Bell
27. IP address will be used for the sending and receiving of SNMP data and should be configured for the interface with a connection to the network management station If the network management station is located on a different network or subnet the Default Interface and Default Gateway must be properly configured to allow the proper functioning of SNMP management 7 2 EMM E6 User s Guide CONFIGURATION SCREEN FIELDS SubNET Mask Displays the Subnet Mask for each of the six EMM E6 channels in dotted decimal notation MAC Address Displays the physical address of each bridge interface Default Interface Displays the default interface number for the EMM E6 default gateway This field defaults to NONE Default Gateway Displays the default gateway for the EMM E6 You cannot use this field until you enter an appropriate value for the Default Interface COM 1 Application Displays a port application setting of OFFLINE UPS or SLIP COM 2 Application Displays a port application setting of CONSOLE Baud Rate Displays the Baud Rate setting of the device attached to the EMM E6 through that COM port The setting for COM 1 is 2400 or N A the setting for COM 2 is 9600 Port LOCK Override This command overrides the port locking security feature and unlocks all ports in the MMAC containing the EMM E6 Port ENABLE Override This command overrides the Port Disable feature and enables all ports in the MMAC containing the EMM E6 EMM E6 U
28. Per Subnet 192 0 11000000 00000000 64 and 192 16 382 224 0 11100000 00000000 32 64 132 8 190 240 0 11110000 00000000 i 1052 4 094 increments of 16 248 0 11111000 00000000 85202 2 046 increments of 8 252 0 11111100 00000000 55 5 1 022 increments of 4 254 0 11111110 00000000 510 2 255 0 11111111 00000000 1 254 254 0 255 128 255 128 11111111 10000000 1 255 0 126 0 254 192 0 255 128 255 192 11111111 11000000 0 255 64 62 1 255 0 0 255 32 64 96 128 160 192 224 255 224 11111111 11100000 0 254 224 30 1 254 0 0 254 240 255 240 11111111 11110000 deno 10240 14 increments of 16 1 255 0 0 255 8 240 255 248 11111111 11111000 increments of 8 6 0 254 248 0 255 4 248 255 252 11111111 11111100 increments of 4 2 0 254 252 EMM E6 User s Guide 1 29 CHAPTER 1 INTRODUCTION 1 10 6 Operation of the Subnet Mask The Subnet Mask defines how your EMM E6 treats SNMP Trap IP destination addresses in its Trap table see Chapter 7 Trap Table Screen for additional information on traps When using the Subnet Mask the EMM E6 logically determines one of two possible locations either on or not on its own subnet for each Trap IP destination address in its trap table If the address is on its own subnet the EMM E6 transmits directly to the workstation with that address If the address is not on its subnet the EMM E6 transmits to the workstation with that address com
29. Requirements GR 1089 CORE EMC and Electrical Safety Generic Criteria for Network Telecommunications Equipment EMM E6 User s Guide EXCLUSION WARRANTY AND DISCLAIMER OF LIABILITY 1 EXCLUSION OF WARRANTY Except as may be specifically provided by Cabletron in writing Cabletron makes no warranty expressed or implied concerning the Program including Its documentation and media CABLETRON DISCLAIMS ALL WARRANTIES OTHER THAN THOSE SUPPLIED TO YOU BY CABLETRON IN WRITING EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THE PROGRAM THE ACCOMPANYING WRITTEN MATERIALS AND ANY ACCOMPANYING HARDWARE 2 NOLIABILITY FOR CONSEQUENTIAL DAMAGES IN NO EVENT SHALL CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BUSINESS PROFITS BUSINESS INTERRUPTION LOSS OF BUSINESS INFORMATION SPECIAL INCIDENTAL CONSEQUENTIAL OR RELIANCE DAMAGES OR OTHER LOSS ARISING OUT OF THE USE OR INABILITY TO USE THIS CABLETRON PRODUCT EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES OR ON THE DURATION OR LIMITATION OF IMPLIED WARRANTEES IN SOME INSTANCES THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU EMM E6 Use
30. and C as well as serving as the network management segment for the hierarchy The individual protocol segments are filtered by the EMM E6 bridge component so that the only traffic on segment D is minimal inter channel communication 1 mail Otherwise only network management data is on segment D out of band of the traffic on channels A B and C EMM E6 User s Guide 2 13 CHAPTER 2 REQUIREMENTS CONFIGURATIONS 2 5 5 The EMM E6 and BRIMs The example in Figure 2 5 illustrates just one possible EMM E6 and BRIM configuration The EMM E6 BRIM combination provides various connection possibilities depending on the BRIM s you use Refer to individual BRIM manuals and or Cabletron Systems Router Services documentation to better understand the capabilities of each device FDDI Backbone 19 0 0 0 0 0 0 Redundant Connectivity Channel A Lj Channel B O Channel C O Channel D Ethernet Backbone Figure 2 5 The EMM E6 and BRIMs 2 14 EMM E6 User s Guide 3 INSTALLATION This chapter contains instructions for unpacking and inventorying the contents of the EMM E6 carton locatin
31. appears 3 Enter the OID only the suffix is necessary 4 Press Return key The initial OID details including its size data type and data value appear 5 Highlight STEP using the arrow keys 6 Press the Return key to page through the MIB to the next OID 9 8 EMM E6 User s Guide 10 ROUTER SETUP SCREEN This chapter shows the Router Setup Screen Figure 10 1 below Using this screen the user can select the protocol to be used by any Routing Services previously installed in the EMM E6 The user should use the Routing Services Manual to make the correct selections from the Router Setup Screen The EMM E6 User s Guide does not cover routing and all data on this window will be found in the Routing Services Manuals EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 SNMP TOOLS INTEGRATED ROUTER X XX XX ROUTER SETUP DECnet INITIALIZE RETURN Figure 10 1 Router Setup Screen EMM E6 User s Guide 10 1 11 DEVICE STATISTICS SCREEN This chapter describes the features of the Device Statistics screen Using this screen you can view error collision and traffic statistics for the entire network a selected slot or a selected port This screen also provides the option of enabling and disabling ports To access the Statistics screen 1 Fromthe Features Selection screen use the arrow keys to highlight the Device Statistics option 2 Press the Return
32. cabling The RJ45 connector resembles the modern home telephone connector RJ11 Repeating Media Interface Module A term used to indicate a family of Cabletron Ethernet Media Interface Modules See MIM which are capable of performing their own repeater functions Remote MONitoring RMON is a network management standard which provides more detailed network information and status reporting than SNMP A router is a device which connects two or more different network segments but allows information to flow between then when necessary The router unlike a bridge examines the data contained in every packet it receives for more detailed information Based on this information the router decides wether to block the packet from the rest of the network or transmit it and will attempt to send the packet by the most efficient path through the network Shared Dynamic Random Access Memory EMM E6 User s Guide GL 11 Segment to SQE Segment Server SIMM Single Mode SMA SNMP Spanning Tree SQE GL 12 A portion of a network which is separated from other networks A segment may be one portion of a bridged switched or routed network Segments must be capable of operating as their own networks without requiring the services of other portions of the network A workstation or host device that performs services for other devices clients on the network Single In line Memory Module A collection of Random Access Memory
33. exit from the MIB Navigator The commands are as follows done quit exit 13 3 1 Conventions For MIB Navigator Commands The following conventions are used for denoting commands Information keyed by the user is shown in this helvetica font e Command arguments are indicated by two types of brackets required arguments are enclosed by optional arguments are enclosed by lt gt MIB Navigator command conventions are as follows EMM E6 User s Guide 13 3 CHAPTER 13 MIB NAVIGATOR e To abort the output or interrupt a process the escape character is C where equals the Control key e slash proceeding an OID issues that command from the root directory regardless of where you are in the MIB If no slash precedes the OID the command issues from your current MIB location e Dot notation 1 1 1 1 is equivalent to slash notation 1 1 1 1 Use slash notation with the navigational commands and the dot notation with the built in commands that are using SNMP to access and manage network devices 13 3 2 Navigation Commands The following provides a brief description the proper format and an example of each Navigation command branch The branch command displays all of the leaves in the MIB tree below a specified path The information displayed includes the path name the object ASCII name the type of object i e integer counter time tick etc and the current value Format branch PATH Exa
34. for the ARP packet Please note that any changes to the framing type to be utilized for ARP requests will take effect after the next soft reset of the EMM E6 Object Identifier 1 3 6 1 4 1 52 4 2 2 2 3 1 2 2 2 1 1 1 8 1 Data Type Integer Values 2 Ethernet Framing 3 802 32802 2 w SNAP Header Access Policy read write B 2 EMM E6 User s Guide PORT GROUP SECURITY B 3 PORT GROUP SECURITY The next seven OIDs are used for port group security features rptrSrcAddrMgmtPortLock Description Setting this object to lock activates the network port security lock Setting a value of portMisMatch 3 is invalid A read of PortMisMatch means that the lock status between the port group port and repeater levels do not agree Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 1 5 3 2 Data Type Integer Values 1 unlock 2 lock 3 portMisMatch Access Policy read write rptrPortGrpSrcAddrLock Description Allows the setting of the lock status for this port group Unlock 1 unlocks the source address lock for this group Lock 2 locks the source address for this group Setting a value of portMisMatch 3 for this value is invalid A read of PortMisMatch 3 means that the lock status for the ports within the port group does not match the lock status for the port group Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 2 6 1 2 Data Type Integer Values 1 unlock 2 lock 3 portMisMatch Access policy read write EMM E6 User s Guide B 3
35. microprocessors which are placed on a single replaceable printed circuit board These SIMMs may be added to some devices to expand the capacity of certain types of memory A type of fiber optics in which light travels in one predefined mode or wavelength Signals in single mode fiber optics are typically driven by lasers The use of lasers and the transmission characteristics of single mode fiber optics allow the media to cover greater distances than multimode fiber optics Sub Miniature Assembly A modular connector and port system used in multimode fiber optic cabling The SMA connector is threaded and is screwed into an SMA port Simple Network Management Protocol SNMP is a standardized set of network monitoring tools See also RMON A mathematical comparison and decision algorithm performed by Ethernet bridges at power up Spanning tree detects the presence of data loops and allows the bridges to selectively activate some ports while others remain in a standby condition avoiding the data loops and providing redundant paths in the event of bridge failures Signal Quality Error A self monitoring test performed by some Ethernet equipment which examines the status of the device s connection to the network at arbitrary and predefined intervals EMM E6 User s Guide ST Station STP Straight Through Subnet Subnet Mask Switch TCP Terminal Throughput ST to Throughput Straight Tip A modular connector
36. object The command is valid only for leaf entries in the current MIB tree or for managed objects in the MIB Format get lt OBJECTID gt 13 6 Example MIBNav get 1 3 6 1 2 1 1 1 EMM E6 User s Guide MIB NAVIGATOR COMMAND SET OVERVIEW Navigation Commands cont d help The help command provides a list of available MIB Navigator commands The command also provides help for individual MIB Navigator commands Format help general help help lt specific help mib2 Example MIBNav gt help su The mib2 command enables you to change directories directly to MIB II 1 3 6 1 2 1 without keying in the entire path Format mib2 next Example MIBNav mib2 The next command enables you to determine the next leaf in a specified path within the managed device s MIB This command operates much like the SNMP GETNEXT operator Format next PATH Example MIBNav gt next 1 3 6 1 2 1 EMM E6 User s Guide 13 7 CHAPTER 13 MIB NAVIGATOR Navigation Commands cont d pwd The pwd command displays the full path name for the directory in which you are currently working Format pwd Example MIBNav gt pwd set The set command enables you to set the value of a managed object This command is valid only for leaf entries in the current MIB tree or for managed objects in the MIB If a leaf does not exist for the given path you will be
37. only four using the RIC repeater offers a significant advantage By using cascading RIC MIMs it is possible to construct a much larger network than you could with stand alone repeaters Channels and C traffic travels through RIC MIMs i e TPRMIMs FORMIMs and CXRMIMs These MIMs repeat packets on their own without the EMM E6 Ethernet Channels and C handle network traffic over the RIC management bus on the FNB When frames have destination addresses for the same bus e the sending RIC MIM transmits the frames over its designated Ethernet bus e the other RIC MIMs on this bus receive the frames and repeat them the EMM E6 receives the frames and after determining the destination filters the frame EMM E6 User s Guide 1 13 CHAPTER 1 INTRODUCTION When frames have destination addresses for a different bus e the sending RIC MIM transmits the frames over its designated Ethernet bus e the other RIC MIMs on this bus receive the frames and repeat them e the EMM E6 after determining the source and destination forwards the traffic accordingly In addition to providing management for these modules the EMM E6 also gathers Network Board and Port Level performance and error statistics for each individual RIC MIM on Channels B and or C 1 4 3 Other FNB Modules Third Party MIMs The EMM E6 recognizes the third party MIMs listed below and provides each module with support concerning the statistics on the ba
38. purpose of the Subnet Mask is to indicate the part of the Host ID that is being used as a subnet address By default no part of the Host ID is used and therefore the default or Natural Mask masks just the octets that comprise the Network ID Table 1 5 shows the default masks for the four classes of IP networks Table 1 5 Class and Default Masks Network Class Length of Network ID Default Mask Class A X 255 0 0 0 Class B X X 255 255 0 0 Class C X X X 255 255 255 0 1 26 EMM E6 User s Guide REVIEW OF ADDRESSING The binary 1 s in the mask mask out the Network ID and the 075 show where the Host ID is located When using part of the Host ID as a subnet address define a Subnet Mask that will mask out the bits of the Host ID that are being used as a subnet address The calculations for the mask must be done at the bit level since in some cases and in all cases for Class C addresses the last octet must be split into part Host ID and part Subnet ID Figure 1 3 below shows the means by which a Subnet Mask blocks bits from an IP address to determine which bits are representing a Subnet ID and which represent a Host ID Network Actual 195 191 21 XXX Class C Network ID assigned by IANA This class of network allows for the creation of up to 254 Host IDs on one network 1 1 xx x x x xx x
39. such as Cabletron s Remote LANVIEW Windows SPECTRUM SPECTRUM Element Manager or the appropriate SPECTRUM Portable Management Application Refer to specific package documentation for image file download procedures The EMM E6 supports the following Download applications Forced Download Forcing a download of firmware images is accomplished using Switch 6 of the EMM E6 and a pre configured reverse address resolution protocol server holding the firmware image Standard Local Download the EMM E6 automatically disables management while you download the new firmware image You can not perform a Standard Download from a BRIM port Remote Runtime Download the EMM E6 continues to operate without interruption while you download the new firmware image The EMM E6 stores the new image in Flash memory It continues to operate with the old firmware image executing in processor memory until you reset the EMM E6 You can perform a Runtime Download from any network port including the BRIM EMM E6 User s Guide 15 1 CHAPTER 15 IMAGE FILE DOWNLOAD 15 1 GETTING STARTED Cabletron ships backup copies of image files for all of its intelligent devices The first file suffixed with hex after it has been decompressed from a zip is for Standard Local Downloading any port except the BRIM The second file suffixed with fls after it has been decompressed from a zip is for Remote Runtime Downloading through any network port including th
40. the download process after you reinstall the board The EMM E6 boot PROM must recognize the switch position change to initiate a download sequence This means you must power up the EMM E6 at least one time for it to load initial switch positions into memory 5 Follow the installation procedures from Chapter 3 to re install the EMM E6 properly Image file download takes several minutes While downloading the EMM E6 CPU LED flashes and the XMT RCV pair receiving the image flickers rapidly The EMM E6 Boot up Diagnostics indicate a file transfer from a server is in progress After the image file download is complete verify that Local Management displays the correct image file FW version number 15 6 EMM E6 User s Guide STANDARD LOCAL DOWNLOAD 15 3 STANDARD LOCAL DOWNLOAD Table 15 1 provides a step by step procedure for downloading the firmware image file This section provides specific MIB OIDs their names and the required setting for proper image file download Refer to your specific MIB walking tool documentation for instructions on how to set MIB OID strings The Download OIDs for Cabletron products reside in Cabletron enterprise MIBs group 52 The specific OIDs necessary to perform an image file download reside in the common download group under ctDL Cabletron Download The full OID string to reach this group is 1 3 6 1 4 1 52 4 1 5 8 1 When performing the steps in Table 15 1 keep the following in mind e
41. users for example Ethernet A contains Novell users Ethernet B contains TCP IP and NFS users and Ethernet C contains DECnet users 2 12 EMM E6 User s Guide SAMPLE NETWORK CONFIGURATIONS The Star Hub which is an MMAC FNB that uses a configuration similar to the closet hubs is the central repeater interconnect for the closets but does not constitute a single point of failure The in each MMAC FNB utilizes the 802 1d Spanning Tree Algorithm By configuring the Root Path Cost and the Bridge Priority on the EMM E6 you can bridge primary paths from each segment to Network D from each EMM E6 indicated by the solid line between Ethernet channel A and the bridge in closet 1 Ethernet channel B and the bridge in closet 2 and Ethernet channel C and the bridge in closet 3 The dotted lines between the other Ethernet channels and the bridge show the backup paths in a standby condition If any repeater link fails or if an active bridge path fails one or many backup bridge paths may become active replacing the failed repeater link or bridge path An additional level of redundancy is achieved by using the cable redundancy algorithm built into Cabletron s EMM E6 This feature enables you to configure redundant bridge paths with one path remaining in backup standby mode until the primary path fails In the example Segment D provides a manageable backbone using a MiniMMAC Segment D provides intercommunication for channels A B
42. 14 2 XMT 14 3 LANVIEWSECURE 1 33 Latency A 1 LEDs 1 33 14 1 Link Length 10BaseT 2 2 Multimode fiber 2 4 Single Mode 2 5 Thin coax 2 6 Local Download 15 1 ls 13 6 EMM E6 User s Guide MAC address 1 22 Memory 3 6 A 1 EEPROM 1 7 Local Dynamic 1 8 Shared Dynamic 1 8 MIB 1 22 access 13 2 description 13 1 hierarchy 13 1 managing devices 13 1 mib2 13 7 Mode Switches 3 3 Multi Media Access Center 1 10 N Natural Mask 1 26 netstat 13 12 Network ID 1 23 next 13 7 Non Volatile RAM 3 5 O OID 1 22 B 1 description 13 1 editing viewing 9 1 getting 9 4 setting 9 5 OSI model 1 17 EMM E6 User s Guide P Partitioning Networks 1 25 Password 3 5 Screen 5 1 Setting 6 1 ping 13 12 Ports enabling 7 9 Pinouts A 3 unlocking 7 9 Propagation Delay 10BaseT 2 3 multimode fiber 2 4 pwd 13 8 Q quit 13 16 R Read only 1 21 Read write 1 21 Read Only 6 2 Read Write 6 2 Remote runtime download 15 1 Requirements 10BaseT 2 2 Fiber Optic 2 4 2 5 Thin Coax 2 6 Reset Switch 1 33 14 7 RIC MIM 1 13 2 7 RMON Groups Supported 1 8 Index iii 5 Safety 4 Sample Configurations 2 9 Security 1 33 Community names 1 21 SET 1 21 set 13 8 SIMM Upgrade 3 6 Slash notation 13 4 SNMP 1 21 SNMP Tools screen 9 1 SNMP Traps 8 1 snmpbranch 13 13 snmpget 13 13 snmpset 13 14 snmptree 13 14 Spanning Tree Algorithm 1 19 Specifications A 1 Environmental A 3 Statistics viewing 11 1 su 13 9 Subnet
43. 2 1 2 1 1 10BASE T Twisted Pair Network 2 2 2 1 2 Multimode Fiber Optic Network 2 4 2 1 3 Single Mode Fiber Optic Network 2 5 2 1 4 Thin net 80 2 6 2 2 TRANSCEIVER REQUIREMENTS 2 6 2 3 REPEATER MEDIA INTERFACE MODULES 2 7 2 4 PORT ASSIGNMENT MODULES 2 8 2 5 SAMPLE NETWORK CONFIGURATIONS 2 9 2 5 1 Three Networks With a Single MMAC FNB 2 10 2 5 2 EMM E6 as a Multiport Router 2 10 2 5 8 Adding Users to a Separate Segment 2 11 2 5 4 A Fault Tolerant Wiring Hierarchy 2 12 2 5 5 EMM E6 and 5 2 14 CHAPTER3 INSTALLATION 3 1 UNPACKING THE 3 2 3 2 SETTING MODE SWITCHES 3 3 3 3 SIMM 5 3 6 3 3 1 Locating 5 5 3 6 3 3 2 Installing 5 3 8 3 4 ADDING REPLACING EPIMS 3 9 3 5 LOCATING 5 3 10 3 6 PRE INSTALLATION 3 11 3 7 INSTALLING THE
44. 3 TX 7 NC 4 NC 8 NC Position not crossed over 1 TX 5 NC 2 TX 6 RX 3 RX 7 NC 4 NC 8 NC Figure 3 10 EPIM T Cross over Switch To connect an EPIM T to a Twisted Pair Segment 1 Connect the twisted pair segment to the module by inserting the RJ45 connector on the twisted pair segment into the RJ45 port on the module See Figure 3 10 EMM E6 User s Guide 3 19 CHAPTER 3 INSTALLATION 2 Check that the LNK LED for the port is on If the LED is not on perform each of the following steps until it is a Check that the IOBASE T device at the other end of the twisted pair segment is powered b Verify that the RJ45 connectors on the twisted pair segment have the proper pinouts Figure 3 11 c Check the cable for continuity d Check that the twisted pair connection meets dB loss and cable specifications outlined in IOBASE T Twisted Pair Network Requirements Chapter 2 EPIM T 10 5 Device Port Port RX TX TX NOTE RA 2 RX4 RX and TX4 TX RJ 45 to RJ 45 must share a common color pair TX RX TX RX Figure 3 11 Cable Pinouts EPIM T RJ45 Port If you still cannot establish link contact Cabletron Technical Support 3 20 EMM E6 User s Guide CONNECTING THE NETWORK 3 9 2 Connecting an AUI Cable to an EPIM X The Signal Quality Error SQE switch remains in the OFF NOTE position for most network connections However some Data Terminal Equipment DTE requi
45. 4 EFT B levels 1 through 4 It is the responsibility of the person who sells the system of which the EMM E6 will be a part to ensure that the total system meets allowed limits of conducted and radiated emissions A 7 PHYSICAL PROPERTIES Dimensions 34 04D x 29 21H x 7 64W cm 13 4D x 11 5H x 3 0W in Weight Unit 1 25 kg 2 75 Ibs Shipping 1 74 kg 3 83 Ibs A 4 EMM E6 User s Guide 8 10BASE T TWISTED PAIR PORT Internal Transceiver Cabletron Systems TPT 10BASE T Twisted Pair Transceiver Type 8 Pin RJ45 Jack Figure A 1 LNK Figure 1 with RJ45 Port A slide switch on the EPIM T determines the cross over status of the cable pairs The switch residing on the X side indicates the pairs internally cross over If the switch resides on the z side the pairs do not internally cross over See Figure A 2 Position X crossed over 1 RX 5 NC 2 RX 6 TX 3 TX 7 NC 4 NC 8 NC Position gt not crossed over 1 TX 5 NC 2 TX 6 RX 3 RX 7 NC 4 NC 8 NC Figure 2 Cross over Switch on the EPIM T EMM E6 User s Guide A 5 APPENDIX 6 SPECIFICATIONS 9 1 2 MULTIMODE FIBER OPTIC PORT Internal Transceiver Cabletron Systems FOT F Fiber Optic Transceiver Type EPIM FI SMA fiber optic ports Figure A 3 EPIM F2 ST fiber optic ports Figure A 3
46. 5 Image File Download provides instructions to download a new image file to the EMM E6 by setting specific MIB OID strings 1 2 EMM E6 User s Guide USING THIS MANUAL Appendix EMM E6 Specifications details the properties of the EMM E6 and currently available EPIM modules Appendix B OID Descriptions supplies information detailing the Object Identifiers that may be accessed for managing the EMM E6 Following the Appendices is a brief Glossary of Terms which provides short definitions for terms related to items and concepts referred to in this manual EMM E6 User s Guide 1 3 CHAPTER 1 INTRODUCTION 1 2 EMM E6 FEATURES 1 4 1960 Processor Design IEEE 802 1d Compliant Available Routing Services Special Filtering Database Six port Ethernet Bridge Integrated BRIM technology User Configurable EPIMs Expandable Flash EEPROM Memory and Runtime download Expandable Local DRAM Expandable Shared DRAM SNMP and RMON Support LANVIEW Diagnostic LEDs DLM Support Local Communication Ports UPS Proxy Agent Support In Band Telnet with MIB Navigator Port Locking and LANVIEWSECURE Support ETHERNET EMM E6 User s Guide EMM E6 FEATURES i960 Processor Design The EMM E6 is equipped with an advanced Intel 1960 microprocessor that provides a scalable RISC based architecture IEEE 802 1d Compliant The is a fully IEEE 802 14 compliant Ethernet bridge The EMM E6 supports bo
47. 5 6 us in one direction 51 2 us round trip If the total propagation delay between any two nodes on the network exceeds 25 6 us you must either reduce the delay or use a bridge e Length The maximum possible multimode fiber optic cable length is 2 km 2187 2 yards However IEEE 802 3 FOIRL specifications specify a maximum of 1 km 1093 6 yards 2 4 EMM E6 User s Guide NETWORK REQUIREMENTS 2 1 3 Single Mode Fiber Optic Network When connecting a single mode fiber optic link segment to the hub via EPIM F3 ensure the network meets the following requirements Cable Type Fiber optic link segments should consist of 8 125 to 12 125 um single mode fiber optic cabling You can also use 62 5 125 um multimode cable with the EPIM F3 however multimode cable has greater optical loss and limits the possible distance to 2 km Attenuation You must test the fiber optic cable with a fiber optic attenuation test set adjusted for a 1300 nm wavelength This test verifies that the signal loss in a cable falls within the acceptable level of 10 0 dB or less for any given single mode fiber optic link Budget and Propagation Delay When you determine the maximum fiber optic cable length to incorporate fiber runs into your network you must calculate and consider the fiber optic budget a total loss of 10 0 dB or less is permissible between stations and total network propagation delay To determine the fiber optic budget combine the optica
48. C addressing in greater detail 1 10 2 IP Addresses Each network interface or TCP IP host is identified by a 32 bit binary number called the Internetwork Protocol IP address An IP address represents a connection to the network but does not identify any specific physical device location physical locations are determined by MAC Addresses discussed earlier in this chapter Every IP address is made up of four 8 bit binary numbers octets Each octet is translated into its decimal equivalent and represented using Dotted Decimal Notation DDN The DDN format is XXX XXX XXX XXX Any of the four DDN values called fields can range from 1 octet 0000 0001 to 255 octet 1111 1111 An IP address is made up of two portions the Network ID and a Host ID Network IDs refer to a particular network and are assigned by the Internet Assigned Numbers Authority IANA The IANA assigns fixed numbers to one two or three of the fields in order to provide a unique Network ID Once a Network ID has been assigned the Network Manager assigns individual Host IDs by configuring different values within the allowable ranges for the octets not set by the IANA This allows individual hosts on the network to be identified by distinct numerical addresses There are three classes of IP addresses which define the Network and Host ID numbering scheme Tables 1 1 through 1 3 describe the classes The bold type in these tables indicates a field assigned by the IANA t
49. D 07 50 12 Default Interface NONE Default Gateway NONE DEFINED COM 1 Application UPS Baud Rate 2400 ACTIVE COM 2 Application CONSOLE Baud Rate 9600 ACTIVE Port Lock Override OVERRIDE DISABLED Port Enable Override OVERRIDE DISABLED SAVEIPs TRAPTABLE SNMPTOOLS CLI RETURN F6 F8 F9 F10 Figure 7 1 Configuration Screen EMM E6 User s Guide 7 1 CHAPTER 7 CONFIGURATION SCREEN 7 2 CONFIGURATION SCREEN FIELDS The following briefly explains each Configuration Screen field I F Displays the interface number 1 to 6 corresponding to a particular EMM E6 channel This number allows the EMM E6 to accurately identify MIB II channel information The following table illustrates the I F number to channel association Channel Channel A is the original Ethernet bus channel Channels B amp C are the Flexible Network Bus FNB channels Channel D 15 an external Ethernet network accessed through an Ethernet Port Interface Module Channels E and F are external connections through optional BRIMs Refer to Chapter 1 of this User s Guide for a more complete description of channels Channel E and F configuration options are dynamic This means the EMM E6 only provides options for Channels E or F if you have a BRIM module installed in one of these slots IP Address Displays the IP address for each interface of the EMM E6 This
50. Detection CSMA CD is the basis for the operation of Ethernet networks CSMA CD is the method by which stations monitor the network determine when to transmit data and what to do if they sense a collision or other error during that transmission Information typically in the form of a series of bits which is intended to be stored altered displayed transmitted or processed A condition caused by the creation of duplicate paths which network transmissions could follow Data loops are created by the use of redundant connections between network segments or devices Ethernet networks cannot effectively function with data loops present To allow the creation of fault tolerant networks data loops are automatically detected and eliminated by the Spanning Tree algorithm A 15 pin connector used to terminate transceiver cables in accordance with the AUI specification A 9 connector typically used in Token Ring networks and for serial communications between computers The translation of data from an encrypted form into a form both recognizable and utilizable by a workstation node or network device EMM E6 User s Guide Dedicated Default Gateway Device network DLM DNI EEPROM Encryption EPIM Ethernet Fault Tolerance Dedicated to Fault Tolerance Assigned to one purpose or function the IP address of the network or host to which all packets addressed to unknown network or host are sent An
51. HAPTER 13 MIB NAVIGATOR 13 1 MANAGING DEVICE MIBs eee 13 1 132 ACCESSING THE MIB 13 2 133 NAVIGATOR COMMAND SET OVERVIEW 13 3 13 3 1 Conventions For MIB Navigator Commands 13 3 13 3 2 Navigation 13 4 13 3 3 Built In 13 11 13 3 4 Special 13 16 CHAPTER 14 TROUBLESHOOTING 14 4 14 1 142 TROUBLESHOOTING CHECKLIST 14 4 14 8 USING THE RESET 14 7 CHAPTER 15 IMAGE FILE DOWNLOAD 151 GETTING STARTED aiite ntt Rete 15 2 15 2 FORCED DOWNLOAD WITH 15 3 15 3 STANDARD LOCAL DOWNLOAD nen 15 7 15 4 REMOTE RUNTIME 15 8 X EMME E6 User s Guide TABLE 5 APPENDIX A EMM E6 SPECIFICATIONS A 1 BRIDGING FUNCTIONALITY eee A 1 A 2 REPEATER FUNCTIONALITY A 2 A 3 COM T PORT de ete ted iig tpe tei cete A 3 A 4 COM 2 PORT a iiiter ehe pite diei dete A 3 A 5 ENVIRONMENTAL REQUIREMENTS A 3 A 6 SAEETY aite
52. MAC 5 Baud Rate Default Sets local management console port baud rate OFF default 9600 Baud ON 2400 baud 6 Forced Download When toggled forces image files to be loaded from BOOTP server by clearing information from NVRAM 7 NVRAM Reset When toggled deletes user parameters stored in NVRAM and returns these parameters to factory default settings Password Default When toggled deletes user defined passwords stored 8 in NVRAM and returns these passwords to factory default settings public or Return EMM E6 QUICK REFERENCE CARD EMM E6 QUICK REFERENCE CAHD INSTALLATION Slide the EMM E6 into the first and second slots of the chassis as shown below EMM E6 Secure the module by tightening the knurled knobs at the top and bottom of the module Power on the chassis Monitor the state of the CPU LED The CPU LED will flash indicating the EMM E6 is in boot state During this period which may last up to 5 minutes the STBY LEDs will blink to indicate the module s boot state Fully operational EMM E6 should display the following LED states CPU LED flashing indicating normal operation STBY LEDs lit or unlit depending on the results of spanning tree operation Appropriate BRIM EPIM LEDs lit ON LED lit for the active Channel D EPIM TERMINAL SETUP Use the following setup parameters for a VT Terminal or Terminal
53. MM E6 displays MIB NO INSTANCE Otherwise the EMM E6 displays that OID s data type length and value If you have previously entered an OID press F9 to recall that gt entry You can use the arrow keys to modify the recalled OID or if you have not previously entered the OID type the OID minus the OID s prepend To set an OID 1 2 Highlight SET using the arrow keys Press the Return key lt SET gt OID IF9 appears Enter an OID Press the Return key If that OID does not exist the EMM E6 displays MIB_NO_INSTANCE Otherwise the EMM E6 displays INteger String Null Old IP address Counter Gauge Timeticks OPaque DATA TYPE name EMM E6 User s Guide 9 5 CHAPTER 9 SNMP TOOLS SCREEN If you have previously entered an OID press F9 to recall that entry You can use the arrow keys to modify the recalled OID or if you have not previously entered the OID save yourself some keystrokes by typing the OID minus the OID s prepend 5 Enter the OID s Data Type When setting a String SNMP tools requests the kind of data you plan to enter HEX or ASCII 6 Press the Return key The EMM E6 displays SNMP OID DATA 7 Enter the Data or value of the OID 8 Press the Return key If the EMM E6 accepts the entry it displays lt SET gt OPERATION CODE XXXX lt OK gt otherwise an error message appears 9 5 SCROLLING THROUGH MIB OIDS Viewing several object identifiers at one tim
54. NG REPLACING This section contains procedures on how to add replace an Ethernet Port Interface Module EPIM to upgrade or change the capabilities of your hub After installing your new EPIM refer to appropriate EPIM sections in this chapter to verify proper operation Observe all anti static precautions when handling sensitive electronic equipment To install an EPIM When removing an EPIM make sure to pull the module NOTE straight out so as not to damage the connector 1 Remove the coverplate or the whichever applies 2 Slide your new EPIM into place making sure the connectors on the rear of the module and inside the hub attach properly 3 Install the mounting screw Mounting Screw xd o P d ie E E toot M E 2 1 T sd j xi EPIM oro D o E vm i o EMM E6 i Figure 3 4 Installing EMM E6 User s Guide 3 9 CHAPTER 3 INSTALLATION 3 5 LOCATING BRIMs This section points out Bridge Router Interface Module BRIM connector locations on your EMM E6 board Refer to your BRIM Guide for installation procedures and additional information The following diagram Figure 3 5 shows BRIM connector locations for the EMM E6 r Channel E BRIM Connector BRIM F Ribbon Cable Connector Channel BRIM Connector Standoff EMM E6 Figure 3 5 BRIM Connector Location
55. PIM F3 Statistics Parameter Typical Minimum Maximum 5 eak 1500 nm 1270 nm 1330 nm Spectral Width 60 nm 100 nm Rise Time 3 0 ns 2 7 ns 5 0 ns Fall Time 2 5 ns 2 2 ns 5 0 ns Duty Cycle 50 1 49 6 50 7 TX Power 15 1 dBm TX Budget 14 4 dBm RX Sensitivity 29 5 dBm 2 6 99 dBm Bit Error Rate Better than 10 The above transmitter power levels and receive sensitivity levels represent Peak Power Levels after optical overshoot You must use a Peak Power Meter to correctly compare the above values to those you measure on any particular port If you measure Power Levels with an Average Power Meter you must subtract 3 dBm from the measurement to correctly compare those measured values to the values listed above e g 29 5 dBm peak 32 5 dBm average A 8 EMM E6 User s Guide 11 BNC PORT Internal Transceiver Type Cabletron Systems TMS 3 Transceiver BNC receptacle with gold center contact for use with BNC type T connectors and RG 58 thin net cable Figure A 5 19 TERM mil e EPIM G Internal Termination Switch On internally terminated Off need external termination Figure 5 with BNC Port Termination Grounding Using the switch to the side of the port you can internally terminate the port on the module via a built in 50Q terminator This eliminates the need to connect the port to a T connector and termin
56. PREPEND 1 3 6 1 GET SET GETNEXT WALK RECALL OID STEP CYCLES REPEAT F6 F8 F9 RETURN F10 Figure 9 1 SNMP Tools Screen EMM E6 User s Guide 9 1 CHAPTER 9 SNMP TOOLS SCREEN 9 2 SNMP TOOLS SCREEN FIELDS The following describes the SNMP Tools Screen fields and commands COMMUNITY NAME Identifies the community name MIB access level password OID PREPEND Specifies the number prefix common to all object identifiers OIDs found in a MIB The prefix 1 3 6 1 is the default You can modify this field to suit your needs GET Allows you to retrieve MIB objects one at a time using SNMP protocol SET Lets you edit modifiable MIB objects using SNMP protocol GETNEXT Displays the next OID in the MIB tree by getting the next SNMP OID from a remote agent WALK Scrolls through the MIB leaf by leaf from a user specified object identifier Leaves are objects or instances of objects After initializing a walk you see the following categories for each entry Specified OID identifies the number tag for that OID e Size gives the number of bytes required to store the object e Data Type gives the object s variable type e g int integer e Data Value displays what the object identifier represents RECALL OID Recalls from memory the last OID used since powering up the board or re entering the SNMP Tools screen STEP Displays the MIB step by step with specific OID details 9 2 EMM E6 U
57. PTER 1 INTRODUCTION For any SNMP Trap generating network devices not residing on the same subnet as the network management station the default Subnet Mask utilized on that device must be altered to match the subnet scheme In the above example the default Subnet Mask is modified from 255 255 255 0 to 255 255 255 240 For each SNMP Trap generating device with a modified Subnet Mask a Default Gateway is assigned In the event that any of the custom masked devices generated an SNMP Trap for the network management station a comparison of the Subnet Mask and the Network ID indicates that the SNMP Trap should be sent to that subnet s Default Gateway to be routed to the subnet where the network management station resides The procedures for modifying the Subnet Mask and configuring the Default Gateway through Local Management may be found in Chapter 7 of this User s Guide which deals with the Configuration Screen 1 32 EMM E6 User s Guide LANVIEW LEDs AND RESET SWITCH 1 11 LANVIEW LEDs AND RESET SWITCH The EMM E6 incorporates the Cabletron Systems LANVIEW Status Monitoring and Diagnostics System LANVIEW LEDs can help diagnose any problems such as a power failure or a cable fault The module includes the following LANVIEW LEDs e CPU Central Processing Unit LED for board status e STBY Standby RCV Receive XMT Transmit CLN Collision LEDs for Ethernet Status e Power LEDs for the two slots The fron
58. Pair RJ45 connector FPIM 05 Single Mode Fiber Physical Media Dependant SMF PMD compliant single mode fiber optic MIC connector EMM E6 User s Guide EMM E6 FEATURES BRIM A6 100 155 Mbps ATM Station connection with configurable connector The BRIM A6 uses Port Interface Modules APIMs APIMs allow a media flexibility for ATM connections like that provided by FPIMs described above The following APIM types are currently available e 11 100 Mbps multimode fiber optic SC connector e 21 155 Mbps multimode fiber optic SC connector e 29 155 Mbps single mode fiber optic SC connector User Configurable EPIMs The fourth channel D directs traffic to one of two external Ethernet Port Interface Modules EPIMs The following list contains the currently available EPIMs e EPIM T 10BASE T RJ45 Port e Sub Miniature Assembly SMA connectors for multimode fiber optics e 2 Straight Tip ST connectors for multimode fiber optics e EPIM E3 Straight Tip ST connectors for single mode fiber optics RG 58 connector for thin coaxial cabling e EPIM A Female DB15 connector for AUI cabling e EPIM X Male DB15 connector for AUI cabling Expandable Flash EEPROM Memory The EMM E6 incorporates 2 MB of Flash Electrically Erasable Programmable Read Only Memory Flash EEPROM Flash memory holds the operating instruction code of the EMM E6 When the mo
59. The DISABLE PORT command lets you disable the port selected in the PORT command You must first use the PORT command to select the desired port To set the PORT DISABLE command 1 Use the arrow keys to highlight the DISABLE PORT command at the bottom of the screen 2 Press the Return key The PORT ADMIN STATUS field displays DISABLED 11 3 EXITING THE DEVICE STATISTICS SCREEN To exit the Device Statistics screen 1 Use the arrow keys to highlight the RETURN command at the bottom of the screen 2 Press the Return key The Feature Selection screen appears 11 6 EMM E6 User s Guide 12 COMMAND LINE INTERFACE SCREEN The Command Line Interface CLI Screen Figure 12 1 will function in future releases of the EMM E6 EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 CLI INFORMATION THIS SCREEN RESERVED FOR THE CABLETRON COMMAND LINE INTERFACE COMMUNITY NAMES IP TABLE TRAP TABLE SNMP TOOLS RETURN F7 F8 F9 F10 Figure 12 1 EMM E6 CLI Information Screen EMM E6 User s Guide 12 1 13 This chapter describes the procedures required to access the MIB Navigator residing on the EMM E6 The MIB Navigator Command Set is described and examples of each command are provided 13 1 MANAGING DEVICE MIBs The MIB Navigator allows access to a command set from which you can configure and manage your device The MIB Navigator enables you to manage objec
60. The capacity to function in conjunction with other devices Used primarily to indicate the ability of different vendors networking products to work together cohesively Internet Protocol GL 7 Address to Mbps IP Address ISO Jitter LAN LANVIEW LDRAM Leaf Object LED Load MAC Address Mbps GL 8 Internet Protocol address The IP address is associated by the network manager or network designer to a specific interface The availability of IP addresses is controlled by the IANA International Organization for Standardization The ISO has developed a standard model on which network operation is based called the OSI Model Degradation of network signals due to a loss of synchronization of the electrical signals Jitter is often a result of passing a signal through too many repeaters Local Area Network A system which relates diagnostic troubleshooting and operational information pertaining to network devices through the use of prominently displayed LEDs Local Dynamic Random Access Memory An end unit in a MIB tree Leaf objects are accessed through a series of branch groups Leaf objects are always individual MIBs Light Emitting Diode simple electronic light used in networking equipment to provide diagnostic indicators Also used as a light source for some fiber optic communications equipment An indication of network utilization Media Access Control address The MAC addres
61. Tree Bridges are network devices which connect two or more separate network segments while allowing traffic to be passed between the separate networks when necessary Bridges read in packets and decide to either retransmit them or block them based on the destination to which the packets are addressed Bridge Router Interface Module BRIMs are added to BRIM capable Cabletron equipment to provide connections to external networks through an integrated bridge or router EMM E6 User s Guide Broadcast Buses Card Channel Chassis Client Client Server Coaxial Community Name Concentrator Congestion Connectivity Broadcast to Connectivity A type of network transmission a broadcast transmission is one which is sent to every station on the network regardless of location identification or address Physical portions of the backplane of a modular chassis which pass information between modules See Module A portion of a backplane bus which is specifically partitioned off for the transmission of one type of network data See Modular Chassis A workstation or node which obtains services from a server device located on the network A computing model which is based on the use of dedicated devices servers for the performance of specific computational or networking tasks These servers are accessed by several clients workstations which cannot perform those functions to the same extent or with the same e
62. You must follow the steps in order Enter the IP address of the tftp server in standard dotted decimal notation e g 132 177 118 24 e Enter the FULL path to the image file in the ctDLTFTPRequest OID including the name of the image file e g c tftpboot EMME6 hex Table 15 1 Standard Download Procedure Data SNMP Ste OID Name OID Number OID Data 1 ctDLForceOnBoot 1 3 6 1 4 1 52 4 1 5 8 1 1 0 integer 1 2 ctDLCommitRAMToFlash 1 3 6 1 4 1 52 4 1 5 8 1 2 0 integer 1 3 ctDLTFTPRequestHost 1 3 6 1 4 1 52 4 1 5 8 1 4 0 IP Enter the IP address address of the tftp server 4 ctDLTFTPRequest 1 3 6 1 4 1 52 4 1 5 8 1 5 0 string Enter the ASCIl path to the image file 5 ctDLInitiateColdBoot 1 3 6 1 4 1 52 4 1 5 8 1 3 0 integer 1 EMM E6 User s Guide 15 7 CHAPTER 15 IMAGE FILE DOWNLOAD 15 4 REMOTE RUNTIME DOWNLOAD If the Runtime Download is interrupted the Firmware Image in Flash memory will be erased The EMM E6 will continue to operate until it is either Reset or Powered OFF and ON After either of these events the EMM E6 can download Firmware Image from a BootP server ONLY The process of configuring a BootP Server is discussed at length in Cabletron s Installing and Using Remote LANVIEW for Windows Although Runtime Download is a powerful network operations amp firmware management feature careful consideration should be given to both the timing best when
63. able gives the part numbers of the MMAC chassis that have shunting capabilities 1 10 EMM E6 User s Guide THE MMAC WITH FLEXIBLE NETWORK BUS Table 1 1 MMACS with Shunting Capabilities MMAC Chassis Part MMAC 3FNB 000000000 or above MMAC 5FNB CC000000000 or above MMAC 8FNB CG000000000 or above MMAC MSENB DK000000000 or above MMAC MS5FNB all all CCCCCCCCS If your MMAC does not have a shunting backplane upgrade kits are available For additional information on shunting backplanes or how to upgrade your hub contact Cabletron Systems Technical Support EMM E6 User s Guide 1 11 CHAPTER 1 INTRODUCTION 1 4 ETHERNET CHANNELS A B C D E and F The EMM E6 manages all Ethernet bridging traffic within its resident hub This means that the EMM E6 controls up to six of the Ethernet bridging channels A B C D E and in the future F These channels access the same EMM E6 shared memory so bridging between channels is concurrent 1 4 4 Ethernet Channel A Channel A operates over the MMAC Power and Management Bus Cabletron s original Ethernet channel Only Cabletron Systems non repeater MIMs 1 TPMIMs FOMIMs and THN MIMs access the EMM E6 through Ethernet Channel A Additionally the TPXMIM Ethernet Port Assignment modules are able to communicate through Ethernet Channel A as well as the additional backplane channels When the EMM E6 receiv
64. ailable for Host IP address configuration make that determination based on the binary value of the first DDN field Tables 1 1 to 1 3 show that different address classes have different initial bits in the first octet A Class A address for example will always have a Zero as the first bit of the first octet To identify an IP address class convert the decimal value of the first DDN field to binary Example 132 177 118 24 Convert first DDN field to binary 132 10000100 Since the first two bits of the octet are 10 the address is Class B Refer to the IP address Classes tables each Class B address utilizes the first two fields for a Network ID 132 177 118 24 while the remaining two fields 132 177 118 24 are the Host ID 1 10 4 Subnet Addresses Subnet addresses are used to partition an IP network into multiple subnetworks or subnets The use of subnet addresses adds an additional layer of hierarchy to the IP addressing scheme This additional addressing layer facilitates isolation control and administration of users within the network at a cost of reduction in total available Host IDs This is done by grouping hosts into separate subnets To use the above Class B address 132 177 118 24 as an example the last two fields are available for the assignment of Host IDs If the Network Manager desired to use subnets the third field 118 could become common to a series or group of hosts with a common physical location or intended p
65. and port system used with both multimode and single mode fiber optic cabling The ST connector utilizes an insert and twist lock mechanism See node Shielded Twisted Pair Refers to a type of cabling most commonly used in Token Ring networks which consists of several strands of cables surrounded by foil shielding which are twisted together See also UTP A length of multi stranded cable in which the transmit wire s of one end is are passed directly through the cable to the same location on the other end Straight through cables are used for most facility cabling See also cross over A physical network within an IP network A 32 bit quantity which may be set up in SNMP management devices to indicate which bits in an IP address identify the physical network A network device which connects two or more separate network segments and allows traffic to be passed between them when necessary A switch determines if a packet should be blocked or transmitted based on the destination address contained in that packet Transmission Control Protocol A device for displaying information and relaying communications Terminals do not perform any processing of data but instead access processing capable systems and allow users to control that system The rate at which discrete quantities of information typically measured in Mbps are received by or transmitted through a specific device EMM E6 User s Guide GL 13 Token to UTP Toke
66. and start the rarp daemon e g unix rarpd a Ensure that the tftpboot directory is not owned e g unix chown nobody tftpboot Store the hex image file in the tftpboot directory as emme6 hex This step requires decompression of the zipped image file If you do not have a UNIX unzip utility access to a PC with pkunzip or a way to FTP the decompressed image to your UNIX workstation contact Cabletron Technical Support 15 4 EMM E6 User s Guide FORCED DOWNLOAD WITH UNIX 7 Editthe etc inetd conf file by removing anything prior to the tftpboot daemon e g the sign that comments out the line 8 the inetd process e g unix kill HUP process ID number and then restart the process e g unix inetd to enable the revised inetd conf file You must request a process status and grep for inetd to obtain the process ID number see step 3 above EMM E6 User s Guide 15 5 CHAPTER 15 IMAGE FILE DOWNLOAD To force a download using the EMM E6 download switch 1 Remove the safety bars from the MMAC chassis 2 Unscrew the knurled knobs at the top and bottom of the front panel 3 Slide the MIM out of the chassis until you can easily access the EMM E6 switch panel located at the bottom of the board 4 Change the state of EMM E6 mode switch 6 For example if the switch is in the OFF position move it to the position and leave it there This change in position activates
67. arameters to the factory defaults Once the EMM E6 resets you can either use the defaults or re enter your own parameters The EMM E6 stores these parameters in NVRAM when the device powers down These parameters remain in NVRAM until the switch changes state again NOTE Do not change the state of Switch 7 unless you intend to reset the EMM E6 user parameters to the factory default settings Switch 8 Password Defaults Changing the state of this switch clears user entered passwords in NVRAM and restores factory default passwords Once you reset the EMM E6 you can use the defaults or re enter your own passwords Do not change the state of Switch 8 unless you intend to reset the EMM E6 user configured passwords to their factory default settings NOTE EMM E6 User s Guide 3 5 CHAPTER 3 INSTALLATION 3 3 SIMM UPGRADES The EMM E6 allows memory upgrades for SDRAM LDRAM and FLASH EEPROM This section explains how to locate and add or replace a Single In line Memory Module SIMM for any of these memory types For additional information on SIMMs or how to upgrade the memory in your Module contact Cabletron Systems Technical Support 3 3 1 Locating SIMMs Each memory type has a specific SIMM slot location on the EMM E6 mother board When installing SIMM boards make sure that you place them in their proper slots Figure 3 2 illustrates the EMM E6 SIMM slot locations and the direction in which to instal
68. are similar to frames but may be made up of control information frames or data to be transmitted A cabling term which indicates a cable with insulating material that is considered safe to use in return air plenum spaces in contrast to PVC insulation due to its low relative toxicity if 1gnited A physical connector which is used as an interface to cabling with modular or pinned connectors Ports are associated with Interfaces The association through software management of specific ports on a network device to specific channels of a backplane This assignment is done on an individual port basis EMM E6 User s Guide Protocol PVC Redundant Repeater RJ45 RMIM RMON Router SDRAM Protocol to SDRAM A set of rules governing the flow of information within a communications infrastructure Protocols control operations such as frame format timing and error correction See also Architecture Polyvinyl Chloride A material commonly used in the fabrication of cable insulation This term is used to describe a non plenum rated insulating material See also Plenum Extra or contingent A redundant system is one that is held in reserve until an occurrence such as a failure of the primary system causes it to be required A network device consisting of a receiver and transmitter which is used to regenerate a network signal to increase the distance it may traverse A modular connector style used with twisted pair
69. asked what value to assign it The following lists possible value types i nteger number c ounter number g auge number t ime ticks number value with quotation marks s tring value with quotation marks 0 id number number number a ddress IP address dotted decimal m ac physical address hex string n ull no type Format set lt OBJECTID gt VALUE Example MIBNav gt set 1 3 6 1 2 1 1 5 1st Floor Example MIBNav set 1 3 6 14 1 52 1 6 4 7 122 1 1 1 13 8 EMM E6 User s Guide MIB NAVIGATOR COMMAND SET OVERVIEW Navigation Commands cont d su The su command enables you to change your community name to allow for different access to the MIB The community name that you enter allows you either Basic Read Read Only Read Write or Super User access to that device s MIBs depending on the level of security access assigned the password through the Local Management Community Table Refer to Chapter 6 on how to establish a community name password Format su COMMUNITYNAME Example MIBNav su public tree The tree command provides a display of the entire MIB for the device Leaves and associated values are displayed in columns Format tree Example MIBNav gt tree EMM E6 User s Guide 13 9 CHAPTER 13 MIB NAVIGATOR Navigation Commands cont d whoami The whoami command displays your community string and access privileges to the MIB
70. ator For safety connect only one end of a thin net segment to earth ground Do not connect the BNC port of an EPIM C to earth ground Connecting a thin coaxial cable segment to earth ground at more than one point can produce dangerous ground currents EMM E6 User s Guide APPENDIX 6 SPECIFICATIONS 12 AND AUI PORT Interface Connector DB 15 Port female connector for EPIM A male connector for EPIM X Figure A 6 Type 15 position D type receptacle l R QE IM X Figure A 6 EPIM A and EPIM X AUI Port Table A 3 DB 15 Pinouts Pin 1 Logic Ref Pin 9 Collision 2 Collision 10 Transmit 3 Transmit 11 Logic Ref 4 Logic Ref 12 Receive 5 Receive 13 Power 12 Vdc 6 Power Return 14 Logic Ref 7 No Connection 15 No Connection 8 Logic Ref Connector Shell Protective Ground A 10 EMM E6 User s Guide APPENDIX EMM E6 OIDs This Appendix contains a selected number of OID strings that are among the most frequently needed The OIDs are implemented by using either the SNMP Tools procedures detailed in Chapter 9 or the MIB Navigator procedures located in Chapter 13 Note that the OIDs can be accessed using LANVIEW SPECTRUM SPMA or the SNMP element management packages of other vendors B 1 SPANNING TREE PROTOCOL The following OID is used to select the desired Spanning Tree Protocol ctBridgeStpProtocolSpecification
71. bined with the Default Gateway IP address Default Gateways are discussed later in this chapter Modify the default Subnet Mask for the EMM E6 when workstations in the Trap table reside on a different subnet 1 across a gateway or external router and you want these workstations to receive SNMP Traps generated by the EMM E6 Caution should be exercised when configuring subnets as a poorly subnetted network can greatly increase network traffic by duplicating transmissions 1 10 7 Default Gateway The Default Gateway is the IP address of the network or host to which all packets addressed to unknown networks or hosts are sent The Default Gateway should be a perimeter or border device that connects the network with the rest of the world The Default Gateway attempts to route the packet to the correct destination This gateway is often used by managers to handle all traffic between private networks and the Internet If a Default Gateway is not defined the packets addressed to a network or host address not found in the forwarding table will be dropped 1 30 EMM E6 User s Guide REVIEW OF ADDRESSING 1 10 8 Addressing Example A network manager planning for the configuration of a network of 60 hosts desires to implement subnets to create logical divisions between different groups of workstations and devices The Internet Assigned Numbers Authority has supplied the company with a Class C Network Address 222 131 99 XXX Examining Tab
72. bletron Systems Technical Support Grounding For safety ground only one end of a thin net segment Do NOT connect EPIM BNC ports to earth ground Connecting a thin net segment to earth ground at more than one point could produce dangerous ground currents 2 2 TRANSCEIVER REQUIREMENTS When you connect an external network segment to an EPIM A in your hub through a transceiver that transceiver must meet IEEE 802 3 standards or Ethernet version 1 0 or 2 0 requirements The transceiver must also have SQE disabled 2 6 EMM E6 User s Guide REPEATER MEDIA INTERFACE MODULES 2 3 REPEATER MEDIA INTERFACE MODULES The EMM E6 communicates with the Repeater MIMs over Ethernet Channels and of the MMAC FNB The following repeater MIMs are currently available CXRMIM coaxial repeater MIM twelve 10 5 2 coaxial connectors one EPIM FORMIM 22 fiber optic repeater MIM twelve FOIRL 10BASE FL ports ST type connectors TPRMIM 20 TPRMIM 22 twisted pair repeater MIM RJ45 connectors 20 has nine 22 has twenty one one EPIM TPRMIM 33 TPRMIM 36 twisted pair repeater MIM 50 pin RJ71 connectors TPRMIM 33 has one TPRMIM 36 has two each RJ71 connector provides twelve 1OBASE T twisted pair ports twelve total for TPRMIM 33 twenty four total for TPRMIM 36 each MIM has one the TPRMIM 36 also has one AUI port For more information regarding Cabletron Systems Repeater MIMs refer to yo
73. branch 13 4 Bridge 1 17 BRIM 1 16 BRIMs 1 5 3 10 EMM E6 User s Guide INDEX C Channel 1 13 cd 13 5 Channel B 1 13 Channel C 1 13 Channel D 1 15 Channel E 1 16 Channel F 1 16 Channels A B C 1 12 Class A B C 1 24 Collision handling 1 18 Command Set 13 3 Community Names 1 21 3 5 Setting 6 1 Connecting to the Network 3 18 Crosstalk 2 3 ctron 13 5 CXRMIM 2 7 D D Channel 1 15 Data Link Level 1 17 Data loops STA 1 19 Default Gateway 1 30 Default Gateway setting 7 6 Device Statistics screen 11 1 Diagnostic LEDs 14 1 Dimensions 4 Dip Switches 3 3 dir 13 6 Distributed LAN Monitor DLM 1 9 done 13 16 Dot notation 13 4 Dotted Decimal Notation 1 23 Download OIDs 15 7 Index i E Channel 1 16 Eavesdrop Prevention 1 33 EMM E6 Features 1 4 Enabling Ports 7 9 EPIMs 1 7 Errors statistics 11 2 exit 13 16 F F Channel 1 16 Fault Tolerant Wiring 2 12 Filter 1 18 Filter Rate A 1 Firmware Upgrades 15 1 Flash Memory 1 7 Flexible Network Bus 1 10 Forced download 15 1 FORMIM 22 2 7 Forward Rate A 1 Forwarding 1 18 G GET 1 21 get 13 6 Grounding 2 6 H help 13 7 Host ID 1 23 Host IP Address 7 4 Index ii I IANA 1 23 Image File Download 15 1 Impedance 10BaseT 2 2 Insertion Loss 10BaseT 2 2 Installing 3 13 Interface number 7 2 Introduction 1 1 Intruder Prevention 1 33 IP addresses 1 23 L LANVIEW 14 1 CLN 14 3 CPU 14 2 RCV 14 2 STBY
74. ckplane and the control of channel selection for the entire module e CSMIM2 With supported connectivity for Channels A B or C in an FNB chassis MODMIM With supported connectivity for Channels A B or C in an FNB chassis e CRM 3E With supported connectivity for Channels A B or C in an FNB chassis e PCMIM With supported connectivity for Channel A in any MMAC chassis SNACMIM E With supported connectivity for Channel A in any MMAC chassis 1 14 EMM E6 User s Guide ETHERNET CHANNELS D E and F FDDI and Token Ring Modules The EMM E6 recognizes the following FDDI and Token Ring modules but the EMM E6 management does not provide control or statistics e CRM 3T e SNACMIM e TRMIM 32A e TRMIM 34A e TRRMIM F2T e TRRMIM F3T With TRMMIM version 2 02 or greater both Token Ring and Ethernet modules can reside in the same chassis and support physical management capabilities of the Token Ring MIMs using the TRMMIM as the Token Ring management module Without the TRMMIM the EMM E6 will only recognize the Token Ring modules TPXMIM The EMM E6 also supports Cabletron s family of Twisted Pair Switching Media Interface Modules TPXMIMs These modules provide board or individual port connectivity to Ethernet channel A B or C with full SNMP management including RMON AII ports initially default to Channel B upon power up and require a Management Information Base MIB c
75. ct appears the field 5 Use the arrow keys to highlight Connect 6 Press the Return key The request Y N appears 7 Enter Y if you want to connect a UPS or N if you do not want a UPS connection Entering a Y response connects the EMM E6 to the UPS and Active appears in the Connect field 8 Press the Return key To disable the UPS connection using EMM E6 LM 1 Use the arrow keys to highlight Active in the COM 1 field 2 Press the Return key The option Disconnect Y N appears 3 Enter Y if you want to disconnect a UPS or N if you want to remain connected Entering a Y response disconnects the EMM E6 from the UPS N A will appear in the Baud Rate field and the COM1 Application field changes to OFFLINE 4 Press the Return key 7 8 EMM E6 User s Guide UNLOCKING PORTS 7 7 UNLOCKING PORTS When you lock the chassis for security reasons e g using remote inband management unauthorized devices cannot communicate through an MMAC FNB chassis station port The Port LOCK Override function provides fail safe recovery if you cannot unlock ports using remote inband SNMP To use the Port LOCK Override 1 Use the arrow keys to highlight the Port LOCK Override field 2 Press the Return key The adjacent field displays UNLOCK ALL PORTS Y N 3 Enter Y to unlock all of the ports or N to discontinue the port lock override Responding with a Y unlocks all ports 4 Pr
76. d only read write and super user Super user access gives you full management privileges and allows you to change existing passwords and edit all modifiable MIB objects for the EMM E6 and additional Bridge Router Interface Modules BRIMs 6 1 ACCESSING THE COMMUNITY NAME TABLE To access the Community Name Table Screen 1 From the Feature Selection Screen use the arrow keys to highlight the Community Name Table option and press the Return key The Community Name Table Screen Figure 6 1 appears EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 COMMUNITY NAME TABLE lt lt PASSWORD AUTHORIZATION SUPER USER gt gt NOTE S U names are LOCAL passwords Community Name Access BASIC READ READ ONLY READ WRITE SUPER USER SAVE IP TABLE TRAP TABLE SNMP TOOLS CLI RETURN F6 E7 F8 F9 F10 Figure 6 1 Community Name Table Screen EMM E6 User s Guide 6 1 CHAPTER 6 COMMUNITY NAMES 6 2 COMMUNITY NAME TABLE SCREEN FIELDS This section briefly explains each Community Name Table Screen field Community Name Displays the community name through which a user can access LM AII community names act as passwords to Local Management Depending on the assigned access community names can vary in privileges Access Indicates the privileges accorded each community name Possible selections are BASIC READ The community name corresponding to this status has limited read only access to the EMM E6 and does not incl
77. d pairs this signal reflection has little effect on the quality of the received signal EMM E6 User s Guide NETWORK REQUIREMENTS e Jitter Intersymbol interference and reflections can cause jitter in the bit cell timing resulting in data errors 10BASE T links must not generate more than 5 0 ns of jitter Make sure your cable meets 10BASE T link impedance requirements to rule out jitter as a concern e Delay The maximum propagation delay of a 1OBASE T link segment must not exceed 1000 ns This 1000 ns maximum delay limits the maximum link segment length to no greater than 200 meters e Crosstalk Signal coupling between different cable pairs within a multi pair cable bundle causes crosstalk 0 transceiver design alleviates concerns about crosstalk providing the cable meets all other requirements Noise Crosstalk or externally induced impulses are causes of noise Impulse noise may cause data errors if the impulses occur at very specific times during data transmission Generally noise is not concern If you suspect noise related data errors you may need to reroute the cable or eliminate the source of the impulse noise Temperature Multi pair PVC 24 AWG telephone cables typically have an attenuation of approximately 8 10 dB 100 m at 20 C 78 F The attenuation of PVC insulated cable varies significantly with temperature At temperatures greater than 40 C 104 F we strongly recommend using plenum ra
78. d removed Also any device designed to be placed in another device in order to operate See also BRIM EPIM A Cabletron Ethernet design which provides three separate network channels of Ethernet or Token Ring architecture through the backplane of a chassis allowing for the creation of multiple networks in a single chassis A type of fiber optics in which light travels in multiple modes or wavelengths Signals in Multimode fiber optics are typically driven by LEDs One billionth of a meter EMM E6 User s Guide GL 9 Node to Port Assignment Node NVRAM Octet OID OSI Model Out Of Band Packet Plenum Port Port Assignment GL 10 Any single end station on a network capable of receiving processing and transmitting packets Non Volatile Random Access Memory Memory which is protected from elimination during shutdown and between periods of activity frequently through the use of batteries A numerical value made up of eight binary places bits Octets can represent decimal numbers from zero 0000 0000 to 255 1111 1111 Object Identifier Open Standards Interconnect model of the way in which network communications should proceed from the user process to the physical media and back Performed without requiring the operation of the network architecture Most commonly used in reference to local management operations A discrete collection of bits that form a block of information Packets
79. dule is activated the instruction code firmware held in Flash memory is forwarded to Main memory decompressed and used to startup the EMM E6 As the decompression of firmware slightly delays the initialization of the EMM E6 a Flash memory upgrade is available that allows the firmware to be held in its expanded form EMM E6 User s Guide 1 7 CHAPTER 1 INTRODUCTION Flash memory allows for the downloading of firmware to the module without requiring that the module be shut down The firmware download may be performed at any time during the operation of the module and the new firmware image will be utilized at the next reset of the module Expandable LDRAM The EMM E6 comes with 8 MB of Local Dynamic Random Access Memory LDRAM LDRAM is the Main memory from which the routing or bridging functionality of the EMM E6 operates When the EMM E6 needs to support additional functionality an LDRAM upgrade may be required If you are planning to add any functionality to your EMM E6 module determine if an LDRAM expansion is required Expandable SDRAM The EMM E6 comes with 4 Megabytes MB of Shared Dynamic Random Access Memory SDRAM SDRAM holds packets coming onto the module temporarily while forwarding filtering and error checking decisions are made While SDRAM has been designed to facilitate future expansion at this time there are no EMM E6 functions which require or are assisted by the expansion of SDRAM memory SNMP and RMON sup
80. e SETTING MODE SWITCHES 3 2 SETTING MODE SWITCHES The bank of dip switches located at the top of the EMM E6 Figure 3 1 are set to their default positions prior to shipping Check these switches to ensure that they are in the correct position for normal EMM E6 operation Switches EMM E6 EEEEEEEETETETETTELETETEITITEHI Duces am 7 Figure 3 1 EMM E6 Mode Switches The potential for electric shock is present inside the MMAC chassis when power is applied Do not adjust switch settings when the EMM E6 is within a powered enclosure Failure to comply could result in personal injury and or equipment damage EMM E6 User s Guide 3 3 CHAPTER 3 INSTALLATION NOTE Changes to switch positions only activate their associated functions after the is reset Switch definitions are as follows Switch 1 Cabletron Systems use only Switch 2 Cabletron Systems use only Switch 3 For manufacturing use only Keep in OFF position Switch 4 MIMREV Management Interface Module Revision This switch remains in the OFF position for normal operation Only if you are using THN MIM part numbers 9000043 05 and below in your MMAC FNB should the switch be in the ON position Switch 5 Baud Rate Default Allows you to s
81. e BRIM Before you can download the image to a device you must e load the image file onto your network rarp server For information on setting up a workstation as a rarp server refer to your specific workstation documentation This documentation includes limited information and guidelines for setting up a UNIX workstation to act as a reverse address resolution protocol rarp server e decompress the image file For your convenience Cabletron includes the PKUNZIP utility for easy decompression of the zipped file If you are using a UNIX workstation as a rarp server and you do not have a decompression utility that recognizes the PKZIP format you can obtain a copy of a UNIX decompression utility or the image file from the Cabletron Systems FTP server Contact Cabletron Technical Support for details 15 2 EMM E6 User s Guide FORCED DOWNLOAD WITH UNIX 15 2 FORCED DOWNLOAD WITH UNIX Downloading an EMM E6 image file with a UNIX workstation requires setting up a management station and forcing the download To force a download you can use mode switch 6 on the EMM E6 or set specific MIB OIDs You can also download with other UNIX or DOS remote management packages Refer to specific package documentation for image file download procedures Due to variations between UNIX systems and individual configurations this section provides only GUIDELINES for configuring a UNIX workstation to perform an image file downl
82. e allows you to quickly scan a MIB for the information that you need The SNMP Tools screen provides several scroll options e Walk scrolls through OIDs sequentially from the initial OID e Cycle allows you to specify how many GetNext commands to cycle through for one OID Step pages through the MIB one OID at a time 9 6 EMM E6 User s Guide SCROLLING THROUGH MIB OIDS To walk through the MIB 1 Highlight WALK using the arrow keys 2 Press the Return key lt INITIAL gt OID IF9 appears 3 Enter the OID 4 Pressthe Return key LM begins walking through the sublayers of the MIB available from the specified OID Each OID in the list displays the specified OID its size its data type and the data value 5 Press any key to stop the walk or wait for MIB WALK COMPLETED to appear on the screen To cycle through 1 Highlight CYCLES using the arrow keys 2 Press the Return key ENTER CYCLE COUNT appears 3 Enter the number of OID cycles that you want to scroll through 4 Press the Return key ENTER CYCLE DELAY appears 5 Enter the delay that you want in seconds between get next requests 6 Press the Return key lt INITIAL gt OID IF9 appears 7 Enter the OID 8 Press the Return key EMM E6 User s Guide 9 7 CHAPTER 9 SNMP TOOLS SCREEN To step through 1 Highlight GETNEXT using the arrow keys 2 Press the Return key lt GETNEXT gt OID IF9
83. e example in Figure 1 3 masks out the three high order bits of the only octet available for modification the last octet This provides for up to six subnets and up to 30 Host IDs within each subnet Modifying the default mask for a Class B address 255 255 0 0 to mask out the third octet for subnet purposes 255 255 255 0 would provide up to 254 subnets each containing up to 254 Host IDs Tables 1 7 and 1 6 show how using the mask determines the subnet and host addresses that are available from an individual octet These tables examine the Host IDs and Subnet Addresses available from the use of custom masks in both Class B and Class C IP addresses Bear in mind that Subnet Masks can only be modified for those fields which are not assigned to a site by the IANA Table 1 6 Examples of Class C Subnet Masks Decimal Binary Available Subnet Available Mask Equivalent Addresses Host IDs 192 11000000 64 and 192 1 62 224 11100000 32 64 96 128 1 30 192 224 240 11110000 16 240 1 14 increments of 16 240 11110000 16 240 1 14 increments of 16 248 11111000 8 248 1 6 increments of 8 252 11111100 4 252 1 and2 increments of 4 254 11111110 2 254 None increments of 2 255 11111111 1 254 None 1 28 EMM E6 User s Guide Table 1 7 Examples of Class Subnet Masks REVIEW OF ADDRESSING Decimal Binary Available Subnet Host IDs Mask Equivalent Addresses
84. e the arrow keys to highlight the UPDATE FREQ command Press the Shift and keys together or just the key until the desired time frequency appears this number increments decrements in 3 second intervals minimum 3 seconds maximum 99 seconds Press the Return key to set and save the changes to the UPDATE FREQ field 11 4 EMM E6 User s Guide DEVICE STATISTICS SCREEN COMMANDS 11 2 2 Selecting a Network Slot Port When the Device Statistics screen first appears statistics are displayed for Network 1 Slot 1 and Port 1 To view statistics for another Network Slot and Port use the NETWORK X SLOT X or PORT X commands at the bottom of the screen To select a Network Slot or Port 1 Using the arrow keys highlight the NETWORK X SLOT X or PORT X command 2 Press the Shift and keys together or just the key until the desired network slot or port number appears 3 Press the Return key Statistics associated with the selected network slot or port appear 11 2 3 Enabling Ports The ENABLE PORT command lets you enable the port selected in the PORT command You must first use the PORT command to select the desired port To set the PORT ENABLE command 1 Use the arrow keys to highlight the ENABLE PORT command at the bottom of the screen 2 Press the Return key The PORT ADMIN STATUS field displays ENABLE EMM E6 User s Guide 11 5 CHAPTER 11 DEVICE STATISTICS SCREEN 11 2 4 Disabling Ports
85. er describes how to attach Local Management console to the EMM E6 and lists the setup and configuration requirements for e console terminal console cable e console cable connections 4 1 CONFIGURING YOUR TERMINAL The following instructions outline how to configure your console terminal to communicate with Local Management Refer to your specific terminal manual for more instructions if necessary To access Local Management for the EMM E6 you need either e aVT200 or VT300 series terminal e aPC emulating a VT200 or VT300 series terminal To access the Setup Directory on a VT series terminal press F3 The following table lists the required terminal setup for a VT series terminal EMM E6 User s Guide 4 1 CHAPTER 4 ATTACHING CONSOLE Table 4 1 Terminal Setup Display Setup Menu Columns gt 80 Columns Controls gt Interpret Controls Auto Wrap gt Auto Wrap SGtollz ts eH rnt tate gt Jump Scroll Text gt Cursor Cursor Style gt Underline Cursor Style General Setup Menu gt 00 7 Bit Controls ID number gt VT320ID or VT100ID Cursor Keys gt Normal Cursor Keys Power Supply gt UPSS DEC Supplemental Communications Setup Menu T
86. erview and Setup Guide Cabletron Systems Bridge Router Interface Module Guide s Cabletron Systems Repeater Interface Controller Media Interface Modules TPRMIM FORMIM CXRMIM Installation Guide Cabletron Systems Remote LANVIEW Windows Network Control Management for the Cabletron Systems Station Software User s Manual Cabletron Systems Router Services Manuals EMM E6 User s Guide 1 35 2 REQUIREMENTS CONFIGURATIONS This chapter contains general networking guidelines Before attempting to install the EMM E6 or any additional EPIMs or BRIMs review the requirements and specifications outlined in this chapter Your network installation must meet the conditions guidelines specifications and requirements included in this chapter to ensure satisfactory performance of this equipment Failure to follow these guidelines may produce poor network performance 2 1 NETWORK REQUIREMENTS Take care in planning and preparing the cabling and connections for your network The quality of the connections the length of cables and other conditions of the installation play critical roles in determining the reliability of your network Refer to sections below that apply to your specific network configuration EMM E6 User s Guide 2 1 CHAPTER 2 REQUIREMENTS CONFIGURATIONS 2 1 1 10BASE T Twisted Pair Network When connecting a IOBASE T segment at of the IOBASE T hub ports or a IOBASE T Ethernet P
87. es for additional information e Ifyou enter an invalid password the ignores the entry and the cursor returns to the beginning of the password entry field e After entering a valid password an associated access level flashes across the bottom of the screen and then the Feature Selection Screen Figure 5 2 appears Entering 10 incorrect passwords in a row causes an access NOTE violation In such an event the EMM E6 disconnects from the network and requires a reset to continue operation EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 FEATURE SELECTION COMMUNITY NAME TABLE IP ADDRESS ASSIGNMENT COMPONENT TRAP TABLE SNMP TOOL SUPPORT MIB NAVIGATOR ROUTER SETUP DEVICE STATISTICS EXIT LIM SERVICE Figure 5 2 Feature Selection Screen 5 2 EMM E6 User s Guide 3 Usethe arrow keys to highlight an option and press Return or simply use the corresponding Function key The selected screen appears If you do nothing on LM for 15 minutes the Password Screen reappears At this point you must re enter the password to continue using EMM E6 Local Management EMM E6 User s Guide 5 3 6 COMMUNITY NAMES The Community Name Table option lets you set Local Management community names These names act as passwords to LM and provide security for your EMM E6 You can control EMM E6 access by establishing up to four different levels of security authorization basic read only rea
88. es a frame on Channel A it goes through the same bridging functions as any of the other channels In addition the EMM E6 incorporates IEEE 802 3 repeater logic to repeat Channel A frames In other words e the EMM E6 bridges for all attached devices and provides Ethernet repeating functions for Channel A modules e even if the EMM E6 does not bridge the Channel A traffic it receives it still repeats the information back out onto the Ethernet A Channel 1 12 EMM E6 User s Guide ETHERNET CHANNELS D E and F 1 4 2 Ethernet Channels and The Cabletron Systems MultiChannel family of MIMs includes the Repeater Interface Controller Media Interface Module RIC MIM an IEEE 802 3 compliant multi port repeater You can configure these modules to operate on either the Ethernet Channels B or C or as a standalone repeater using hardware jumpers or management software RIC technology provides the option of connecting multiple RIC MIMs over one common bus This single bus connection allows multiple RIC MIMs communicating over an inter RIC bus to act as a single logical repeater For example An Ethernet frame follows a path from one RIC MIM to the inter RIC bus to another RIC MIM e The RIC MIM retimes and regenerates the frame before transmitting it to all ports Using this configuration yields a path cost equivalent to only one repeater hop Since the limit of serially linked repeaters in an Ethernet network is
89. ess that you enter A natural Subnet Mask is a logical separation between network and host identifiers within the IP address The EMM E6 allows you to modify this mask to best suit your needs The Subnet Mask defines how your EMM E6 treats SNMP trap IP destination addresses in its Trap table see Chapter 8 Trap Table Screen for additional information on traps Using the Subnet Mask the EMM E6 logically determines one of two possible locations either on or not on its own subnet for each trap IP destination address in its trap table If the address is on its own subnet the EMM E6 transmits directly to the workstation with that address If the address is not on its subnet the EMM E6 transmits to the workstation with that IP address combined with the default gateway router MAC address Use the natural Subnet Mask when e workstations in the Trap table reside on a different subnet 1 across a gateway or external router and you want these workstations to receive SNMP traps e EMM E6 provides a natural subnet mask that fits your host network identifier scheme Modify the natural Subnet Mask when e workstations in the Trap table reside on a different subnet 1 across a gateway or external router and you want these workstations to receive SNMP traps EMM E6 User s Guide 7 5 CHAPTER 7 CONFIGURATION SCREEN e EMM E6 does NOT provide a natural Subnet Mask that fits your host network identifier scheme Ma
90. ess the Return key 7 8 ENABLING PORTS The Port ENABLE Override function provides a fail safe recovery when you cannot enable the chassis with remote inband SNMP To use the Port ENABLE Override 1 Use the arrow keys to highlight the Port ENABLE Override field 2 Press the Return key The adjacent field displays ENABLE ALL PORTS Y N 3 Enter Y to enable all of the ports or N to discontinue the port enable override Responding with a Y enables all ports 4 Press the Return key EMM E6 User s Guide 7 9 8 TRAP TABLE SCREEN As an SNMP compliant device the EMM E6 can authenticate an SNMP request The Trap Table defines the management stations to receive SNMP Traps for alarm event notification 8 1 ACCESSING THE TRAP TABLE SCREEN To access the Trap Table Screen 1 Fromthe Features Selection Screen use the arrow keys to highlight the Component Trap Table option 2 Press the Return key The Trap Table Screen Figure 8 1 appears EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 TRAP TABLE SNMP Community Name Trap IP Address 132 177 118 24 132 177 118 25 132 177 118 26 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SAVE COMMUNITY NAMES IPTABLE SNMPTOOLS CLI RETURN F6 F7 F8 F9 F10 Figure 8 1 Trap Table Screen EMM E6 User s Guide 8 1 CHAPTER 8 TRAP TABLE SCREEN 8 2 TRAP TABLE SCREEN FIELDS The Trap Table contains three modifiable fields The fields shown in Figu
91. et the Console port s baud rate The OFF position sets the baud rate to 9600 The ON position sets the baud rate to 2400 Switch 6 Forced Download Changing the state of this switch 1 moving the switch from one position to another clears download information from NVRAM and forces the EMM E6 to download an image file from the station acting as the EMM E6 s BOOTP server Do NOT change the state of Switch 6 unless you NOTE have a station acting as a BOOTP server and that station contains the EMM E6 image file intend to set up a station to act as a BOOTP server for the EMM E6 3 4 EMM E6 User s Guide SETTING MODE SWITCHES After changing the state of Switch 6 and repowering the device the will request a new image until it either receives the image or you reset the EMM E6 again by using the reset button on the front panel removing the EMM E6 from the chassis backplane and plugging it back in cycling the power After resetting the EMM E6 the device attempts to locate a BOOTP server again However the BOOTP request times out after about one minute and the EMM E6 boots from FLASH memory e Switch 7 Non Volatile Random Access Memory Reset The EMM E6 uses NVRAM to store user entered parameters such the IP address device name etc Changing the state of this switch i e moving the switch from one position to another and executing a reset of the module resets these p
92. fficiency as the servers An Ethernet media type which consists of a core of electrically conductive material surrounded by several layers of insulation and shielding An identification which allows a specific level of access to the network device Similar to a password a Community Name acts to restrict access to control capabilities and network statistics A network device which allows multiple network ports in one location to share one physical interface to the network An estimation or measure of the utilization of a network typically expressed as a percentage of theoretical maximum utilization of the network The physical connection of cabling or other media to network devices The coupling of media to the network EMM E6 User s Guide GL 3 Console to Decryption Console Cross Over Crosstalk CSMA CD Data Data Loop DB15 DB9 Decryption GL 4 See Terminal A length of multi stranded cable in which the transmit wire s of one end is are crossed over within the cable to connect to the receive wire s of the other end Cross Overs are used to connect devices to like devices ensuring that transmit and receive connections are properly made A corruption of the electrical signal transmitted through a Shielded or Unshielded twisted pair cable Crosstalk refers to signals on one strand or set of strands affecting signals on another strand or set of strands Carrier Sense Multiple Access with Collision
93. g identifying and setting the EMM E6 mode switches adding replacing optional modules i e Single In line Memory Modules and Ethernet Port Interface Modules identifying BRIM connector locations installing the EMM E6 into a Multi Media Access Center MMAC connecting your device to a network NOTE For information on how to install an optional BRIM refer to your specific BRIM documentation EMM E6 User s Guide 3 1 CHAPTER 3 INSTALLATION 3 1 UNPACKING THE EMM E6 Unpack the EMM E6 as follows Observe all anti static precautions when handling sensitive electronic equipment 1 Remove the shipping material covering the EMM E6 2 Verify the contents of the packing carton The carton is shipped with the following items Item Quantity EMM E6 1 Firmware Image 1 Grounding Strap 1 RJ45 Adapter Kit 1 Release Notes 1 3 Carefully remove the module from the shipping box Leave the module in its non conductive bag until you are ready to install it 4 Visually inspect the module If there are any signs of damage contact Cabletron Systems Technical Support immediately 5 Place the static grounding strap properly on your wrist before opening the non conductive bag 6 Open the non conductive bag by tearing the black and yellow tape seal Do not cut the bag open as damage to the module could 7 Perform a second visual inspection of the module 3 2 EMM E6 User s Guid
94. hange to access any other channel 1 4 4 Ethernet Channel D Ethernet Channel D is provided by one of the two redundant EPIM ports on the front panel of the EMM E6 These ports provide the capability for the use of a variety of Ethernet transmission media connections including twisted pair fiber optic and thick or thin Ethernet coaxial cable Either one of the EPIM ports can act as the bridge port to the external network When the EMM E6 is first powered up the 1 port acts as the bridge port and the EPIM 2 port is off Using the network management capabilities of the EMM E6 you can reverse this configuration to have the EPIM 2 port act as the primary bridge port EMM E6 User s Guide 1 15 CHAPTER 1 INTRODUCTION Only one EPIM operates at any given time However using both EPIM slots in a redundancy configuration ensures that if the primary bridging port fails or the connecting cable segment becomes inoperable the backup port automatically takes over the bridging operation This is referred to as Front Panel Redundancy As it does for Channels B and C the EMM E6 only bridges 1 it does not repeat Channel D traffic When the EMM E6 receives a frame destined for Channel D it goes through the normal bridging process for that frame and filters forwards the information accordingly 1 5 CHANNELS E AND F The EMM E6 provides interfaces for two optional Bridge Router Interface Modules BRIMs These modules pro
95. he Network ID Any time the term host is found in the DDN format example address it indicates a Host ID field which may be assigned by the network manager EMM E6 User s Guide 1 23 CHAPTER 1 INTRODUCTION Table 1 2 Class A Range of Network IDs Binary translation of first octet 1 126 host host host 1 octet for the Network ID 127 reserved 0000001 01111111 first bit is always 0 Range for the Host ID net 1 254 1 254 1 254 3 octets for the Host ID allows 16 777 214 hosts per network Table 1 3 Class B Range of Network IDs 128 191 1 254 host host 2 octets for the Network ID Binary translation of first octet 1000000 10111111 first bit is always 1 and second is always 0 Range for the Host ID net net 1 254 1 254 2 octets for the Host ID allows 65 534 hosts per network Table 1 4 Class C Range of Network IDs 192 223 1 254 1 254 host 3 octets for the Network ID Binary translation of first octet Range for the Host ID 1100000 11011111 first and second bits always 1 and third is always 0 net net net 1 254 1 octet for the Host ID allows 254 hosts per network 1 24 EMM E6 User s Guide REVIEW OF ADDRESSING 1 10 3 Identifying IP Address Classes In the event that you have an existing IP address and need to quickly determine what fields are av
96. he name into the field maximum 32 characters 3 Press the Return key 4 Repeat steps 1 to modify any other community names 5 Usethe arrow keys to highlight the Save command at the bottom of the screen and press the Return key The message SAVED OK appears The EMM E6 saves the community names in memory and implements their access modes If you exit without saving a NOT SAVED message appears above the SAVE command If you proceed to exit without saving you lose all edits 6 To exit the screen use the arrow keys to highlight Return and then press the Return key The Feature Selection Screen appears EMM E6 User s Guide 6 3 7 CONFIGURATION SCREEN In the EMM E6 Configuration Screen you can assign an IP address and Subnet Mask to the EMM E6 You can also e set the Default Interface e set the Default Gateway e override locked ports e enable all ports 7 1 ACCESSING THE CONFIGURATION SCREEN To access the Configuration Screen 1 From the Features Selection Screen use the arrow keys to highlight the IP Address Assignment option and press the Return key The Configuration Screen Figure 7 1 appears EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 CONFIGURATION CHANNEL IPADDRESS SubNET MASK MAC ADDRESS 134 204 12 91 255 255 0 0 00 00 10 07 50 0 0 0 0 0 0 0 0 0 00 00 1D 07 50 0F 0 0 0 0 0 0 0 0 00 00 1D 07 50 10 0 0 0 0 0 0 0 0 00 00 1D 07 50 11 0 0 0 0 0 0 0 0 00 00 1
97. ice which acts as the source or destination of data on the network EMM E6 User s Guide Hot Swap Hub IANA IEEE IETF Image File Impedance In Band Interface Internet Inter operability IP EMM E6 User s Guide Hot Swap to IP Hot Swap capability indicates that a product is capable of being removed from an operating modular chassis and reinserted or replaced without requiring that the chassis and all associated modules be powered down See Modular Chassis Internet Assigned Numbers Authority An agency which assigns and distributes IP addresses Institute of Electrical and Electronic Engineers A standards making body Internet Engineering Task Force standards making body Software instruction code which is downloaded to an intelligent network device See also Firmware A measure of the opposition of electrical current or signal flow in a length of cable Performed through the operating network architecture Refers most commonly to management functions See also Out of Band A connection to a network Unlike a port an interface is not necessarily an available physical connector accessible through the front panel of a device Interfaces may be used as backplane connections or may be found only in the internal operation of a module All ports are interfaces but not all interfaces are ports A world wide network which provides access through a vast chain of private and public LANs
98. ion 1 Telnet to a device by typing telnet followed by pressing the Return key The telnet gt prompt will appear 2 At the telnet gt prompt enter open and the IP address of the device followed by pressing the Return key 1 telnet gt open 123 231 213 132 3 The following messages will appear Trying 123 231 213 132 Connected to 123 231 213 132 Password 4 Enter your password at the Password prompt and press the Return key For security reasons the password does not display when typed The password that you use is specific to the MIB that you are accessing 5 The MIB Navigator prompt MIBNav gt appears and you have access to the MIB Navigator commands 13 2 EMM E6 User s Guide MIB NAVIGATOR COMMAND SET OVERVIEW 13 3 MIB NAVIGATOR COMMAND SET OVERVIEW There are three categories of commands in the command set e Navigation Commands Allows the user to access and manage the MIB for the device running the MIB Navigator Some of commands also provide user community string information The commands are as follows branch cd ctron dir get Is mib2 next pwd set show su tree whoami Built In Commands Allows the user to access and manage network devices connected to the device running the MIB Navigator The commands are as follows arp defroute netstat ping snmpbranch snmpget snmpset snmptree traceroute Special Commands Allows the user to
99. ion of a packet CRC ERRORS Displays the number of packets with bad Cyclic Redundancy Checks CRC that have been received from the network The CRC is a 4 byte field in the data packet that ensures that the transmitted data that is received is the same as the data that was originally sent ALIGNMENT ERRORS Displays the number of errors due to misaligned packets Misaligned packets contain a non integral number of bytes i e some bytes contain fewer than 8 bits 11 2 EMM E6 User s Guide DEVICE STATISTICS SCREEN COMMANDS RUNT PACKETS Displays the number of runt packets received from the network A runt packet is less than the minimum Ethernet frame size of 64 bytes not including preamble GIANT PACKETS Displays the number of giant packets receivedfrom the network A giant packet is greater than the maximum Ethernet frame size of 1518 bytes not including preamble PORT ADMIN STATUS Displays the administrative status of the port selected The two possible status messages are Enable or Disable PORT SEG STATUS Displays the segmentation status of the port selected The two possible status messages are Segmented or Unsegmented The EMM E6 automatically partitions problem ports or interfaces those having 32 consecutive collisions and re connects non problem segments to the network 11 2 DEVICE STATISTICS SCREEN COMMANDS The Device Statistics screen provides several commands that allow you to access and manipulate vario
100. ke sure to modify the Subnet Mask option in conjunction with the Default Gateway option To modify the Subnet Mask 1 Use the arrow keys to highlight the appropriate Subnet Mask field 2 Enter the Subnet Mask in this field in the format of XXX XXX XXX XXX with XXX ranging from 0 to 255 3 Press the Return key 4 Repeatsteps 1 3 for each interface you want to modify The IP Address Table now contains Subnet Mask information specific to your network 7 5 SETTING DEFAULT GATEWAY AND INTERFACE The Default Gateway is the IP address of the network connection 1 gateway or another external router used in forwarding management information from the EMM E6 e g SNMP traps to a network management station The Default Interface is the channel that the EMM E6 uses to access the Default Gateway Make sure to set the Default interface to reflect the correct interface channel for the Default Gateway The Default Gateway field will not allow itself to be modified until a Default Interface has been correctly configured on the EMM E6 7 6 EMM E6 User s Guide SETTING DEFAULT GATEWAY AND INTERFACE To set the Default Gateway and its associated Default Interface 1 Use the arrow keys to highlight the Default Interface field Enter the interface number of the EMM E6 for the Default Gateway in this field The interface number will be a value between 1 and 6 A table of the interface numbers may be found in section
101. key The Device Statistics screen Figure 11 1 appears EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 DEVICE STATISTICS NETWORK PORT 1 BYTES RECEIVED 3792125 67960 FRAMES RECEIVED 16547 255 FRAMES FILTERED 0 0 FRAMES TRANSMITTED ERRORS RECEIVED COLLISIONS OOW COLLISIONS CRC ERRORS ALIGNMENT ERRORS RUNT PACKETS GIANT PACKETS 0 PORTADMIN STATUS ENABLE PORT SEG STATUS UNSEGMENTED ENABLE PORT DISABLE PORT UPDATE FREQ 3 Sec NETWORK A SLOT 1 PORT 1 RETURN Figure 11 1 Device Statistics Screen EMM E6 User s Guide 11 1 CHAPTER 11 DEVICE STATISTICS SCREEN 11 14 DEVICE STATISTICS This section describes Device Statistics screen data fields BYTES RECEIVED Displays the number of bytes received FRAMES RECEIVED Displays the number of frames received FRAMES FILTERED Displays the total number of frames filtered FRAMES TRANSMITTED Displays the total number of frames transmitted ERRORS RECEIVED Displays the total number of errors received COLLISIONS Displays the number of collisions received OOW COLLISIONS Displays the number of Out Of Window collisions OOW collisions are usually caused by The network being so long that the round trip propagation delay is greater than 51 2 us the collision domain is too large a station somewhere on the network violating Carrier Sense and transmitting at will or a cable somewhere on the network failing during the transmiss
102. l loss due to the fiber optic cable in line splices and fiber optic connectors Typical loss for a splice and connector together equals 1 dB or less Network propagation delay is the amount of time it takes a packet to travel from the sending device to the receiving device Total propagation delay for the entire network must not exceed 25 6 us in one direction 51 2 us round trip If the total propagation delay exceeds 25 6 us you must use bridges Length If you meet all system budgets the maximum single mode fiber optic cable length can reach 5 km 3 1 miles with bridges at each segment end However IEEE 802 3 FOIRL specifications specify a maximum of 1 km 1093 6 yards EMM E6 User s Guide 2 5 CHAPTER 2 REQUIREMENTS CONFIGURATIONS 2 1 4 Thin net Network When connecting a thin net coaxial segment to your hub via an EPIM C ensure your network meets the following requirements e Cable Type Use only 50 ohm RG 58A U type coaxial cable for thin net cable segments Length The thin net segment must not exceed 185 meters Terminators Terminate each end of a thin net segment e Connectors You can use up to 29 T connectors throughout the length of the cable segment for host connections If you use an excessive number of barrel connectors within the cable segment e g finished wall plates with BNC feed throughs you may need to reduce the number of host connections For special network design contact Ca
103. l the SIMMs NOTE The LDRAM SIMM slot is shipped with an expansion SIMM located in it If you are performing an upgrade to LDRAM ensure that the upgrade SIMM is placed in the proper SIMM slot after removing the existing LDRAM SIMM LDRAM SIMM modules placed in the lower SDRAM slot will not provide additional main memory For further information on the uses and types of memory in the EMM E6 please refer to Chapter 1 3 6 EMM E6 User s Guide SIMM UPGRADES Local Dynamic Random Access Memory LDRAM SIMM Slot p FLASH Memory SIMM Slot A s Direction of ges O Shared Dynamic Random Access Memory SDRAM SIMM Slot Figure 3 2 SIMM Slot Locations EMM E6 User s Guide 3 7 CHAPTER 3 INSTALLATION 3 3 2 Installing SIMMs Installing a SIMM is a simple two step process After finding the proper SIMM slot location refer to Figure 3 3 and the following instructions to install your SIMM SIMM Slot Connector Teeth Figure 3 3 Installing a SIMM To install a SIMM Observe all anti static precautions when handling sensitive electronic equipment 1 Insert the SIMM between the connector teeth the SIMM slot 2 Pivot SIMM back until it locks into the clips in the SIMM slot and the SIMM holes fit over the SIMM slot posts 3 8 EMM E6 User s Guide ADDING REPLACING 3 4 ADDI
104. le 1 6 for subnet masking forms the Network Manager decides that due to the extent of subnetting to be implemented the last option in the subnet table is not realistic as that configuration offers only two subnets Likewise the first three options are unacceptable as they would create an excessively large number of subnets with relatively few individual hosts per subnetwork This leaves decimal masks of 248 31 subnets 6 hosts each 240 15 subnets 14 hosts each and 224 6 subnets 30 hosts each Any of these decimal masks would support the number of Host IDs to be configured Looking ahead the Network Manager realizes that adding Host IDs to a full network can involve a total reconfiguration of subnet strategies and opts for the decimal mask 240 which provides room for the configuration of 210 Host IDs On any subnet one Host ID must be reserved for a connection to the router s which will interconnect multiple subnets After taking time to fully plan and delineate the required subnets assign them to departments within the company plan out the initial Host IDs for existing devices within those subnets and configure the router s which will interconnect the various subnets the Network Manager determines where on the network the network management station will reside The IP Host ID of this network management station will be essential when configuring the network devices for sending SNMP Traps EMM E6 User s Guide 1 31 CHA
105. led TERM to the ON position 6 to internally terminate the thin net segment at the port the OFF position O if you do not want the thin net segment to internally terminate at the port 2 If the Internal Termination Switch is in the On position connect the thin net segment directly to the BNC port 3 Ifthe Internal Termination switch is in the Off position a Attach a BNC T connector to the BNC port on the module b Attach the thin net segment to one 1 of the female connectors the T connector Failure to terminate each T connector segment may result in improper segment operation Place a terminator on any open female connection on the T connector c Attach another thin coaxial segment or a terminator to the other female connector on the T connector Connecting a thin net segment to earth ground at more than one point could produce dangerous ground currents EMM E6 User s Guide 3 25 CHAPTER 3 INSTALLATION When internal termination switch is set to off O Connect BNC T connector to port Attach a terminator or terminated thin net segment to one female connector of tee connector Connect a terminated thin net segment to other female connector of T connector Attach thin net segment directly to BNC connector when internal termination switch is set to on e Figure 3 14 The EPIM C 3 26 EMM E6 User s Guide CONNECTING THE NETWORK 3 9 5 Connecting an AUI Cable to an EPIM A
106. light the SAVE command 9 Press the Return key The message SAVED OK appears If you exit without saving you lose all edits 10 Exit the screen by either pressing the appropriate Function key to go directly to the desired LM screen or by using the arrow keys to highlight the desired LM screen or the RETURN command and then pressing the Return key Using the RETURN command takes you back to the Feature Selection Screen The designated workstations if properly configured and utilizing SNMP compliant remote management software will now receive SNMP traps from the EMM E6 EMM E6 User s Guide 8 3 9 SNMP TOOLS SCREEN This section describes specific commands and features within the SNMP Tools screen This screen allows you to access management information bases MIBs and varies according to your level of security access The following descriptions outline the super user management capabilities From SNMP Tools you can e review specifics about object identifiers OIDs e edit configurable OIDs view OIDs sequentially from the originally requested OID 9 1 ACCESSING THE SNMP TOOLS SCREEN To access the SNMP Tools Screen 1 From Features Selection Screen use the arrow keys to highlight the SNMP Tool Support option 2 Pressthe Return key The SNMP Tools Screen Figure 9 1 appears EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 SNMP TOOLS COMMUNITY NAME public OID
107. lision It assumes the packet has been sent correctly If the bridge is unable to send the packet to its final destination the original sending station expecting some response from the device it was attempting to contact will time out and depending on the protocol attempt retransmission 1 6 1 Filtering and Forwarding The bridge decides whether to forward or filter a packet based on the physical location of the destination device with respect to the source device A bridge dynamically learns the physical location of devices by logging the source addresses of each packet and the bridge port the packet was received on in a table called the Source Address Table SAT 1 18 EMM E6 User s Guide BRIDGES 1 6 2 Spanning Tree Algorithm The Spanning Tree Algorithm STA is used by bridges to detect data loops duplicate data paths The bridges will then automatically break the loop and use the now open path as a backup in case the primary path fails When bridge is powered up it goes through a series of self tests to check its internal operation During this time the bridge is in a standby or blocking condition and does not forward traffic Also during this standby period the bridge sends out special bridge management packets called configuration Bridge Protocol Data Units BPDU Bridges use the BPDUS as a way of communicating with each other The purpose of the configuration BDPU is to notify other bridges on all of the connected
108. lug a straight through twisted pair cable e g an RS232 cable into the EMM E6 45 COM 2 Port Do not attempt to utilize the COM 1 port for Local NOTE Management as the COM 1 port is intended to be used for monitoring an Uninterruptible Power Supply UPS The method for configuring the COM 1 port for this purpose is described later in this chapter 2 Plug the other end of the RS232 cable into the adapter 3 Connectthe adapter into the device cable and plug the other end of the device cable into the terminal or terminal emulator Detailed descriptions of this process for VT terminals or terminal emulating PCs follow EMM E6 User s Guide 4 3 CHAPTER 4 ATTACHING CONSOLE 4 21 Connecting to a VT Series Terminal To connect a VT Series terminal to a Cabletron module Console port Figure 4 1 1 Connect the RJ45 connector at one end of the cable to the Console port on the Cabletron module 2 Plug the RJ45 connector at the other end of the cable into the RJ45 to DB25 female adapter 3 Connect the DB25 adapter to the port labeled COMM on the VT terminal Figure 4 1 Connecting VT Series Terminal 4 Turnon the terminal and access the Setup Directory Follow the directions in the previous section and set up your VT terminal to match the configuration given in Table 4 1 5 When these parameters are set the Local Management password screen will a
109. mple gt branch 1 3 6 1 2 17 13 4 EMM E6 User s Guide MIB NAVIGATOR COMMAND SET OVERVIEW Navigation Commands cont d cd Use this command to change directories within a MIB subtree The path specified must be valid This command has two special subtree options Moves you to one subtree above the current one Moves you to the root Format cd PATH Example MIBNav gt cd iso org dod internet mgmt The ctron command enables you to change directories directly to the Cabletron MIB 1 3 6 1 4 1 52 without keying in the entire path ctron Format ctron Example MIBNav gt ctron User s Guide 13 5 CHAPTER 13 MIB NAVIGATOR Navigation Commands cont d dir Is Each of these commands displays the contents of a specified sub tree the current directory displays if you do not specify a sub tree Options can be used separately or combined When no option is used the ASCII name of the leaf object displays The three options available with these commands are Displays all instances of the object s OID value 1 3 6 and ASCII leaf object name internet p Displays all entries from the current directory including the object s path name d Displays only directory entries in the tree Format dir Is dir l dir Ipd get Example MIBNav gt dir Example MIBNav gt dir l The get command provides you with the value of a specific managed
110. n Token Ring Topology Transceiver Trap User UTP GL 14 A particular type of frame which informs a station in the Token Ring and FDDI network architectures that it may transmit data for a specified length of time Once that time has expired the station must stop transmitting and pass the token along to the next station in the network A network architecture which requires that stations only transmit data when they have been given permission by the reception of a Token and dictates that stations will receive information at pre determined intervals and in a definite series The physical organization of stations and devices into a network A device which transmits and receives A transceiver provides the electrical or optical interface to the network media and may convert signals from one media for use by another See Alarm Any person who utilizes a workstation or node on the network Anyone who will complain if the network is not operating Unshielded Twisted Pair A type of network media which consists of a number of individual insulated cable strands which are twisted together in pairs EMM E6 User s Guide Numerics OBaseT 3 19 A A Channel 1 12 Address Classes identifying 1 25 Addressing 1 22 ARP B 2 arp 13 11 Attenuation Multimode 2 4 SingleMode 2 5 Twisted Pair 2 3 B B Channel 1 13 Backplane 1 10 Basic read only 1 21 Basic Read 6 2 Baud Rate Default 3 4 BOOTP 3 4 BPDU 1 19
111. network usage is lowest and network stability especially downloads over a WAN link at the time of the planned download Table 15 2 provides a step by step procedure for downloading the firmware image file This section provides specific MIB OIDs their names and the required setting for proper image file download Refer to your specific MIB walking tool documentation for instructions on how to set MIB OID strings The Download OIDs for Cabletron products reside in Cabletron enterprise MIBs group 52 The specific OIDs necessary to perform an image file download reside in the common download group under ctDL Cabletron Download The full OID string to reach this group is 1 3 6 1 4 1 52 4 1 5 8 1 When performing the steps in Table 15 2 keep the following in mind e You must follow the steps in order e Enter the IP address of the tftp server in standard dotted decimal notation e g 132 177 118 24 e Enter the FULL path to the image file in the ctDLTFTPRequest OID including the name of the image file e g c tftpboot EMMEG6 fls 15 8 EMM E6 User s Guide REMOTE RUNTIME DOWNLOAD Table 15 2 Runtime Download Procedure Step OID Name OID Number Data Type SNMP OID Data 1 ctDLTFTPRequestHost 1 3 6 1 4 1 52 4 1 5 8 1 18 0 IP address Enter the IP address of the tftp server 2 ctDLTFTPRequest 3 ctDLOnLineDownload 1 3 6 1 4 1 52 4 1 5 8 1 19 0 1 3 6 1 4 1 52 4 1 5 8 1 16 0
112. networks of the current topology After the bridge has informed the network of its presence the bridge enters a second standby state called listening During listening the bridge monitors the network for the BPDUS of other bridges Having received packets from the networks the bridge enters the learning state continuing to block traffic as it examines the information it receives Based on bridge priorities and MAC addresses the interconnected bridges will set bridge ports to either forwarding or standby conditions allowing a single access path to all parts of the network The bridge or bridges involved in this primary data path will then remain in the forwarding state and the bridges with lower priority involved in the backup path s will remain in a standby condition Any redundant paths those placed in standby will be automatically used as need is detected by the operation of the Spanning Tree Algorithm The other type of BPDU is the topology change BPDU This BPDU is made up of four bytes and notifies the other bridges that a change has taken place Upon receipt of the topology change BPDU the bridges re arbitrate or re span to form a legal topology EMM E6 User s Guide 1 19 CHAPTER 1 INTRODUCTION 1 7 LOCAL MANAGEMENT FEATURES Local Management for the EMM E6 provides tools that allow you to manage the device and its attached segments Through Local Management you can Assign an IP address and subnet mask to the EMM E6 b
113. oad The instructions include command examples where appropriate Bold lettering in examples indicates operator entry If unsure how to properly configure your UNIX workstation using these guidelines contact your Systems Administrator Before you start e Editing ethers or hosts files requires Root Superuser access Downloading an image file requires setting up your UNIX workstation as a reverse address resolution protocol rarp server To set up a UNIX workstation 1 Editthe etc ethers file by adding the EMM E6 MAC address followed by a unique name e g 00 00 1d 32 0c 1b EMME6 EMM E6 User s Guide 15 3 CHAPTER 15 IMAGE FILE DOWNLOAD 2 Editthe etc hosts file by adding the EMM E6 MAC address and follow it with the same unique name you used in step one above e g 00 00 1d 32 0c 1b If you already have a tftpboot directory confirm the rarp setup of your workstation as follows Request a process status and grep for rarpd e g unix ps aux grep rarpd The following information represents a typical output user 161 7 7 1 2 32 184 S 12 00 grep rarpd root 87 0 00 9 48 136 2 5 11 05 rarpd a root 88 0 00 0 24 0 IW 11 05 a The term rarpd a located at the end of the root string indicates is active If rarp is NOT running only the grep process appears 4 If you do NOT have a tftpboot directory then you must create one e g unix mkdir tftpboot
114. of connections between communicating devices that are set up used and then eliminated EMM E6 User s Guide GL 1 Attenuation to BRIM Attenuation AUI Backbone Backplane Bit BOOTP Branch Group Bridge BRIM GL 2 Loss of signal power measured in decibels due to transmission through a cable Attenuation is dependent on the type manufacture and installation quality of cabling and is expressed in units of loss per length most often dB m Attachment Unit Interface A cabling type used in Ethernet networks designed to connect network stations and devices to transceivers A portion of a network which provides the interconnection of a number of separate smaller networks The portion of a modular chassis to which all modules are connected Typically the backplane provide power and management functions to each module and is used to provide networking connections via buses to all modules in the modular chassis Binary Digit A bit is the smallest unit of information consisting of a single binary number A bit is represented by a numerical value of 1 or 0 Bootstrap Protocol Checks MIB variables of a SNMP manageable device to determine to determine wether it should start up using its existing firmware or boot up from a network server specifically configured for the purpose A collection of MIBs related by common function These MIBs are collected into families called branches See also Leaf Object MIB
115. on EPIM port Port s go Configurations where Discuss these configurations with into standby for no apparent reason devices connected across EMM E6 channels can cause the EMM E6 to detect a looped condition Cabletron Technical Support before implementing them into your network 14 6 EMM E6 User s Guide USING THE RESET SWITCH 14 3 USING THE RESET SWITCH The EMM E6 incorporates a recessed reset switch located above the LEDs see Figure 14 1 This reset switch initializes the EMM E6 processor This switch does NOT initialize Non Volatile Random Access Memory NVRAM the non volatile random access memory where the EMM E6 stores network management parameters To use the reset switch use a pen or pencil to press the switch in When this is done the initializes itself EMM E6 User s Guide 14 7 15 IMAGE FILE DOWNLOAD This chapter provides instructions for downloading an image file to the EMM E6 using three different methods altering hardware switch settings to force the module to accept new firmware through UNIX operating System commands and by setting specific MIB OID strings To set OID strings you can use the SNMP Tools screen described in Chapter 9 of this User s Guide or any MIB walking tool Refer to specific MIB walking tool documentation for instructions on how to set MIB OID strings You can also download an image file using various remote management packages
116. or MIB navigation from a remote Telnet station Port Locking and LANVIEWSECURE Support The EMM E6 supports Port Locking features and Cabletron s LANVIEWSECURE line of Media Interface Modules MIMs The EMM E6 is capable of configuring and controlling LANVIEWSECURE MIMs through local or remote management These security features can help reduce the possibility of network eavesdropping EMM E6 User s Guide 1 9 CHAPTER 1 INTRODUCTION 1 3 THE MMAC WITH FLEXIBLE NETWORK BUS The Multi Media Access Center with Flexible Network Bus MMAC FNB provides the operational platform for the EMM E6 The MMAC ENB backplane provides two physically separate buses Channel operating over the MMAC Power and Management bus and Channels B and C on the FNB Each of these channels buses allows different MIM types to access the EMM E6 Figure 1 1 These channels buses interconnect through the EMM E6 to provide bridging or routing and management for all MIMs in the MMAC chassis Power amp Management Bus Ethernet A Bus Flexible Network Bus Ethernet B Bus Ethernet C Bus Figure 1 1 MMAC Flexible Network Bus Two types of MMACS currently support FNB architecture shunting and non shunting MMACS equipped with shunting backplanes allow modules operating on Channels B and C to continue communicating with the EMM E6 regardless of whether there is an empty slot or an Ethernet Channel A module between them in the chassis The following t
117. ort Interface Module EPIM T ensure that the network meets the following requirements Length The IEEE 802 3 1OBASE T standard requires that 10BASE T devices transmit over a 100 meter 328 foot link using 22 24 AWG unshielded twisted pair wire However cable quality largely determines maximum link length If you use high quality low attenuation cable it may be possible achieve link lengths of up to 200 meters Cable delay limits maximum link length to 200 meters regardless of the cable type Losses introduced by connections at punch down blocks and other NOTE equipment reduce total segment length For each connector or patch panel in the link subtract 12 meters from the total length of your cable Insertion Loss Between frequencies of 5 0 and 10 0 MHz the maximum insertion loss must not exceed 11 5 dB This includes the attenuation of the cables connectors patch panels and reflection losses due to impedance mismatches in the link segment Impedance Cabletron Systems 1OBASE T Twisted Pair products work on twisted pair cable with 750 to 1650 impedance Unshielded twisted pair cables typically have an impedance of between 85Q and 1100 You can also use shielded twisted pair cables such as IBM Type 1 cable but keep in mind that this cable has an impedance of 1500 The high impedance of the IBM Type 1 cable increases signal reflection However due to cable shielding and its subsequent lack of crosstalk between shielde
118. port Since the EMM E6 is SNMP compliant you can control and monitor the device remotely and locally using different SNMP Network Management packages EMM E6 firmware also supports several RMON groups including e Alarms HostTopN e Events Matrix History Statistics e Host LANVIEW Diagnostic LEDs Cabletron provides a visual diagnostic and monitoring system called LANVIEW with the EMM E6 LANVIEW LEDs can help you quickly identify device port and physical layer problems 1 8 EMM E6 User s Guide EMM E6 FEATURES DLM Support The EMM E6 allows the option of using Cabletron Distributed LAN Monitor DLM software to locally poll and monitor any Simple Network Management Protocol SNMP or Internet Protocol IP device The EMM E6 itself tallies the polling results and can be configured to contact a management station when a predetermined threshold is exceeded This allows the EMM E6 to request management attention when it is required reducing management polling over the network Local Communication Ports The EMM E6 provides two RJ45 serial ports on its front panel The COM 1 port allows a serial management connection to an American Power Conversion Smart Uninterruptible Power Supply UPS The COM 2 port allows you to access Local Management by locally connecting a DEC 220 or VT320 terminal or a PC using VT emulation software In Band Telnet with MIB Navigator EMM E6 firmware supports a management tool which allows f
119. ppear Refer to Chapter 5 Accessing Local Management 4 4 EMM E6 User s Guide CONFIGURING CONSOLE CABLE 4 2 2 Connecting to an IBM PC or Compatible To connect an IBM PC or compatible running VT terminal emulation to a Cabletron module Console port Figure 4 2 1 Connect the RJ45 connector at one end of the cable to the Console port on the Cabletron module 2 Plug the RJ45 connector at the other end of the cable into the RJ45 to DB9 adapter 3 Connect the DB9 adapter to the communications port on the PC Figure 4 2 Connecting an IBM PC or Compatible 4 Turnon the PC and configure your VT emulation package to match the configuration given in Table 4 1 5 When these parameters are set the Local Management password screen will appear Refer to Chapter 5 Accessing Local Management EMM E6 User s Guide 4 5 CHAPTER 4 ATTACHING CONSOLE 4 3 PINOUT DESCRIPTIONS Table 4 2 RJ45 to DB9 Adapter PC Adapter RJ45 DB9 Pin Color Pin Description 1 Blue Receive 5 Green 5 Ground 2 Orange 7 Send Request 6 Yellow 8 Clear to Send Table 4 3 RJ45 to DB25 Adapter VT Series Adapter RJ45 DB25 Pin Color Pin Description Red Transmit Blue Receive Yellow Clear to Send Green Ground Orange Terminal Ready 4 4 CONFIGURING A UPS CABLE To configure an Uninterruptible Power Supply UPS cable 1 Plug a straight through
120. r s Guide V UNITED STATES GOVERNMENT RESTRICTED RIGHTS The enclosed product a was developed solely at private expense b contains restricted computer software submitted with restricted rights in accordance with Section 52227 19 a through d of the Commercial Computer Software Restricted Rights Clause and its successors and c in all respects is proprietary data belonging to Cabletron and or its suppliers For Department of Defense units the product is licensed with Restricted Rights as defined in the DoD Supplement to the Federal Acquisition Regulations Section 52 227 7013 c 1 11 and its successors and use duplication disclosure by the Government is subject to restrictions as set forth in subparagraph c 1 i1 of the Rights in Technical Data and Computer Software clause at 252 227 7013 Cabletron Systems Inc 35 Industrial Way Rochester New Hampshire 03867 vi EMM E6 User s Guide TABLE OF 5 CHAPTER 1 INTRODUCTION 1 1 USING THIS 440 02001 1 1 1 2 EMM E6 FEATURES 1 sees 1 4 1 3 THE WITH FLEXIBLE NETWORK BUS 1 10 1 4 ETHERNET CHANNELS B C D E and F 1 12 1 4 1 Ethernet Channel A 1 12 1 4 2 Ethernet Channels and 1 13 1 4 8 Other FNB 1 14 1 4 4 Ethernet Channel
121. ransmit gt Transmit 9600 gt gt XOFFat64 gt 8bits Parity ave dts gt No Parity Stop gt 1 Stop Bit Local Echo gt Local Echo gt DEC 423 Data Leads Only Transmit sus gt Limited Transmit Auto Answerback gt Auto Answerback Keyboard Set up Menu IKOyS ead den gt Typewriter Keys Auto Repeat gt option option Margin Bell gt Margin Bell Warning Bell gt Warning Bell 4 2 EMM E6 User s Guide CONFIGURING CONSOLE CABLE 4 2 CONFIGURING A CONSOLE CABLE This section outlines the proper cable configurations for connecting the EMM E6 to a Local Management terminal For information on the appropriate pinouts refer to Appendix A of this User s Guide You need the following hardware supplied with your EMM E6 to connect the EMM E6 to a terminal e an RS232 cable e adapter e adevice cable The adapter you use depends on whether you connect to LM from a VT series terminal or a VT emulating PC Read the information included with the cable kit to make sure you are using the right adapter To configure the cables 1 P
122. re The Bridge operates at the Data Link level of the OSI model It stores packets and based on the packet destination address forwards or filters the packets Because bridges work at layer 2 of the OSI model bridges are protocol independent A bridge must read the complete data frame check for errors and make forward or filter decisions based on recognized addresses stored in its source address table 7 Application 6 Presentation 5 Session 4 Transport 3 Network 2 Data Link 1 Physical Figure 1 2 OSI Model EMM E6 User s Guide 1 17 CHAPTER 1 INTRODUCTION The bridge is considered a node on the network and performs store and forward functions for packets on each network This contrasts with a repeater which repeats the signal bit by bit from one side of the network to the other The bridge actually reads each packet checks the packet for accuracy then decides whether the packet should be sent to the other network based on the destination address If the other network is busy it is the responsibility of the bridge to store the packet for a reasonable time until the transmission can be made The bridge is also responsible for handling collisions If a collision happens as the bridge is transmitting onto the second network the bridge is responsible for the back off and retransmission process The original sending node is not made aware of the col
123. re 8 1 allow the user to direct trap information to users on the network The three fields are SNMP Community Name Displays the community name associated with the network management station IP address to which the EMM E6 sends trap messages Traps Displays whether or not the EMM E6 sends traps to the network management station with the associated IP address Trap IP Address Indicates the IP address of the workstation to receive trap alarms from the EMM E6 8 3 CONFIGURING THE TRAP TABLE 1 Using the arrow keys highlight the SNMP Community Name field 2 Enter the community name that reflects the desired access level e g the community name associated with the SUPER USER access level for SNMP trap information While any of the community names can be used by the Trap station Network Management functions are best performed by a station with Super user access to the EMM E6 3 Press the Return key 4 Using the arrow keys highlight the Traps field and enter Y to send alarms from the EMM E6 to that workstation or N to prevent the EMM E6 from sending alarms to that workstation 5 Press the Return key 8 2 EMM E6 User s Guide CONFIGURING THE TRAP TABLE 6 Using the arrow keys highlight the desired Trap IP Address field 7 Enter the IP address of the workstation to which you want the EMM E6 to send traps Use the XXX XXX XXX XXX format with the value of XXX ranging from 0 to 254 8 Using the arrow keys high
124. res SQE Refer to your DTE manual for SQE requirement information To connect an EPIM X to a device not requiring SQE 1 Verify that the SQE LED on the EPIM X is off If the SQE LED is on set the position of the SQE switch to off If the SQE light remains on even though the SQE switch is in NOTE the OFF position contact Cabletron Technical Support 2 Attach one end of an AUI cable no longer than 50 meters in length to the port located on the EPIM X Figure 3 12 and the other end to the intended node ON Position Toward Back of EPIM OFF Position Toward Front of EPIM Figure 3 12 The EPIM X EMM E6 User s Guide 3 21 CHAPTER 3 INSTALLATION 3 9 3 Connecting to an EPIM F1 F2 or EPIM F3 When connecting a fiber optic link segment to an EPIM F1 F2 or EPIM F3 keep the following in mind When connecting a fiber optic link segment with SMA 906 connectors to an EPIM F1 with SMA ports make sure each connector uses half alignment NOT full alignment sleeves A full alignment sleeve damages the receive port SMA 905 NOTE connectors do not need alignment sleeves When connecting a fiber optic link segment with ST connectors to 3 22 an EPIM F2 with ST ports keep in mind that ST connectors attach to ST ports much like BNC connectors attach to BNC ports Insert the connector into the port with the alignment key on the connector inserted into the alignment slot on the port Turn the connec
125. ridge via the Configuration Screen menu Select a default gateway and default interface Control EMM E6 local and remote access by establishing Community Names Designate which Network Management Workstations receive SNMP traps from the EMM E6 Navigate through Management Information Bases MIBs Since the EMM E6 is an SNMP compliant device you can manage related SNMP MIB objects given the appropriate security level You can also manage the IETF Bridge MIB objects and many of the RMON Remote Monitoring MIB objects Other management capabilities include enabling and unlocking all managed ports in the Multi Media Access Center MMAC chassis 1 20 EMM E6 User s Guide COMMUNITY NAMES 1 8 COMMUNITY NAMES When using Local or Remote Management tools to access the EMM E6 it is important that the Network Manager has the ability to maintain network security Community Names provide some network security by acting as passwords into the device and the software running it The Network Manager Super user controls access by establishing four 4 passwords Each of these passwords is associated with a specific level of access to the Local Management capabilities of the EMM E6 The Community Names are set through the Local Management Community Name Table Once these are set by the Network Manager they can be maintained in confidence or limited to users who have a need to manage the system The four levels of access are e Super User
126. rief descriptions of some of the recurrent terms in the main text as well as related terms used in discussions of the relevant networking discussions These descriptions are not intended to be comprehensive discussions of the subject matter For further clarification of these terms you may wish to refer to the treatments of these terms in the main text Words in the glossary description text listed in boldface type indicate other entries in the glossary which may be referred to for further clarification 10BASE 2 10BASE FL 10BASE T Alarm Application Architecture ATM IEEE standard which governs the operation of devices connecting to Ethernet thin coaxial cable IEEE standard which governs the operation of devices connecting to Ethernet fiber optic cable Supersedes previous FOIRL standard IEEE standard which governs the operation of devices connecting to Ethernet Unshielded Twisted Pair UTP cable A notification generated by the operation of SNMP which is sent to a management station to indicate a problem with the network or warn of an error condition 1 A software operation performed by a workstation or other network node 2 A layer of the OSI Model A collective rule set for the operation of a network Architectures describe the means by which nodes transmit and receive information in the network See also Ethernet Topology Asynchronous Transfer Mode A networking architecture that is based on the use
127. rop prevention described above Ports set to Full security mode will not see or respond to these types of packets The default setting for Full security is disabled Enabling the Full security function modifies the broadcast and multicast packets LANVIEWSECURE is enabled upon the locking of a channel module or port When enabled the first two addresses that are learned become the expected addresses associated with that port on any LANVIEWSECURE module If a port has never been enabled and a MAC address is added to that port then any MAC address learned on that port will be deleted automatically If a port is enabled and a new address is added to that port then any existing addresses remains in the expected address table 1 34 EMM E6 User s Guide GETTING HELP 1 13 GETTING HELP If you need additional support related to installation configuration or management of the EMM E6 or if you have any questions comments or suggestions concerning this manual contact Cabletron Systems Technical Support By phone 603 332 9400 Monday Friday 8am 8pm ET By CompusServe GO CTRON from any prompt By Internet mail support ctron com 1 14 RELATED MANUALS Use the following manuals to supplement the procedures and other technical data provided in this manual This manual references procedures in these manuals where appropriate but does not repeat them Cabletron Systems MMAC Ov
128. s 3 10 EMM E6 User s Guide PRE INSTALLATION TEST 3 6 PRE INSTALLATION TEST Before installing the EMM E6 in a live network test the module in a controlled situation to ensure that it is repeating and bridging packets You can perform this test with two workstations see Figure 3 6 using an MMAC FNB or MMAC MENB installed with an EMM E6 and a Media Interface Module MIM as follows 1 Install the EMM E6 and any MIM e g TPMIM THN MIM CXRMIM FORMIM etc into a non networked MMAC 2 Connect the first workstation to an EMM E6 EPIM or BRIM 3 Connect the second workstation to the MIM using the appropriate cable or transceiver 4 Assign the EMM E6 a valid IP address through Local Management 5 Designate the first workstation as a file server and the second one as the client refer to the workstation manuals for establishing one as a file server and one as a client EMM E6 User s Guide 3 11 CHAPTER 3 INSTALLATION 6 Send packets between the two workstations to verify the proper operation of the EMM E6 Note If using UNIX workstations a ping test verifies the EMM E6 is operating properly MMAC M3FNB Figure 3 6 Pre Installation Test 3 12 EMM E6 User s Guide INSTALLING THE EMM E6 3 7 INSTALLING THE EMM E6 Installing the EMM E6 into any MMAC hub is an easy operation and requires no special skills or tools Howe
129. s e CPU LED flashing indicating proper EMM E6 operation STBY A B C D LEDs ON or OFF depending on the port s position in the Spanning Tree Algorithm Appropriate EPIM BRIM LEDs ON see section 3 9 Connecting to the Network to obtain the appropriate LED status for individual EPIMs refer to individual BRIM Guides ON LED lit for the active channel D If the LEDs are not operating in the fashion described above refer immediately to Chapter 14 Troubleshooting EMM E6 User s Guide 3 15 CHAPTER 3 INSTALLATION 3 8 INSTALLATION CHECK OUT After connecting to the network verify that packets can pass over the network segments via the EMM E6 Again you can use two workstations set up as file server and client Keep the server workstation stationary in the wiring closet with the EMM E6 and use the client workstation to move to each node connected to the EMM E6 See Figure 3 9 1 After the is installed in the connect the server workstation to either a MIM or to the EMM E6 via an or BRIM 2 Going to each node connected to the MMAC connect the client workstation and test the segment If a failure occurs refer to Chapter 14 Troubleshooting 3 16 EMM E6 User s Guide INSTALLATION CHECK OUT MMAC M3FNB with EMM E6 and TPRMIM
130. s These OIDs are needed for products supporting multichannel connectivity fnbconnect Description Denotes the connection status of the CSMA CD board to the inter RIC bus Object Identifier 1 3 6 1 4 1 52 1 6 1 2 2 1 1 2 slot Data Type Integer Values 1 Channel 2 Channel 4 Channel A Access Policy read write fnbPortConnectPortAssignment Description Provides the capability to change or query the specific interface that the port is assigned Object Identifier 1 3 6 1 4 1 52 1 6 1 2 3 1 1 3 slot port Data Type Integer Values 1 Channel A 2 Channel B 3 Channel C Access Policy read write B 12 EMM E6 User s Guide OID HASHING ON SOURCE ADDRESES 9 OID HASHING ON SOURCE ADDRESES The following OID allows the enabling and disabling of DEC hashing which may be necessary or desired in DECnet and mixed IEEE 802 3 DECnet environments rptrSrcAddrMgmtHashType Description This enables and disables DECnet hashing on source addresses which is useful in DECnet environments Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 1 5 3 4 0 Data Type Integer Values 1 NoDECnetHashing 2 DECnetHashing Access Policy read write B 10 REMOTE DOWNLOADING For detailed step by step instructions on the use of OIDs for forcing a remote download of firmware instruction code to the EMM E6 please refer to Image File Download Chapter 15 of the main text EMM E6 User s Guide B 13 GLOSSARY This glossary provides b
131. s is associated usually at manufacture with a specific interface Megabits Per Second Mbps indicates the number of groups of 1000 bits of data that are being transmitted through an operating network Mbps can be roughly assessed as a measure of the operational speed of the network EMM E6 User s Guide Media MIB Tree Micron u MIM Mission Critical Modular Chassis Module Multichannel Multimode Nanometer Media to Nanometer Physical cabling or other method of interconnection through which network signals are transmitted and received Management Information Base A database of data related to a specific management or manageable network device which may be viewed or modified through SNMP commands The MIB Tree 1s the collection of all MIBs that can be used to monitor or control a network device MIB Trees are made up of several branch groups which lead to leaf objects or MIBs A micrometer one millionth of a meter Media Interface Module See also Module Vital to the operation of a network company or agency A device which provides power cooling interconnection and monitoring functions to a series of flexible and centralized modules for the purposes of creating a network or networks A discrete device which is placed in a modular chassis to provide functionality which may include but is not limited to bridging routing connectivity and repeating Modules are easily installed an
132. sabled for this port address violation it can be enabled by setting rptrPortMgmtAdminState Default state is enabled 2 Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 9 1 1 6 Data Type Integer Values 1 disable 2 enable Access Policy read write rptrPortSecurityFullSecEnabled Description A port that is set to full security and is locked will scramble all packets which are not contained in the expected source address list including broadcasts and multicasts A port that is set to partial security will allow broadcast and multicasts to repeat unscrambled Default state disabled 1 Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 9 1 1 7 Data Type Integer Values 1 disable 2 enable Access Policy read write EMM E6 User s Guide B 5 APPENDIX B COMMONLY USED OIDs 4 ENABLING amp DISABLING SNMP TRAPS The EMM E6 supports the collection and reporting of SNMP Traps of several types and at several levels SNMP Trap sending may be enabled or disabled for the following trap types segmentation link and source addressing The traps may be enabled on the network level module level or port level B 4 1 Enabling Network Level SNMP Traps The next three OIDs control traps enable and disable at the network level or channel level rptrHwTrapsSetLink Description Enables and disables link traps for this network 1 Channel A B or C Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 1 6 1 1 Data Type Integer Val
133. self from the other segments if 32 consecutive collisions occur or the collision detector of a segment is on for longer than approximately 2 4 ms This FAULT protection will reset automatically after one packet is transmitted onto the FAULT protected segment without causing a collision A 2 EMM E6 User s Guide A 3 COM 1 PORT Type Standard RJ45 port Pin 1 Transmit Data XMT From COM 1 port 2 Data Set Ready DSR To COM 1 port 3 Not used 4 Receive Data RCV To COM 1 port 5 Signal Ground GND 6 Data Terminal Ready DTR From COM 1 port 7 Notused 8 Notused 4 COM 2 PORT Type Standard RJ45 port Pin 1 Transmit Data XMT From COM 2 port 2 Data Set Ready DSR To COM 2 port 3 Not used 4 Receive Data RCV To COM 2 port 5 Signal Ground GND 6 Data Terminal Ready DTR From 2 port 7 Notused 8 Not used A 5 ENVIRONMENTAL REQUIREMENTS Operating Temperature 5 to 40 C 41 to 104 F Non operating Temperature 30 to 90 C 22 to 194 F Operating Humidity 5 to 95 non condensing EMM E6 User s Guide A 3 APPENDIX 6 SPECIFICATIONS A 6 SAFETY This unit meets the safety requirements of UL 1950 without D3 deviations CSA C22 2 No 950 and EN 60950 the EMI requirements of FCC Part 15 Class A EN 55022 Class A and VCCI Class I and the EMC requirements of EN 50082 1 including IEC 801 2 ESD levels 1 through 4 IEC 801 3 Radiated Susceptibility levels 1 through 4 and IEC 801
134. ser s Guide THE SECURITY ACCESS LEVEL CYCLES Allows you to specify the number of GET NEXT requests to walk through and how much time elapses between each request REPEAT Repeats the Get command allowing you to monitor any changes to a specific OID 9 3 THE SECURITY ACCESS LEVEL Each MIB component that the EMM E6 supports e g RMON DLM Repeater Rev 4 etc has its own password for each possible level of access ranging from Basic Read Only to Super User Most MIB component community names default to public However some components have specific community names e g depending on what devices reside in the EMM E6 managed hub Repeater Rev 4 uses separate community names for each channel in use channelA channelB and or channelC A complete list of Super User community names also called community strings resides in the Cabletron proprietary chassis MIB The MIB group chCompName provides the names of the MIB components The MIB group chCompSUCommstr provides individual MIB component community names strings The component information corresponds numerically by last digit In other words each instance i e OID element in the chCompName group indicates its match in the chCompSUCommsStr group EMM E6 User s Guide 9 3 CHAPTER 9 SNMP TOOLS SCREEN In order to access a specific MIB s components you must set the appropriate MIB password in the COMMUNITY NAME field The defaul
135. ser s Guide 7 3 CHAPTER 7 CONFIGURATION SCREEN 7 3 SETTING THE HOST IP ADDRESS The table on the Configuration screen allows you to assign an IP address and Subnet Mask to the EMM E6 The Host IP applies to each interface To set the Host IP 1 Use the arrow keys to highlight the IP Address field 2 Enter the IP address into this field The format for this entry is XXX XXX XXX XXX with values for XXX ranging from 0 to 254 The EMM E6 rejects non numerics adjacent dots periods or an entry without dots separating the four XXX values 3 Press the Return key The screen displays the Host IP address and changes any existing Subnet Mask to the default Subnet Mask for the IP address entered 4 Use the arrow keys to highlight the SAVE IPs command 5 Press the Return Key At the resulting prompt typing Y will cause the EMM E6 to reset and load the Host IP changes into NVRAM It takes approximately 35 seconds for the EMM E6 to save NOTE reset The board is inoperable during this time After the EMM E6 resets the password screen appears and you must re enter Local Management If you exit the Configuration Screen without saving you lose all edits 7 4 EMM E6 User s Guide MODIFYING SUBNET 5 7 4 MODIFYING A SUBNET MASK Consult your Network Administrator prior to modifying any of the natural Subnet Masks The EMM E6 automatically enters the natural Subnet Mask for any IP addr
136. sing Local Management describes how to access LM after you attach the management console Chapter 6 Community Names explains how to use the Community Name Table screen to set both local and remote access levels Chapter 7 Configuration Screen describes how to assign IP addresses subnet masks and the default gateway to the EMM E6 This chapter also explains how to enable and disable all ports Chapter 8 Trap Table Screen explains how to designate management stations as recipients of SNMP alarm or event traps Chapter 9 SNMP Tools Screen provides information on the resident EMM E6 Management Information Base MIB walking tool Chapter 10 Router Setup Screen Shows the Routing Services Setup Screen where the EMM E6 s optional Routing Services may be accessed Chapter 11 Device Statistics Screen illustrates the statistics provided by EMM E6 LM This chapter also describes how to enable and disable specific ports on the EMM E6 and set the statistics update frequency time Chapter 12 Command Line Interface Screen shows the Command Line Interface CLI screen This screen will function in future releases of EMM E6 firmware Chapter 13 MIB Navigator provides instructions and examples for using the navigator command set Chapter 14 Troubleshooting details the EMM E6 LANVIEW LEDs that enable you to quickly diagnose network operational problems and provides suggested courses of action for troubleshooting Chapter 1
137. t Object Identifier Data Type Values Access Policy 1 3 6 1 4 1 52 4 1 1 1 4 3 8 1 1 1 4 lt bi gt lt p gt Integer 1 disable 2 enable read write rptrPortGrpSaTrapSetSrcaddr Description Enables and disables source address traps for the specified port group Object Identifier Data Type Values Access Policy EMM E6 User s Guide 1 3 6 1 4 1 52 4 1 1 1 4 3 8 2 1 1 3 lt bi gt lt p gt Integer 1 disable 2 enable read write APPENDIX COMMONL Y USED OIDs B 5 ACTIVATING RMON GROUPS The initial configuration of the EMM E6 at installation does not provide the activation of the RMON Default and Host Groups These management groups may be activated or deactivated through local management using OID Sets As the specific OID used to control each RMON bundle is dependent upon the presence or absence of BRIMs and their type an SNMP Get is necessary to determine the OID instances of the RMON bundles before they may be enabled or disabled chCompName Description Returns OID values for the location of the RMON bundle OIDs in the device being examined These values may be used in conjunction with the chCompAdminStatus OID below to activate and deactivate the individual RMON bundles Object Identifier 1 3 6 1 4 1 52 4 1 1 2 4 1 5 Data Type Integer Access Policy read write chCompAdminStatus Description Enables and disables the RMON Default Group for an EMM E6 Object Identifier Res
138. t exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la class A prescrites dans le R glement sur le brouillage radio lectrique dict par le minist re des Communications du Canada ii EMM E6 User s Guide This equipment is in the Class I Category information equipment to be used in commercial and or industrial areas and conforms to the standards set by the Voluntary Control Council for Interference by Information Technology Equipment VCCI aimed at preventing radio interference in commercial and or industrial areas Consequently when used in a residential area or in an adjacent area thereto radio interference may be caused to radios and receivers etc Read the instructions for correct handling LOH CRMC COT XU Co Ww LE Bt LAB VCCI tio C FERR Erkin LAATAT E 29 gt t LA EAA ET KAARI iet LTF Ea CABLETRON SYSTEMS INC PROGRAM LICENSE AGREEMENT IMPORTANT Before utilizing this product carefully read this License Agreement This document is an agreement between you the end user and Cabletron Systems Inc Cabletron
139. t or connection See also redundant EMM E6 User s Guide GL 5 FDDI to Host FDDI Fiber optics File Fileserver Firmware Flash EEPROM FNB Frame Gateway Heartbeat Hexadecimal Host GL 6 Fiber Distributed Data Interface A high speed networking architecture FDDI requires that stations only transmit data when they have been given permission by the operation of the network and dictates that stations will receive information at pre determined intervals See also Token Network media made of thin filaments of glass surrounded by a plastic cladding Fiber optics transmit and receive information in the form of pulses of light See multimode and single mode A collection of related data A network server device which stores and maintains data files for the use and modification of users on the network The software instructions which allow a network device to function See also Image file See EEPROM Flexible Network Bus A Cabletron backplane design which enables an FNB configured chassis to support multiple network architectures simultaneously A group of bits that form a discrete block of information Frames contain network control information The size and composition of a frame is determined by the network protocol being used A router See SQE A base 16 numerical system Digits in hexadecimal run from 0 to 9 and continue from A to F where F is equivalent to the decimal number 16 A dev
140. t panel also has a reset switch which allows you to re initialize the processor Chapter 14 Troubleshooting provides detailed descriptions of each EMM E6 LANVIEW LED 1 12 LANVIEWSECURE The EMM E6 supports the LANVIEWSECURE suite of Ethernet MMAC modules The LANVIEWSECURE products support both inbound data Intruder Prevention and outbound data Eavesdrop Prevention These products are identified by the words LANVIEWSECURE printed on the faceplate of the product Intruder prevention allows ports on the modules to be configured with expected MAC addresses If a port receives a packet from a station or device whose MAC address does not correspond to the one previously associated with that port the port will automatically lock sensing the presence of an unauthorized station then generate and send a trap to the Network Management station to indicate the intruder violation Eavesdrop prevention delivers a modified data portion filled with a random pattern of binary ones and zeroes to all ports on the module except the port specified in the original packet s destination MAC address field Effectively all ports except the destination port recognize the presence of a packet but receive meaningless information EMM E6 User s Guide 1 33 CHAPTER 1 INTRODUCTION LANVIEWSECURE modules also provide a Full security configuration under which broadcast and multicast packets contain modified data fields such as those used in eavesd
141. t super user password public allows you to access most MIB components To change the SNMP Tools screen COMMUNITY NAME field you must have super user access to Local Management To set the SNMP Tools screen COMMUNITY NAME 1 Use the arrow keys to highlight the field to the right of COMMUNITY NAME 2 Enter the community name necessary for super user access for any specific MIB e g channelA for Repeater Rev 4 MIB 3 Press the Return key The community name changes 9 4 GETTING AND SETTING OIDS To get an OID 1 Highlight GET using the arrow keys 2 Press the Return key lt GET gt OID IF9 appears 3 Enter an OID either by e using the keyboard to enter the OID Save yourself some keystrokes by typing the OID minus the gt OID s prepend i e given OID prepend of 1 3 6 1 you enter 2 1 1 4 0 and the LM gets the MIB II sysContact OID 1 3 6 1 2 1 1 4 0 e pressing F9 to recall an OID already entered and using the keyboard to modify the recalled OID as necessary 9 4 EMM E6 User s Guide GETTING AND SETTING OIDS 4 Press the Return key If there is no instance of that OID the EMM E6 displays MIB NO INSTANCE Otherwise the EMM E6 displays that OID s data type length and value To get the next OID 1 Highlight GETNEXT using the arrow keys 2 Press the Return key lt GETNEXT gt OID IF9 appears 3 Enter the OID 4 Press the Return key If that OID does not exist the E
142. ted cable to ensure attenuation remains within specification EMM E6 User s Guide 2 3 CHAPTER 2 REQUIREMENTS CONFIGURATIONS 2 1 2 Multimode Fiber Optic Network When connecting a multimode fiber optic link segment to the hub via EPIM F1 F2 ensure the network meets the following requirements e Cable Type Use EPIM F1 and EPIM F2 for the following multimode fiber optic media 50 125 um fiber optic cabling 62 5 125 um fiber optic cabling 100 140 um fiber optic cabling e Attenuation You must test the fiber optic cable with a fiber optic attenuation test set adjusted for an 850 nm wavelength This test verifies that the signal loss in a cable falls within the following acceptable levels 13 0 dB or less for a 50 125 um fiber cable segment 16 0 dB or less for a 62 5 125 um fiber cable segment 19 0 dB or less for a 100 140 um fiber cable segment Budget and Propagation Delay When you determine the maximum fiber optic cable length to incorporate fiber runs into your network you must calculate and consider the fiber optic budget a total loss of 10 0 dB or less is permissible between stations and total network propagation delay To determine the fiber optic budget combine the optical loss due to the fiber optic cable in line splices and fiber optic connectors Typical loss for a splice and connector together equals 1 dB or less Total propagation delay allowed for the entire network must not exceed 2
143. th the IEEE and DEC Spanning Tree algorithms allowing it to operate in several fault tolerant bridging environments Available Routing Services Cabletron s own routing services for the EMM E6 are available as a software upgrade When properly configured with the software upgrade the EMM E6 is capable of routing IP IPX DECnet AppleTalk and OSPF Special Filtering Database The EMM E6 supports a special filtering database which allows packets to be blocked from crossing the bridge based on manager defined parameters Six Port Ethernet Bridge The EMM E6 has six Ethernet ports Three of these ports Ethernet Channels A B and C operate within the hub One other port Ethernet Channel D provides an external connection through one of two Ethernet Port Interface Modules EPIMs located on the EMM E6 faceplate The remaining two ports Ethernet Channels E and F are externally accessible through the use of Cabletron Bridge Router Interface Modules BRIMs which can be configured in the module Integrated BRIM Technology In addition to Ethernet Channels A through D the EMM E6 provides management for up to two optional Bridge Router Interface Modules BRIMs These modules allow for additional Ethernet connections or Fiber Distributed Data Interface FDDI network backbones The following lists optional BRIMs For current information on the available BRIM modules supported by the EMM E6 please refer to the Release Notes shipped with
144. the module or contact Cabletron Systems EMM E6 User s Guide 1 5 CHAPTER 1 INTRODUCTION BRIM E6 Ethernet module with selectable EPIM connection CRBRIM W E IP Cisco Router Ethernet Wide Area module for TCP IP traffic CRBRIM W E DESKTOP Cisco Router Ethernet Wide Area module for IP IPX DECNet and AppleTalk traffic CRBRIM W E ENT Cisco Router Ethernet Wide Area module for all standard Cisco protocols All CRBRIM W E products provide two WAN interfaces and one NOTE internally connected Ethernet interface The Ethernet connection is provided through the use of an EPIM 3PS which is included with the purchase of the CRBRIM W E product 0 100 Mbps FDDI Dual Attached Station DAS Media Interface Connector MIC connection for multimode fiber optic media BRIM F5 100 Mbps FDDI DAS MIC connection for single mode fiber optic media BRIM F6 100 Mbps FDDI Dual Attach Station connection with configurable connectors The BRIM F6 uses FDDI Port Interface Modules FPIMs The FPIMs allow a media flexibility for FDDI connections by providing connector and media types meeting several ANSI standards The following FPIM types are currently available 1 6 FPIM 00 MultiMode Fiber Physical Media Dependant MMF PMD compliant multimode fiber optic MIC connector FPIM 02 Twisted Pair Physical Media Dependant TP PMD complaint Unshielded Twisted Pair RJ45 connector FPIM 04 TP PMD compliant Shielded Twisted
145. the board If the board does not re initialize it has probably failed Call Cabletron Technical Support STBY Yellow Indicates Network Management has A B C D packets will not placed the EMM E6 in a Standby be forwarded as Standby condition a data loop the Spanning condition exists Tree Algorithm has put the Check with your Network corresponding Administrator to find out if the Bridge Port into EMM E6 was placed in a standby mode Standby on purpose due to detecting a data loop If a Data loop does exist condition reconfigure the network to remove the data loop RCV Yellow LED flashes to If none of the receive LEDs is A B C D indicate that a flashing the EMM E6 is not Receive segment is receiving frames on any of the receiving a segments frame Check that each module is firmly installed in the MMAC Ensure that all connected ports are enabled 14 2 EMM E6 User s Guide USING LANVIEW Table 14 1 LANVIEW LEDs Continued Error Condition LED Color Description Recommended Action XMT Green LED flashes to If none of the transmit LEDs is A B C D indicate that a flashing the EMM E6 is not Transmit segment is transmitting frames on any of transmitting a the segments frame Contact Cabletron Technical If not connected Support for assistance to the LAN the LED flashes every two seconds to indicate it is transmitting BPDU frames CLN Red Collision Excessive flashing or a solid Collision
146. the board level Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 2 5 1 1 1 3 bit Data Type Integer Values 1 disable 2 enable Access Policy read write rptrPortGrpSaTrapSetSrcaddr Description Enables and disables segmentation traps for the specified port group at the board level Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 2 5 1 1 2 lt b gt Data Type Integer Values 1 disable 2 enable Access Policy read write B 4 3 Enabling Port Level SNMP Traps The next three OIDs are for traps enable and disable at the port level The bit value is the number of the module in chassis to be examined This number will be based on the location of the module in the chassis For detailed descriptions of the location numbering scheme in your MMAC chassis please refer to your MMAC User s Guide Likewise the lt p gt value is the assigned number of the individual port on that module which SNMP Traps will be enabled or disabled for Port numbers may be determined by examining the faceplate of the module where they are clearly printed B 8 EMM E6 User s Guide ENABLING amp DISABLING SNMP TRAPS rptrPortHwTrapSetLink Description Enables and disables link traps for this port Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 8 1 1 1 3 lt b gt lt p gt Data Type Integer Values 1 disable 2 enable Access Policy read write rptrPortHwTrapSetSeg Description Enables and disables segmentation traps for this por
147. the module and from the ends of the connectors on each fiber strand On the EMM E6 attach the fiber labeled 1 to the applicable receive port labeled RX Figure 3 13 On the EMM E6 attach the fiber labeled 2 to the applicable transmit port labeled TX At the other end of the fiber optic cable attach the fiber labeled 1 to the transmit port of the device and the fiber labeled 2 to the receive port EMM E6 User s Guide 3 23 CHAPTER 3 INSTALLATION F1 F2 SMA 906 Connectors w Half Alignment Sleeves ST Connectors Figure 3 13 The EPIM FI F2 and EPIM F3 5 Check that the LNK LED on the applicable module port is on If the LED is not on perform each of the following steps until it is a Check that the device at the other end of the link is powered b Verify proper cross over of fiber strands between the applicable port on the module and the fiber optic device at the other end of the fiber optic link segment c Verify that the fiber connection meets the dB loss specifications outlined in Fiber Optic Network Requirements Chapter 2 If you still cannot establish link contact Cabletron Technical Support 3 24 EMM E6 User s Guide CONNECTING TO THE NETWORK 3 9 4 Connecting a Thin Net Segment to an EPIM C To connect a thin net segment to an EPIM C 1 Setthe Internal Termination Switch Figure 3 14 located above the port when the has been inserted into the EMM E6 and labe
148. ti Channel Initial 48 Users 48 Users an MMAC an MMAC FNB an IRM2 an EMM E6 two 24 port MIMs two 24 port RIC MIMs Channel C 48 Users An Additional 48 Users Require 48 Users an additional MMAC two additional an additional IRM2 24 port RIC MIMs two additional 24 port MIMs an external bridge S Channel Channel 48Users 48 Users 48 Users Y Another Additional 48 Users Require 48 Users an additional MMAC two additional an additional IRM2 24 port two additional non RIC MIMs 24 port MIMs an external bridge ChannelA Channel B Channel C 48 Users 48 Users 48 Users 48 Users I 48 Users Figure 2 3 Adding New Users To place additional users on a new network with an EMM E6 you only need to add a few additional MIMs to the MMAC FNB EMM E6 User s Guide 2 11 CHAPTER 2 REQUIREMENTS CONFIGURATIONS 2 5 4 AFault Tolerant Wiring Hierarchy The example in Figure 2 4 illustrates a fault tolerant wiring hierarchy Figure 2 4 Configuring a Fault Tolerant Wiring Scheme Closets 1 2 and 3 each contain an with an EMM E6 MIMs and RIC MIMs operating on Ethernet channels A B and C Within each closet each Ethernet channel is separately repeated and each is dedicated to a specific set of network
149. tor to lock it down The physical communication link consists of two strands of fiber optic cabling the Transmit TX and the Receive RX The Transmit strand from a module port connects to the Receive port of a fiber optic Ethernet device at the other end of the segment 1 TX of the applicable port on the module goes to RX of the other fiber optic device The Receive strand of the applicable port on the module connects to the Transmit port of the fiber optic Ethernet device i e RX of the applicable port on the module goes to TX of the other fiber optic device EMM E6 User s Guide CONNECTING THE NETWORK We recommend that you label the fiber optic cables to indicate Receive and Transmit ends Cabletron Systems prelabels its cable At one end of the cable one fiber is labeled 1 and the other fiber 1s labeled 2 This pattern repeats at the other end of the cable If you did not purchase your cable from Cabletron Systems be sure to label your cable in this manner Do not touch the ends of the fiber optic strands and do not let the ends come in contact with dust dirt or other contaminants Contamination of cable ends causes problems in data transmissions If necessary clean contaminated cable ends using alcohol and a soft clean lint free cloth To connect a fiber optic link segment to an EPIM FI F2 or an 1 Remove the protective plastic covers from the fiber optic ports on the applicable port on
150. try to force the module into place or use the knurled knobs to draw the module into the backplane Forcing a misaligned module into place can damage the EMM E6 or the MMAC backplane MMAC M8FNB EMM E6 Chassis Slots 1 and 2 Knurled Knobs Figure 3 7 Installing the EMM E6 5 Secure the module to the MMAC chassis by tightening the knurled knobs If you do not tighten the knurled knobs vibration can cause the module to lose contact with the backplane and disrupt your network 7 Re install the MMAC chassis safety bars 6 Power up the MMAC if it isn t already ON It takes several minutes for the EMM E6 to boot up While NOTE booting the EMM E6 displays boot up diagnostics on Local Management Refer to Chapters 4 and 5 for additional information on how to connect and configure a Local Management console 3 14 EMM E6 User s Guide INSTALLING THE EMM E6 7 Observe the status of the LANVIEW LEDs on the EMM E6 When the CPU LED is flashing the STBY standby LEDs indicate the module s boot state During this period up to 5 minutes the LEDs cycle through a series of internal diagnostics See Figure 3 8 EMM E6 RESET cpu o o 4 tc DC BA ss Figure 3 8 EMM E6 LANVIEW LEDs 8 Afterthe system boot procedure the LEDs should be in the following condition
151. ts in the device MIBs Management Information Bases MIBs are databases of objects used for managing the device and determining your EMME s configuration The commands within the MIB Navigator allow you to view and modify a device s objects The MIB Navigator views the MIB tree hierarchy as a directory Figure 13 1 Each layer is numerically encoded so that every branch group and leaf object in the MIB is identified by a corresponding number known as an Object Identifier OID This allows the MIB Navigator to navigate through the MIB and access the manageable leaf objects i ___ Object 1 1 1 Group 1 1 Object 1 1 2 bject 1 2 1 Root 1 Group 1 2 1 2 2 Object 1 3 1 Group 1 3 Object 1 3 2 Figure 13 1 Hierarchical MIB Tree Structure Often an ASCII name is assigned to a leaf object s OID making it more readable To identify the value for the object Forwarding you would use the OID 1 3 6 1 2 1 4 1 or its ASCII name 1so org dod internet mgmt mib 2 ip ipForwarding EMM E6 User s Guide 13 1 CHAPTER 13 MIB NAVIGATOR 13 2 ACCESSING THE MIB NAVIGATOR The MIB Navigator function resides on your Cabletron device EMM E6 ETWMIM ESXMIM etc Access the MIB Navigator in band through a device i e workstation connected to the same network or internetwork using a Telnet connection To access the MIB Navigator perform the following actions from a PC or workstat
152. tuta dedic eti EN A 4 A 7 PHYSICAL PROPERTIES eee A 4 A 8 EPIM T 10BASE T TWISTED PAIR PORT 5 9 EPIM F1 F2 MULTIMODE FIBER OPTIC PORT A 6 10 EPIM F3 SINGLE MODE FIBER OPTIC PORT A 7 ATT EPIM C BNG PORT iiiter te tti cea A 9 A 12 EPIM A AND EPIM X AUI A 10 APPENDIX B EMM E6 OIDs B 1 SPANNING TREE PROTOCOL esee B 1 B 2 CONFIGURING ARP REQUEST PACKETS B 2 B 3 PORT GROUP B 3 4 ENABLING amp DISABLING SNMP TRAPS B 6 B 4 1 Enabling Network Level SNMP Traps B 6 B 4 2 Enabling Module Level SNMP Traps B 7 4 3 Enabling Port Level SNMP B 8 B 5 ACTIVATING RMON GROUPS B 10 B 6 eiat tie ep e nete uius B 11 B 7 TRUNK PORT B 11 B 8 CHANNEL SELECTION sss B 12 B 9 OID HASHING ON SOURCE ADDRESES B 13 B 10 REMOTE DOWNLOADING eem B 13 EMM E6 User s Guide Xi 1 INTRODUCTION Welcome to the Cabletron Systems EMM E6 User s Guide This manual explains how to set up configure and locally manage the Cabletron Systems 6 port Ethernet Bridge Management Module
153. twisted pair RS232 cable into the EMM E6 RJ45 COM 1 Port 2 Plug the other end of the RS232 cable into the adapter PN 9372066 and connect the adapter to the UPS 3 Set COM 1 in the LM Configuration screen to UPS Refer to Chapter 7 Configuration Screen for additional information regarding UPS connection 4 6 EMM E6 User s Guide 5 ACCESSING LOCAL MANAGEMENT With your terminal properly configured and the correct physical cable connections in place you can access the Local Management interface To access Local Management 1 Turn the terminal on and press the Return key The EMM E6 Password Screen Figure 5 1 appears EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 Cabletron Systems Incorporated 35 Industrial Way PO Box 5005 Rochester NH 03867 0505 U S A 603 332 9400 c Copyright Cabletron Systems Inc 1994 EMM E6 960 F W Version 0 00 00 Boot PROM Version 00 00 00 EMM E6 960 Board Rev 00 00 00 Enter USER PASSWORD Figure 5 1 EMM E6 Password Screen EMM E6 User s Guide CHAPTER 5 ACCESSING LOCAL MANAGEMENT 2 Enter your Password and press Return The default Super User access password is the Return key which defaults internally to public Your password is one of the community names specified in the Community Name Table Access to certain LM capabilities depends on the degree of access accorded that community name See Chapter 6 Community Nam
154. ude access to security protected fields requiring a higher level of authorization read only read write or super user READ ONLY This allows for extended read only access to EMM EO6 LM fields and excludes access to security protected fields of read write or super user authorization READ WRITE This allows you to read and write to EMM E6 LM fields excluding fields security protected for super user access only SUPER USER This access status gives the user read write access to the EMM E6 LM and allows changes to be made to all modifiable parameters including community names IP addresses traps and SNMP objects 6 2 EMM E6 User s Guide ESTABLISHING COMMUNITY NAMES 6 3 ESTABLISHING COMMUNITY NAMES In order for any Community Name Table edits to take effect you must have super user access In other words when you log into LM you must do so with a super user password password from any of the other levels of access basic read read only or read write does not allow you to edit the Community Name Table Screen Any community name assigned in the Community Name Table is a password to its corresponding level of LM access These names are case sensitive The community name assigned super user access is the only one that gives you complete access to LM Remember this name Establishing community names Usethe arrow keys to highlight the Community Name field adjacent to the access level of your choice 2 Enter t
155. ues 1 disable 2 enable Access Policy read write rptrHwTrapsSetSeg Description Enables and disables segmentation traps for this network 1 e Channel A B or C Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 1 6 1 2 Data Type Integer Values 1 disable 2 enable Access Policy read write B 6 EMM E6 User s Guide rptrSaTrapSetScraddr ENABLING amp DISABLING SNMP TRAPS Description Enables and disables source address traps for this network 1 e Channel A B or C Object Identifier Data Type Values Access Policy 1 3 6 1 4 1 52 4 1 1 1 4 1 6 2 1 Integer 1 disable 2 enable read write B 4 2 Enabling Module Level SNMP Traps The next three OIDs are for traps enable and disable at the board level The lt b gt value is the number of the module in the MMAC chassis to be examined This number will be based on the location of the module in the chassis For detailed descriptions of the location numbering scheme in your MMAC chassis please refer to your MMAC User s Guide rptrPortGrpHwTrapSetLink Description Enables and disables link traps for the specified port group at the board level Object Identifier Data Type Values Access Policy EMM E6 User s Guide 1 3 6 1 4 1 52 4 1 1 1 4 2 5 1 1 1 2 lt b gt Integer 1 disable 2 enable read write APPENDIX B COMMONLY USED OIDs rptrPortGrpHwTrapSetSeg Description Enables and disables segmentation traps for the specified port group at
156. uipment Corp 1960 is a trademark of Intel Corp AppleTalk is a registered trademark of Apple Computer Inc Ethernet is a trademark of Xerox Corp CompuServe is a registered trademark of CompuServe Inc Printed on recycled paper ug EMM E6 User s Guide This device complies with Part 15 of the FCC rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation NOTE This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment uses generates and can radiate radio frequency energy and if not installed in accordance with the operator s manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference at his own expense WARNING Changes or modifications made to this device which are not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment DOC NOTICE This digital apparatus does no
157. ult of above SNMP Get Data Type Integer Values 7 disable 3 enable Access Policy read write B 10 EMM E6 User s Guide BRIDGING 6 BRIDGING The following OID is used to enable and disable the interface for the bridging function dotidstpPortEnable Description The enabled disabled status of the port Object Identifier 1 3 6 1 2 1 17 2 15 1 4 Data Type Integer Values 1 enable 2 disable Access Policy read write B 7 TRUNK PORT SECURITY The following OID is required if security is not desired on a trunk port The user must force the port to be a trunk port before locking the port via the module or channel Failing to do this will cause the port to become locked out when the third address is seen on the trunk port rptrPortSrcAddrForceTrunk Description When this object is set to Force it places the port into a Trunk topology state whether or not the network traffic warrants such a state When this object is set to NoForce it allows the port to assume the topological state it would naturally assume based on the network activity across it When read this object reports the current setting Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 5 1 4 Data Type Integer Values 1 NoForce 2 Force Access Policy read write EMM E6 User s Guide B 11 APPENDIX B COMMONLY USED OIDs B 8 CHANNEL SELECTION The following two OIDs are needed to select channel assignments A B or C for all boards or individual port
158. ur Repeater Media Interface Modules TPRMIM FORMIM CXRMIM Installation Guide EMM E6 User s Guide 2 7 CHAPTER 2 REQUIREMENTS CONFIGURATIONS 2 4 PORT ASSIGNMENT MODULES e 20 22 twisted pair port and bank assignment repeater MIM RJ45 connectors TPXMIM 20 has nine TPXMIM 22 has twenty one one EPIM e TPXMIM 32 TPXMIM 36 twisted pair port and bank assignment repeater MIM RJ71 connectors TPXMIM 32 has one TPXMIM 36 has two one EPIM CXRMIM TPRMIM 36 TPXMIM 22 SN SN 10BASE 2 10BASE T ETHERNET ETHERNET ETHERNET D D CD Figure 2 1 Sample Repeater MIMs 2 8 EMM E6 User s Guide SAMPLE NETWORK CONFIGURATIONS 2 5 SAMPLE NETWORK CONFIGURATIONS This section provides you with several examples for configuring networks with the EMM E6 These examples illustrate the flexibility and advantages to using the EMM E6 and RIC MIM technology 2 5 1 2 5 2 2 5 3 2 5 4 2 5 5 Three networks with a single MMAC FNB The EMM E6 as a multi port router Adding users to an existing network A fault tolerant wiring scheme The EMM E6 and BRIMs EMM E6 User s Guide 2 9 CHAPTER 2 REQUIREMENTS CONFIGURATIONS 2 5 1 Three Networks With a Single MMAC FNB One of the basic applications of the EMM
159. urpose Example Class B NetID Host ID rm gm m 132 177 118 24 Subnet Mumba Host Number EMM E6 User s Guide 1 25 CHAPTER 1 INTRODUCTION Subnet addresses when used with routing allow discrimination between devices and groups of devices based on IP addresses Networks of different subnets even those on the same physical network segment may be isolated from a functional standpoint from one another through the implementation of routing Repeaters bridges and switches which operate at the Data Link layer of the OSI model make their decisions based on MAC addresses Network devices such as routers servers and client stations can use IP addressing to recognize transmissions intended for them If a station on one routed subnet sees a transmission from another subnet it will ignore the packet without concern over who it is intended for To overcome this subnetwork blindness a router is used Any station or device which implements subnet masking needs to be configured with an address for that subnet s Default Gateway When the station or device transmits packets intended for a different subnetwork than the one it identifies itself as belonging to the transmission is also sent to the Default Gateway where the gateway or router will make the determination of where the packet is sent The use of subnet addresses on the network means using a Subnet Mask in conjunction with each IP address 1 10 5 Subnet Masks The
160. us boards and ports This section first gives a brief description of each command and then explains how to use them ENABLE PORT This command lets you enable the selected port DISABLE PORT This command lets you Disable the selected port UPDATE FREQ This command lets you select the time interval between Network Slot Port counter updates You can choose update intervals in increments of 3 seconds with the maximum interval being 99 seconds EMM E6 User s Guide 11 3 CHAPTER 11 DEVICE STATISTICS SCREEN NETWORK This command lets you select the network you want to monitor The choices range from A to F depending on the configuration of your network and the options available from this configuration For example if you do not have a Media Interface Module running on the A Channel the EMM E6 automatically disallows Channel A as a network selection SLOT This command lets you select the MMAC hub slot that you want to monitor The choices vary depending on the MMAC chassis you use The far right slot is always slot number one 1 PORT This command lets you select and view port statistics for ports 1 through 26 of the device residing in the selected Slot 11 2 1 Selecting an Update Frequency The EMM E6 updates the Device Statistics screen every three seconds by default The EMM E6 allows you to adjust this frequency in intervals of three seconds maximum frequency is 99 seconds To adjust the UPDATE FREQ 1 2 Us
161. ver when you install your device keep the following in mind Any installation operations should be performed only by qualified personnel You must install the slots 1 and 2 furthest slots to the right of the MMAC chassis e Position RIC MIMs contiguously any MMAC FNB series hub from right to left This ensures that the channels do not act in a stand alone manner or desegment from the B or C channel This does not apply to shunting MMAC FNBs where the data path remains unbroken and allows non interrupted communication Install the EMM E6 into the MMAC FNB backplane as follows CCCCCCCCS We recommend powering down your MMAC when inserting or removing boards even though Cabletron Systems modules have hot swap capabilities 1 Remove the safety bars which protect the chassis and remove any module to be replaced or blank MMAC slot covers in accordance with the installation and removal procedures for these items 2 Holding the EMM E6 by the edges of the board align the bottom and top edges of the board with the slot guides Make sure that both the bottom and top edges of the card rest in the guide slots 3 Slide the EMM E6 Figure 3 7 into slots 1 and 2 furthest right slots of the MMAC card cage Make sure that the module aligns properly in the top and bottom slot guides EMM E6 User s Guide 3 13 CHAPTER 3 INSTALLATION 4 Firmly press the module connections into the backplane Do not
162. vide the EMM E6 with additional connectivity for either bridging or routing functions At the same time BRIMs provide access to various transmission methods As bridging modules BRIMs perform the same functions as EPIMs they transfer packets between different channels However unlike EPIMs BRIMs bridge these packets from one transmission type to another e g Ethernet to FDDI 1 16 EMM E6 User s Guide BRIDGES 1 6 BRIDGES An Ethernet bridge is a device that allows the expansion of a network beyond the limitations of the IEEE 802 3 specified limits for repeated Ethernet networks If an Ethernet network has a repeater hop of four repeaters or a round trip propagation delay near the 51 2 us maximum a bridge can be used to build an extended network Ethernet bridges read in packets and decide to filter or forward based on the destination address of the packet The simple forward filter decision process allows a bridge to segment traffic between two networks keeping local traffic local This process increases the availability of each network while still allowing traffic destined for the opposite side of the bridge to pass Bridges can also connect similar networks together such as Ethernet Token Ring and Fiber Distributed Data Interface FDDI together Note that similar networks means that the upper five layers of the OSI model see Figure 1 2 are the same but that different Data Link and Physical layers may be used by the architectu
163. y discrete electronic item connected to a network which either transmits and receives information through it facilitates that transmission and reception or monitors the operation of the network directly Distributed LAN Monitor DLM is a feature of some SNMP management devices which allows that device to locally monitor other devices under its control and report to a central network management station any noted errors This frees the network management station from directly monitoring every SNMP device Desktop Network Interface DNI cards are devices which are added to workstations to provide them with a connection to a network NIC Electronic Erasable Programmable Read Only Memory A security process which encodes raw data into a form that cannot be utilized or read without decryption Ethernet Port Interface Module EPIMs are added to specifically designed slots in Cabletron Ethernet products to provide connections to external media EPIMs allow a great flexibility in the media used to connect to networks A networking architecture which allows any station on the network to transmit at any time provided it has checked the network for existing traffic waited for the network to be free and checked to ensure the transmission did not suffer a collision with another transmission See also CSMA CD The ability of a design device or network to operate at full or reduced capacity after suffering a failure of some essential componen

Cabletron Systems EMM-E6 Ethernet User's Manual

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