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3Com 3C16894 4-slot Chassis Switch User Manual

1. P MAAA 1 2 3 4 1 SFP port 2 SFP port LED 3 Ethernet port 4 Ethernet port LED Table 36 describes the 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T module LEDs Table 36 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T Module LEDs LED Description LINK ACT Off The port is not operating On The port is operating Green flashing The port is transmitting and receiving data Table 37 lists specifications of the 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T module Table 37 Specifications for the 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T Module Specification Description CPU MPC8241 BootROM 512 KB SDRAM 64 MB Dimensions L x W 366 7 x 340 mm 14 5 x 13 4 in Power consumption 35 W Connector RJ 45 LC Table 37 Specifications for the 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T Module continued Specification Description I O Modules 29 Number of ports Transmission rate Cable and maximum transmission distance Compliance 16 1000 Mbps full duplex optical electrical 10 100 Mbps half full duplex electrical Category 5 twisted pair with maximum transmission distance of 100 m 328 ft IEEE 802 3 IEEE 802 3u IEEE 802 3z IEEE 802 3ab IEEE 802 1p IEEE 802 1Q IEEE 802 1D IEEE 802 1X IEEE 802 1s IEEE 802 1w IEEE 802 3x
2. Table 22 describes the 48 port 10 100BASE T FE PoE Module LEDs Table 16 module LED LED Description LINK ACT Green The port is connected Off The port is not connected Green flashing Data is being transmitted or received Table 23 describes the specifications for the 48 port 10 100BASE T FE PoE module Table 17 Specifications for the 48 port 10 100BASE T FE PoE Module Specification Description CPU MPC8241 BootROM 512 KB SDRAM 128M Dimensions L X W 366 7 x 340 mm 14 4 x 13 4 in Maximum power consumption 35 W Connector RJ 45 Number of ports 48 16 CHAPTER 1 SWITCH 7750 COMPONENTS 48 port 10 100 1000BASE T PoE Module Table 17 Specifications for the 48 port 10 100BASE T FE PoE Module continued Specification Description Port transmission speed Cables and maximum transmission distance Maximum power each port provides Compliance 10 100 Mbps half full duplex MDI MDI X auto sensing 100 m 328 ft 15 4 W EEE802 3 EEE802 3u EEE802 3x EEE802 3ad EEE802 1p EEE802 1D EEE802 1Q EEE802 1X EEE802 1s EEE802 1w EEE802 3af The 48 port 10 100 1000BASE T PoE module provides 48 10 100 1000 Mbps auto sensing Ethernet ports that provide a remote power supply to powered devices Figure 12illustrates the 48 port 10 100 1000BASE T PoE module Figure 8 48 port 10 100 1000BASE T PoE Module Figure 13 illustrates the front panel and LEDs of the 48 port 10 100 100
3. After the switch is powered on booting information is displayed on the configuration terminal If the configuration system has failed there is no screen display at the configuration terminal or the displayed characters are illegible If there is no information displayed on the terminal after the Switch 7750 is powered on check that a The power system is working normally a The Fabric is working normally a The console cable has been connected to the console port in the Fabric If this procedure does not reveal the problem verify that the console cable is properly connected and that the configuration terminal is set correctly If the displayed characters are illegible the parameters of configuration terminal may not have been set correctly See Setting Terminal Parameters on page 49 Troubleshooting Power If the Power OK LED is off there may be something wrong with the system power supply Check that m The power module has been installed in the correct position to ensure normal communication with the backplane a The switch power has been turned on a The power cord is connected properly a The source voltage is correct 68 CHAPTER 5 TROUBLESHOOTING Table 50 describes power LEDs on the Fabric continued Table 50 Power LEDs on the Fabric LED Status Description OK On The power is working normally Off The power has failed or has not been installed FAIL On The power has failed Off The
4. Specification Description CPU MPC850 BootROM 512 Kb SDRAM 64 MB Dimensions L x W 366 7 x 340 mm 14 5 x 13 4 in Maximum power consumption 50 W Connector type RJ 45 Number of ports 8 Power Module 33 Table 43 Specifications for the 8 Port 10 100 1000BASE T GE Module continued Specification Description Port transmission speed 10 Mbps half full duplex 100 Mbps half full duplex 1000 Mbps full duplex Cables and maximum 4 100 ohm Category 5 non shielded twisted pairs up to 100 transmission distance m 300 ft Compliance IEEE 802 3ab IEEE802 3 IEEE802 3u IEEE802 3x Power Module Only one AC power module is required for the 4 slot chassis although two power module slots are provided to implement N 1 redundancy The 7 slot and 8 slot chassis provides three power module slots to implement N 1 redundancy However two power modules are sufficient to power one of these fully loaded Switch 7700 systems The 8 slot chassis offers both AC and DC power modules Table 44 describes the specifications of each type of power module Table 44 Specifications for AC and DC Power Modules Specification AC Power Module DC Power Module Input 100 V to 240 V 47 to 63 Hz 48 V to 60 V Maximum output 460 W 460 W Power Distribution External PoE Power System The Switch 7750 power distribution box is installed on the chassis floor in the back of the chassis It filters connects disconnects and distributes electr
5. reseller Contact Us 3Com offers telephone e mail and internet access to technical support and repair services To access these services for your region use the appropriate telephone number URL or e mail address from the list below You will find a current directory of support telephone numbers posted on the 3Com web site at http csoweb4 3com com contactus Telephone Technical Support and Repair Country To obtain telephone support as part of your warranty and other service benefits you must first register your product at http eSupport 3com com When you contact 3Com for assistance please have the following information ready m Product model name part number and serial number a A list of system hardware and software including revision level a Diagnostic error messages a Details about recent configuration changes if applicable To send a product directly to 3Com for repair you must first obtain a return authorization number RMA Products sent to 3Com without authorization numbers clearly marked on the outside of the package will be returned to the sender unopened at the sender s expense If your product is registered and under warranty you can obtain an RMA number online at http eSupport 3com com First time users will need to apply for a user name and password Telephone numbers are correct at the time of publication Find a current directory of support telephone numbers posted on the 3Com web s
6. 100 Mbps multi mode MMF FE Module Ethernet optical port service channels Figure 16 illustrates the 24 port 100BASE FX MMF FE module 22 CHAPTER 1 SWITCH 7750 COMPONENTS Figure 16 24 Port 1O00BASE FX MMF FE Module Each 100 Mbps optical port has a green LED as shown in Figure 17 Figure 17 Front Panel of the 24 Port 1OOBASE FX MMF FE Module 1 Ethernet port 2 Ethernet port LED Table 27 describes the status of the 24 port 1OO0BASE FX MMF FE module LEDs Table 27 24 Port 100BASE FX MMF FE Module LEDs LED Description LINK ACT Green The port is connected Off The port is not connected Green flashing Data is being transmitted or received The 24 port 100BASE FX MMF FE module requires a 62 5 125 um multi mode optical fiber cable with an MT RJ connector and a central wavelength of 1300 nm Table 28 describes the specifications of the 24 port 100BASE FX MMF FE module Table 28 Specifications for the 24 Port 100BASE FX MMF FE Module Specification Description CPU MPC850 BootROM 512 KB SDRAM 64 MB Dimensions L x W 366 7 x 340 mm 14 5 x 13 4 in Maximum power 55 W consumption Connector type MT RJ Number of ports 24 Port transmission speed 100 Mbps full duplex I O Modules 23 Table 28 Specifications for the 24 Port 100BASE FX MMF FE Module continued Specification Description Cables and maximum transmission distance Compliance 62 5 125 um multi m
7. 1000BASE X GBIC module requires an SC optical fiber connector To attach the SC fiber connector 1 Plug one end of the SC fiber connector into the optical port in the module 2 Connect the other end of the connector to the corresponding device Installing Cabling 47 CAUTION When connecting an SC fiber connector the switch TX must be connected to the RX of the device on the network and the switch RX must be connected to the TX of the device on the network MT RJ fiber connector The 24 port 100BASE FX MMF FE module requires an MT RJ optical fiber connector To attach the MT RJ fiber connector Plug the MT RJ fiber connector in the optical port into the module Connect the other end of the fiber connector to the corresponding device Installing Cabling Bench Mounted Switch Rack Mounted Switch Cable Binding This section describes how to install and bind cables for your Switch 7750 If you have installed your chassis on a bench all interface cables run on the left side of the chassis in the cabling channel and the chassis power cords run by the rear chassis panel If you have installed your switch in a 19 inch standard rack the cables are bound on the cable binding rack at the left side of the chassis and arranged to run on the cable rack or under a raised floor Collect all the transit data signal cable connectors and locate them on the floor of the chassis Power cords run out of the rear left of the chassis and on a
8. 4 Slot Chassis 7 Slot Chassis 8 Slot Chassis Dimensions 436 x 352 8 x 480 mm 436 x 486 2 x 480 mm 436 x 530 6 x 480 mm WxHxD 17x14x19in 17 x 19 x 19 in 17 x21 x 19 in Weight with all 50 Kg 110 Ibs 70 Kg 154 Ibs 80 Kg 177 Ibs components Fabric slots 1 1 2 O module slots 3 6 Fabric submodule 4 port options 1000BASE X GBIC 4 port I O module options PoE Fabric performance Fabric performance Maximum aggregate system performance Packet processing 10 100 1000BASE T 10 100BASE T FE PoE Module 10 100 1000BASE T PoE Module 48 port 10 100BASE TX FE Module 48 port 10 100 1000BASE T Module 48 port 100BASE X SFP Module 20 Port 10 100 1000BASE T Module 20 Port 1000BASE X SFP Module 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP Module 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T Module 8 port 1000BASE X GE Module 8 port 10 100 1000BASE T GE Module 1 port 1OGBASE X XENPAK Module 48 por 48 por 96 Gbps 96 Gbps 96 Gbps 32 Gbps 64 Gbps 64 Gbps 72 Gbps 144 Gbps 54 Mpps 108 Mpps 24 Mpps 48 Mpps 48 Mpps 36 CHAPTER 1 SWITCH 7750 COMPONENTS Table 46 Specifications for the Switch 7750 System continued Item 4 Slot Chassis 7 Slot Chassis 8 Slot Chassis Input voltage AC 100 V to 240 V 50 to 60 Hz AC 100 V to 240 V 50 to 60 Hz DC 48 V to 60 V PoE input voltage 46 V to 55 V 55 0 A Max power 350 W 650 W 800 W consumption all components installed Environment 0 to 40
9. 80 150 mm 3 5 6 in 10 30 mm 5 1 2 in 150 200 mm 6 8 in 30 mm 1 2 in 200 300 mm 8 12 in Post installation Checklist An After you install your switch use the checklist in Table 49 to verify that your switch operates correctly WARNING Confirm that you have turned off the power before checking your installation Improper connections can injure people or damage components of the switch Table 49 Installation Checklist Item Normal Abnormal Remarks Antistatic wrist strap Console cable Ground wire Power cord Fabric VO module Fan frame CONFIGURING THE SWITCH 7750 The following sections of this chapter describe how to configure and boot the Switch 7750 a Configuring the Switch 7750 and a Local Terminal a Setting Terminal Parameters Booting the Switch 7750 Configuring the Switch 7750 and a Local Terminal Configure the local terminal and Switch 7750 using Figure 36 as a reference The terminal a PC in this example is connected to the switch console port using a console cable Figure 36 Connecting the Switch 7750 to a PC Switch Console cable PC Plug the DB 9 or DB 25 female plug of the console cable into the serial port of the PC or the terminal where the switch will be configured Connect the RJ 45 connector of the console cable to the console port of the switch Setting Terminal Parameters To set terminal pa
10. IEEE 802 3ad Table 38 lists the cables for the 1000BASE X SFP ports Table 38 SFP Cables for the 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T Module SFP module Central wavelength Connector Matching cable Maximum transmission distance SFP GE SX MM850 A SFP GE LX SM1310 A SFP GE LH40 SM1310 SFP GE LH40 SM1550 SFP GE LH70 SM1550 SFP GE LH100 SM155 0 SFP GE LH70 SM1470 CW SFP GE LH70 SM1490 CW SFP GE LH70 SM1510 CW SFP GE LH70 SM1530 CW SFP GE LH70 SM1550 CW SFP GE LH70 SM1570 CW 850nm 1310nm 1550nm 1470nm 1490nm 1510nm 1530nm 1550nm 1570nm LC LC LC LC LC LC LC LC LC 50 125 um multimode optical fiber cable 62 5 125 um multimode optical fiber cable 9 125 um single mode optical fiber cable 9 125 um single mode optical fiber cable 9 125 um single mode optical fiber cable 9 125 um single mode optical fiber cable 9 125 um single mode optical fiber cable 9 125 um single mode optical fiber cable 9 125 um single mode optical fiber cable 9 125 um single mode optical fiber cable 550 m 1804 ft 275 m 902 ft 10 km 6 mi 40 km about 25 mi 40 km about 25 mi 70 km 43 mi 100km 62 mi 70km 43 mi 70km 43 mi 70km 43 mi 70km 43 mi 70km 43 mi 70km 43 mi 30 CHAPTER 1 SWITCH 7750 COMPONENTS 8 port 1000BASE X GBIC Module Table 38 SFP Cables for the
11. Table 23 Specifications for the 48 port 10 100 1000BASE T Module Specification Description CPU MPC8241 BootROM 512 KB SDRAM 128 M Dimensions L X W 366 7 x 340 mm 14 4 x 13 4 in Maximum power consumption 70 W Connector RJ 45 Number of ports 48 Port transmission speed 10 100 1000 Mbps half full duplex MDI MDI X auto sensing Cables and maximum Category 5 twisted pair with a maximum transmission transmission distance distance of 100 m 328 ft 20 CHAPTER 1 SWITCH 7750 COMPONENTS 48 port 100BASE X SFP Module Table 23 Specifications for the 48 port 10 100 1000BASE T Module continued Specification Description Compliance 1EEE 802 3ab 1EEE 802 3 1EEE 802 3u 1EEE 802 3x 1EEE 802 1p 1EEE 802 1D 1EEE 802 1Q 1EEE 802 1X 1EEE 802 1s 1EEE 802 1w The 48 port 100BASE X SFP module provides 48 100 Mbps full duplex Ethernet optical ports Figure 14 illustrates the 48 port 1OOBASE X SFP module Figure 14 48 port 48 port 100BASE X SFP Module Figure 15 illustrates the front panel and LEDs of the 48 port 100BASE X SFP module Figure 15 Front Panel of the 48 port 48 port 100BASE X SFP Module 3C16888 ccc mT P ZAV AV AVAY AVAVAVAVAVAVAVAY AV AV AV AWAD v o 12 1 Ethernet port 2 Ethernet port LED Table 24 descri
12. Table 55 RJ 45 MDI Port Pin outs Pinout 10BASE T 100BASE TX 1000BASE T Signal Function Signal Function 1 TX Send data BIDA Send data to direction A 2 Tx Send data BIDA Receive data from direction A Table 55 RJ 45 MDI Port Pin outs continued Optical Fiber Cable Connectors 79 Pinout 10BASE T 100BASE TX 1000BASE T 3 Rx Receive data BIDB Send data to direction B 4 Reserved BIDC Receive data from direction C 5 Reserved BIDC Send data to direction C 6 Rx Receive data BIDB Receive data from direction B 7 Reserved BIDD Send data to direction D 8 Reserved BIDD Receive data from direction D Tx Send data Rx Receive data BI l directional data Table 56 lists RJ 45 MDI X Port Pin outs Table 56 RJ 45 MDI X Port Pinouts Pinout 10BASE T 100 BASE TX 1000BASE T Signal Function Signal Function 1 Rx Receive data BIDB Send data to direction B 2 Rx Receive data BIDB Receive data from direction B 3 TX Send data BIDA Send data to direction A 4 Reserved BIDD Receive data from direction D 5 Reserved BIDD Send data to direction D 6 Tx Send data BIDA Receive data from direction A 7 Reserved BIDC Send data to direction C 8 Reserved BIDC Receive data from direction C Optical Fiber Cable Connectors Figure 47 illustrates the SC optical fiber cable connector Figure 47 SC Optical Fiber Connector 80 APPENDIX A SWITCH 7750 CABLES Figure 48 illustrates the MT RJ fiber op
13. and maximum transmission distance Compliance 10 100 Mbps half full duplex MDI MDIX auto sensing Cables are 2 100 ohm Category 5 twisted pairs up to 100 m 300 ft IEEE802 3 IEEE802 3u IEEE802 3x IEEE802 3ad IEEE802 1 IEEE802 1D IEEE802 1Q IEEE802 1X IEEE802 1s IEEE802 1w See Electrical Port Connector on page 78 for an illustration of the RJ 45 connector and MDI MDI X pinout details 48 port 10 100 1000BASE T Module I O Modules 19 The 48 port 10 100 1000BASE T module provides 48 10 100 1000 Mbps auto sensing Ethernet electrical ports Figure 12 illustrates the 48 port 10 100 1000BASE T module Figure 12 48 port 10 100 1000BASE T Module Figure 13 illustrates the front panel and LEDs of the 48 port 10 100 1000BASE T module Figure 13 Front Panel of the 48 port 10 100 1000BASE T Module D POCOO am P v AVAVAVAYV AVAVAVAVAVAVAVAY AV AV AVY AYADZAT Lr A 12 1 Ethernet port 2 Ethernet port LED Table 22 describes the 48 port 10 100 1000BASE T module LEDs Table 22 48 port 10 100 1000BASE T Module LED LED Description LINK ACT Green The port is connected Off The port is not connected Green flashing Data is being transmitted or received Table 23 describes the specifications of the 48 port 10 100 1000BASE T module
14. boot software and maintain software and hardware This guide also provides troubleshooting and support information for your switch This guide is intended for qualified Service personnel who are responsible for configuring using and managing the switches It assumes a working knowledge of local area network LAN operations and familiarity with communication protocols that are used to interconnect LANs Always download the Release Notes for your product from the 3Com World Wide Web site and check for the latest updates to software and product documentation at http www 3com com Conventions Table 1 lists icon conventions that are used throughout this guide Table 1 Notice Icons Icon Notice Type Description Information note nformation that describes important features or instructions Caution nformation that alerts you to potential loss of data AB or potential damage to an application system or device A Warning nformation that alerts you to potential personal injury Related Documentation The following manuals offer additional information necessary for managing your Switch 7750 a Switch 7750 Command Reference Guide Provides detailed descriptions of command line interface CLI commands that you require to manage your Switch 7750 a Switch 7750 Configuration Guide Describes how to configure your Switch 7750 using the supported protocols and CLI commands a Switch 7750 Release Notes Contains th
15. cable rack or under a raised floor Keep the following precautions in mind as you bind cables a Do not allow cables to twist or bend as you bind them a The cable body cannot be bent at an angle that is more than twice its diameter The cable running out of a connector cannot be bent more than five times its diameter a Different types of cables power cord signal cable and ground wire should not be bound together in a cabinet Although different types of cable may cross over each other they must not be bound together where they cross For parallel cabling the space between a power cord and a signal cable should be no less than 30 mm 1 25 in a The cable binding rack and cable channel inside and outside a cabinet should be smooth a The hole through which a cable runs through should be smooth or have a rubber grommet a Use plastic cabling ties to bind the cables a Bind cables before bending them Ensure that no tie binds the bent part of any cables to prevent the core of the cable from breaking a Do not tie power cables to the guides of any mobile components a For the cable terminals fixed with screws the screws or nuts should be fastened securely a Do not use tapping screws to fasten the cabling terminals 48 CHAPTER 2 INSTALLING THE SWITCH 7750 Follow the parameters defined in Table 48 for binding cables with ties Table 48 Cable Binding Parameters Cable Bundle Diameter Space Between Bundles 10 mm 0 5in
16. module provides 48 10 100 Mbps auto sensing Figure 10 illustrates the 48 port 10 100BASE T FE module Figure 10 48 port 10 100BASE T FE Module 18 CHAPTER 1 SWITCH 7750 COMPONENTS Figure 11 illustrates the front panel and LEDs of the 48 port 10 100BASE TX FE module Figure 11 Front Pane of the 48 Port 10 100BASE TX FE module oe 6 fo oc 4 Some yo O lanonpoo opogngopgo ponpopnogg AV AV AV A AV AV AV AV AV AV AV AV AV AV AV VANN Av 1 _ 12 1 Ethernet por 2 Ethernet port LED Each 100 Mbps Ethe rnet port has a green LED indicating LINK ACTIVE status Table 20 describes the 48 port 10 100BASE TX FE module LED Table 20 48 Port 10 100BASE TX FE module LED LED Description LINK ACT Green The port is connected Off The port is not connected Green flashing Data is being transmitted or received Table 21 describes the specifications of the 48 port 10 100BASE TX FE module Table 21 Specifications for the 48 Port 10 100BASE TX FE Module Specification Description CPU MPC850 BootROM 512 KB SDRAM 64 MB Dimensions L X W 366 7 x 340 mm 14 5 x 13 4 in Maximum power 75 W consumption Connector RJ 45 Number of ports 48 Port transmission speed Cables
17. of the Fabric 32 Figure 3 Fabric 32 1 Submodule slot 2 Console port 3 Ethernet port 4 Ethernet port LEDs 5 Fan LEDs 6 Power LEDs 7 O module LEDs 8 Reset button Table 3 lists Fabric specifications Table 3 Fabric Specifications PoE Fabric 96 Fabric 64 3C16857 Item 3C16886 or 3C16857R Fabric 32 3C16872 Bandwidth 96 Gbps 64 Gbps 32 Gbps CPU MPC8245 MPC8260 200 Mhz BootROM 512 KB 1 MB SDRAM 256 M 256 MB Flash 32 MB 16 MB Submodule slot Dimensions L x W External ports Maximum power consumption 366 7 mm x 340 mm 14 5 x 13 5 in One console port that supports local and remote dial up configuration management of the switch One 10BASE T 100BASE TX port for upgrade and network management One Compact Flash port for storing log and host version and for online software upgrades Four 1000BASE X SFP ports 80 W 80 W 70 W with submodule The submodule slot in the Fabric 32 offers extended Ethernet capacity using the following submodules 10 CHAPTER 1 SWITCH 7750 COMPONENTS Fixed Ports m 4 port 1000BASE X GBIC submodule m 4 port 10 100 1000BASE T submodule For more information on these submodules see Fabric 32 Submodules on page 12 The Switch 7750 Fabric modules provide the following fixed ports a Compact Flash CF Port m 1000BASE X SFP PoE Fabric 96 only Console Port m Ethernet Port Com
18. power is working normally or has not been installed Troubleshooting the Fan If the fan OK LED is off check that The fan has been installed in the correct position for normal communication with the backplane Every heat dissipation fan is working normally There is nothing blocking the vent of the chassis The blanking plates are installed on the chassis where no module is inserted Table 51 describes fan LEDs on the Fabric Table 51 Fan LEDs on the Fabric LED Status Description OK On The fan is working normally Off The fan has failed or has not been installed FAIL On The fan has failed Off The fan is working or has not been installed Troubleshooting the Modules The Fabric and I O module LEDs show the status of the FABRIC and the I O modules as described in Table 52 If the ALM LED of the module remains green or green flashing it indicates there is something wrong with the module During the process of resetting the module the ALM LED remains on After normal booting it is off When resetting the module if the ALM LED remains off the module may not be connected to the power source Verify that the module has been properly installed in the correct position Table 52 Module LEDs on the Fabric LED Status Description RUN Green Off The module has failed or has not been inserted Green flashing The module is working normally ALM Off The module is working
19. straight through cable into the Ethernet RJ 45 port of the switch 2 Plug the other end of the straight through cable into the RJ 45 port of the hub or LAN Switch Ports on 48 port 10 100BASE T and 8 port 10 100 1000BASE T modules support MDI MDI X auto sensing Connecting Optical Fiber Cables The following modules require fiber optic cables m 24 port 100BASE FX MMF FE module m 20 port 1000BASE X SFP module m 1000BASE SX MM 1000BASE LX SM IR and 1000BASE LX SM optional GBIC modules for the 4 port 1000BASE X GBIC submodule When connecting optical fiber cables use the fiber connectors that are appropriate for the optical port type of the peer equipment that is connected to the local network port module See Optical Fiber Cable Connectors on page 79 for illustrations of the fiber optic cable connectors Single mode optical fiber cable is used for external connections of the single mode optical port Multi mode optical fiber cable is used for external connections of the multi mode optical port Before connecting the optical fiber cable make sure the type of the connector and the optical fiber cable are consistent with the optical port type WARNING When a connector is not inserted in the optical port or when its dustoroof cover is open invisible radiation can escape from the optical port Do not stare into the optical port directly Cover the optical port if there is no connector plugged in SC fiber connector The 8 port
20. the ISDN lines to the console or AUX port 38 CHAPTER 2 INSTALLING THE SWITCH 7750 Electrical Safety Moving the Switch Laser Safety A A a During the installation wear an antistatic wrist strap and antistatic gloves See Static Electricity on page 39 for additional information on preventing static WARNING Follow local safety regulations when performing any operation with the Switch 7750 Follow the related safety information and special safety instructions provided by 3Com 3Com bears no responsibility for accidents that occur due to violations of safe operation requirements To maintain electrical safety note the following recommendations m Look carefully for possible hazards in your work area such as ungrounded power extension cables missing safety grounds and moist floors a Locate the emergency power off switch in the room where you are working Shut the power off at once in the event of an accident a Unplug all the power cords and external cables before moving the chassis a Never assume that power is disconnected from a circuit Always check Use caution when moving the Switch 7750 Note the following recommendations when moving the switch m Do not move the switch alone Work with another person a Move the switch slowly Never move suddenly or twist your body a Always disconnect all external cables including power cord before lifting or moving the chassis m Do not hold the power handles whe
21. with the switch To install the switch on a workbench take the following precautions a Ensure that the workbench is smooth and stable a Leave a heat dissipation clearance in the front and back of the switch of more than 1 m 3 ft and at least 0 8 meters 2 5 ft away from the walls on the sides m Do not put heavy objects on the switch Installing the Cabling Rack To install the cabling rack Attach the rack brace to the left side of the chassis opposite the fan frame Insert the wiring channel into the brace and fasten the screws Installing a Module 41 Installing a Module U A W N To install a module Wear an antistatic wrist strap Remove the blanking plate from the chassis slot and save it for future use Hold the ejector levers of the module with both hands and push them outward Align the module with the guides in the chassis and slide it gently into the slot Push the module until the captive thumb screw on its handle bar touches the hole in the chassis Push the ejector levers inward and push the handle bar pin into the positioning hole in the chassis Fasten the module s captive mounting screws into the holes in the chassis with a screwdriver Installing a Submodule To install a submodule in the Fabric 32 you need the following tools a Phillips head screwdriver 2 a Small pliers Do the following Wear an antistatic wrist strap Unfasten the screws on the Fabric 32 printed c
22. 0 100 1000BASE T Module 3C 16888 48 port 100BASE X SFP Module 20 Port 10 100 1000BASE T Module 3C 16863A 20 Port 1000BASE X SFP Module 3C16862A 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP Module 3C 168916 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T Module 3C 186917 8 port 1000BASE X GBIC Module 3C 16858 8 port 10 100 1000BASE T GE Module 3C 16859 100Base FX SFP mode 3C 16865915 Consider the following when selecting I O modules You can configure several I O modules of the same type Any combination of I O modules can be inserted but only PoE I O modules provide the features of power over Ethernet 48 port 10 100BASE T FE PoE Module I O Modules 15 a You must select I O module port cables that are compatible with each installed O module The 48 port 10 100BASE T FE PoE module provides 48 10 100 Mbps auto sensing Ethernet ports that provide a remote power supply to powered devices Figure 12illustrates the 48 port 10 100BASE T FE PoE module Figure 6 48 port 10 100BASE T FE PoE Module Se Figure 13 illustrates the front panel and LEDs of the 48 port 10 100BASE T FE PoE module Figure 7 Front Panel of the 48 port 10 100BASE T FE PoE Module steer p B2SSSSS5 SSR66555 S5500854F a pe PTT PRA AA I RA AZAV AV AVAY AVAVAVAVAVAVAVAY AV AV AY AY OEE oT 1 2 1 Ethernet port 2 Ethernet port LED
23. 0 flash 77h03 01 51s56c10 app slotl flash Set the boot loader to boot off from the new application image after the next reboot lt SW 7700 8 slot gt boot boot loader primary slotl flash 77h03_01 51s56cl0 app slotl flash Lost Passwords If the BootROM password of the switch is lost contact your local support center listed in Appendix B Using the BOOT Menu After you power on the Switch 7750 the BootROM program runs automatically The terminal displays the following information 64 CHAPTER 4 MAINTAINING SOFTWARE kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Switch 7750 BOOTROM Version 516 7 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Copyright c 2003 2005 3Com Corporation Creation date Jan 20 2005 09 37 12 CPU type MPC8245 CPU Clock Speed 400Mhz BUS Clock Speed 66Mhz BOOT_FLASH type M29W040B Flash Size 32MB Memory Size 256MB FAB96 gt self testing ose si ie a Sa Ae Pa a E SRG eh E E SDRAM Data Fines Selfteste soera e aa a ee in asses Bead OK SDRAM Address lines S lftest orea eaoaai a e eee OK SDRAM f st s lf TEST ete Ab 2 ede tren dhe pal E E ED BS Os OK Please check LEDS 2 2 sc ces Vaio eel nbn Hae LEDs selftest finished CPLD S LECSS EE see Fie tan ee VR e ds ean edie entice gre stacey On oe ga eee ae OK FPGA SelftesEiarm eea e ase a VAN Ns va S A E See erie Bb he So gw eee es OK The switch Mac address is 00 eee eee 0020 4C6A CF04 Press Ctrl B to e
24. 0BASE T PoE module Figure 9 Front Panel of the 48 port 10 100 1000BASE T PoE Module 3C16890 OOOO OOo OO OOOO p COReneco K a 2 VAVAVAY AV AVAVAVAVAVAVAY AV AV AV AY 2 1 Ethernet port 2 Ethernet port LED 48 port 10 100BASE TX FE Module I O Modules 17 Table 22 describes the 48 port 10 100 1000BASE T PoE module LEDs Table 18 48 port 10 100 1000BASE T PoE Module LED LED LINK ACT Description Green The port is connected Off The port is not connected Green flashing Data is being transmitted or received Table 23 describes the specifications of the 48 port 10 100 1000BASE T PoE module Table 19 Specifications for the 48 port 10 100 1000BASE T PoE Module Specification Description CPU MPC8241 BootROM 512 KB SDRAM 128M Dimensions L X W 366 7 x 340 mm 14 4 x 13 4 in Maximum power consumption 70 W Connector RJ 45 Number of ports 48 Port transmission speed Cables and maximum transmission distance Compliance Ethernet electrical ports 10 100 1000 Mbps half full duplex MDI MDIX auto sensing Category 5 twisted pair with a maximum distance of 100 m 328 ft IEEE802 3ab IEEE802 3 IEEE802 3i IEEE802 3x IEEE802 1p IEEE802 1D IEEE802 1Q IEEE802 1X IEEE802 1s IEEE802 1w The 48 port 10 100BASE TX FE
25. 0nm 1570nm 1590nm 1610nm LC LC LC LC LC LC LC LC LC LC LC RJ45 50 125 um multimode optical fiber cable 62 5 125 um multimode optical fiber cable 9 125 um single mode optical fiber cable 9 125 um single mode optical fiber cable 9 125 um single mode optical fiber cable 9 125 um optical fib 9 125 um optical fib 9 125 um optical fib 9 125 um optical fib 9 125 um single mode optical fiber cable ingle mode r cable Dun ingle mode r cable Dun ingle mode r cable Dun ingle mode r cable Dun 9 125 um single mode optical fiber cable 9 125 um single mode optical fiber cable 550 m 1804 ft 275 m 902 ft 10 km 6 mi 40 km about 25 mi 40 km about 25 mi 70 km 43 mi 100km 62 mi 70km 43 mi 70km 43 mi 70km 43 mi 70km 43 mi 70km 43 mi 70km 43 mi 70km 43 mi 70km 43 mi 100m 328 ft The 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T module provides 12 1000BASE X SFP ports and 4 10 100 1000BASE X SFP ports Figure 24 illustrates the 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T module 28 CHAPTER 1 SWITCH 7750 COMPONENTS Figure 24 12 port 1OOOBASE X SFP and 4 port 10 100 1000BASE T Module Figure 25 illustrates the front panel of the 12 port 1000BASE X SFP module Figure 25 Front Panel of the 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T Module Z
26. 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T Module Maximum Central transmission SFP module wavelength Connector Matching cable distance SFP GE LH70 SM1590 1590nm LC 9 125 um single mode 70km 43 mi CW optical fiber cable SFP GE LH70 SM1610 1610nm LE 9 125 um single mode 70km 43 mi optical fiber cable SFP GE T RJ45 100m 328 ft The 8 port 1000BASE X GBIC module provides 8 external GBIC module ports A GBIC module is used for each data receiving transmitting channel The following modules are available m 3CGBIC91 m 3CGBIC92 a 3CGBIC97 Figure 26 illustrates the 8 port 1000BASE X GBIC module Figure 26 8 Port 1000BASE X GBIC Module Every GBIC port has a LED as shown in Figure 27 Figure 27 Front Panel of the 8 Port 1000BASE X GBIC Module 1 GBIC port 2 GBIC port LED I O Modules 31 Table 39 describes the 8 Port 1000BASE X GBIC module LEDs Table 39 8 Port 1000BASE X GBIC Module LEDs LED Description LINK Off The link is not connected Green The link is connected ACT Off No data is being transmitted or received Green flashing Data is being transmitted or received The cables for each of the supported 8GBIC modules are described inTable 40 Table 40 GBIC Module Port Cables GBIC Module Type Central Wave Length 3CGBIC91 850 nm 3CGBIC92 1550 nm 3CGBIC97 1550 nm Table 41 describes the specifications of the 8 port 1OOOBASE X GBIC module Tabl
27. 5 twisted pair 100 m 300 ft IEEE 802 3ab IEEE 802 3 IEEE 802 3u IEEE 802 3x IEEE 802 1D IEEE 802 1Q 20 Port 1000BASE X SFP The 20 port 1000BASE X SFP module provides 20 1000 BASE X full duplex ports Module and uses an SFP cable Figure 20 illustrates the 20 port 1OO0OBASE X SFP module Figure 20 20 Port 1000BASE X SFP Module Figure 21 illustrates the front panel of the 20 port 1000BASE X SFP module Figure 21 Front Panel of the 20 Port 1O00BASE X SFP Module 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP Module I O Modules 25 1 Ethernet port 2 Ethernet port LED Table 31 describes the 20 port 1000BASE X SFP module LEDs Table 31 20 Port 1000BASE X SFP Module LEDs LED Description LINK ACT Off The port is not operating On The port is operating Green flashing The port is transmitting or received data Table 32 lists specifications of the 20 port 1000BASE X SFP module Table 32 Specifications for the 20 Port 1000BASE X SFP Module Specification Description CPU MPC8241LZU200 BootROM 512 KB SDRAM 64 MB Dimensions L x W 366 7 x 340 mm 14 5 x 13 4 in Power consumption 35 W Connector SFP socket Number of ports 20 Transmission rate Cable and maximum transmission distance Compliance 1000 Mbps full duplex 1000BASE SX SFP multi mode optical fiber short haul 1000BASE LX SFP single mode optical fiber 1310 nm 1000BASE LH SFP single mode optical f
28. 9 161346 U K 0870 241 3901 You can also obtain support in this region using the following URL http emea 3com com support email html Latin America Telephone Technical Support and Repair Antigua 1 800 988 2112 Guatemala AT amp T 800 998 2112 Argentina 0 810 444 3COM Haiti 57 1 657 0888 Aruba 1 800 998 2112 Honduras AT amp T 800 998 2112 Bahamas 1 800 998 2112 Jamaica 1 800 998 2112 Barbados 1 800 998 2112 Martinique 571 657 0888 Belize 52 5 201 0010 Mexico 01 800 849CARE Bermuda 1 800 998 2112 Nicaragua AT amp T 800 998 2112 Bonaire 1 800 998 2112 Panama AT amp T 800 998 2112 Brazil 0800 13 3COM Paraguay 54 11 4894 1888 Cayman 1 800 998 2112 Peru AT amp T 800 998 2112 Chile AT amp T 800 998 2112 Puerto Rico 1 800 998 2112 Colombia AT amp T 800 998 2112 Salvador AT amp T 800 998 2112 Costa Rica AT amp T 800 998 2112 Trinidad and Tobago 1 800 998 2112 Curacao 1 800 998 2112 Uruguay AT amp T 800 998 2112 Ecuador AT amp T 800 998 2112 Venezuela AT amp T 800 998 2112 Dominican Republic AT amp T 800 998 2112 Virgin Islands 57 1 657 0888 You can also obtain support in this region using the following Spanish speakers enter the URL http lat 3com com lat support form html Portuguese speakers enter the URL http lat 3com com br support form html English speakers in Latin America should send e mail to lat support _anc 3com com US and Canada Telephone Technical Support and Repair 1 800 876 3266 76 C
29. C 32 to 104 F and 10 to 90 temperature and humidity A INSTALLING THE SWITCH 7750 The following sections describe how to prepare and install the components of the Switch 7750 Preparing to Install General Site Requirements Installation Checklist Installing the Chassis Installing the Cabling Rack Installing a Module Installing a Submodule Connecting the Ground Wire Connecting and Configuring Power Installing the Fan Assembly Installing Cables Connecting Module Cables Post installation Checklist WARNING Only trained and qualified personnel should install and maintain 3Com products Preparing to Install General Safety Recommendations This section provides guidelines for preparing your site and switch for installation Before installing your switch note the following safety recommendations Switch off the power supply before connecting the cables Keep the switch away from heat sources To ensure normal heat dissipation do not stack switches Do not keep the switch in a damp place and prevent liquid from getting into the switch Ensure that the neutral point of the power is grounded properly to avoid personal injury Ensure that the power is off before plugging or unplugging the modules and cables of the switch Before moving the chassis disconnect all the power cords and external cables To avoid damage to the switch connect all the cables correctly Never connect telephone cables including
30. C or DC power source and Configuring Power Connecting AC Power Cords from the PoE power rack To connect AC power cords Power off all the related parts of the switch before connecting the AC power cord Plug the power cords into the sockets in the switch and attach the retention clips to the power cord plugs Plug the other end of the cords into a socket strip with surge protector Connect the strip to the power source in the room Figure 32 illustrates the AC power cord connection Figure 32 AC Power Cord Connection 1 OROR0K a O amp O 680808 a R FB 5252525252929 2525252525909 NG ka 080808 80809090909080 808080209090 8 02090 ROR ORO ROBO POR G ROG BP aRoto 020920 O20920 9 se O aZ00 898080 DIEG o ogo0209 ETO 809020902090 20809000902090 SO ogo 020809 8020909090202020 8020209090 ER a a PNE 08080 PoP a8o8o8o8o8o8o8a808o8o O8o808 _ KO DBOLOSoPo8a8oPo8ofoPo8oSakoGoSoPaFakoka8a8okoFoRo8o8okp8oSoko8o8o868a8o8 e 000000000000000001000000000000000000000000000000000000 0000000000000000 2 1 AC power sockets 2 Retention clips 3 Grounding screw WARNING For surge protection the power should be channelled through an external protection device into the Switch 7750 Connecting DC Power Cords Configuring AC Power Sources 1 2 Conn
31. CAN 38COM http www 3com com Part No 10016428 AB Published December 2007 3Com Family Switch 7750 Installation Guide 3C16896 8 slot AC Chassis 3C16897 8 slot DC Chassis 3C16895 7 slot Chassis 3C16894 4 slot Chassis and associated modules 3Com Corporation 350 Campus Drive Marlborough MA 01752 3064 Copyright 2005 2007 3Com Corporation All rights reserved No part of this documentation may be reproduced in any form or by any means or used to make any derivative work such as translation transformation or adaptation without written permission from 3Com Corporation 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change 3Com Corporation provides this documentation without warranty term or condition of any kind either implied or expressed including but not limited to the implied warranties terms or conditions of merchantability satisfactory quality and fitness for a particular purpose 3Com may make improvements or changes in the product s and or the program s described in this documentation at any time If there is any software on removable media described in this documentation it is furnished under a license agreement included with the product as a separate document in the hard copy documentation or on the removable media in a directory file named LICE
32. DC power cord to the grounding screw of the switch and fasten the mounting screw insert the other end to the grounding bar for the switch For detailed instructions on how to install the PoE rack see the Switch 7750 PoE Rack Installation Guide Installing the Fan Assembly 45 Installing the Fan Assembly A N OAU A U Na To install the fan Wear an antistatic wrist strap Remove the fan frame from the pack Hold the ejector levers on the fan frame with both hands and push them outward Align the fan with the guides in the chassis and slide it gently into the slot Push the fan until its positioning pin touches the hole in the chassis Push the ejector levers inward Push the handle bar pin into the hole in the chassis WARNING To avoid injury do not touch any naked wire terminal or any other part of the product labelled Dangerous Voltage Always wear the antistatic wrist strap when installing the fan Installing Cables Connecting the Console Cable Connecting the AUX Cable This section describes how to connect console and AUX cables to the Switch 7750 The console cable is an 8 core shielded cable One end of the cable has a crimped RJ 45 connector which is plugged into the console port of the switch The other end has both a DB 9 hole connector and a DB 25 hole connector for connection to a 9 hole or 25 hole serial port at the configuration terminal See Console Cable on page 77 for cable illustr
33. HAPTER B OBTAINING SUPPORT FOR YOUR SWITCH SWITCH 7750 CABLES This appendix covers the following types of cables and connectors Console Cable AUX Cable Electrical Port Connector Optical Fiber Cable Connectors Console Cable Figure 44 illustrates the console cable and connectors Figure 44 The Console cable Enlarged A side DB25 Female Pos 2 Table 53 lists console cable pin outs Table 53 Console Cable Pin outs RJ 45 Signal Direction DB 25 1 RTS lt 4 2 DTR lt 20 3 TXD lt 2 4 CD gt 8 5 GND 7 6 RXD gt 3 7 DSR gt 6 8 CTS gt 5 DB 9 o N aUa W A N AUX Cable Figure 45 illustrates the AUX cable 78 APPENDIX A SWITCH 7750 CABLES Figure 45 The AUX Cable Enlarged A side DB25 Male 8P8C Plug Pos 1 S ait B side D i Di a DB9Male POS 1 P0S 8 Enlarged C side Pos 9 B UUUUUUUU Pos 25 Table 54 lists the AUX cable pin outs Table 54 AUX Cable Pin outs RJ 45 Signal Direction DB 25 DB 9 1 RTS gt 4 7 2 DTR gt 20 4 3 TXD gt 2 3 4 CD lt 8 1 5 GND 7 5 6 RXD lt 3 2 7 DSR lt 6 6 8 CTS lt 5 8 Electrical Port Figure 46 illustrates the RJ 45 connector Connector Figure 46 The RJ 45 Connector PIN 8 PIN 1 Table 55 lists RJ 45 MDI port pin outs
34. NSE TXT or LICENSE TXT If you are unable to locate a copy please contact 3Com and a copy will be provided to you UNITED STATES GOVERNMENT LEGEND If you are a United States government agency then this documentation and the software described herein are provided to you subject to the following All technical data and computer software are commercial in nature and developed solely at private expense Software is delivered as Commercial Computer Software as defined in DFARS 252 227 7014 June 1995 or as a commercial item as defined in FAR 2 101 a and as such is provided with only such rights as are provided in 3Com s standard commercial license for the Software Technical data is provided with limited rights only as provided in DFAR 252 227 7015 Nov 1995 or FAR 52 227 14 June 1987 whichever is applicable You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in or delivered to you in conjunction with this User Guide Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com and the 3Com logo are registered trademarks of 3Com Corporation Intel and Pentium are registered trademarks of Intel Corporation Microsoft MS DOS Windows and Windows NT are registered trademarks of Microsoft Corporation UNIX is a registered trademark in the United States and other countries li
35. Selecting the Application File for the Boot If the Switch 7750 primary image fails because of a CRC error or a file format error you can configure the system to find the backup image you select to boot from To select the image file that you want the system to boot from Select o to return to the Boot Menu Select option 2 from the Boot Menu The following text displays File Number File Size bytes File Name T 4 snmpboots 2 6256229 SW7750 V300RE 8016 app 3 1012 taskswitch log 4 151 private data txt Bes 228308 SLE 6 1975 sw7750 cfg ding 631736 Btm400 btm 8 462848 SW7750 V300R app Ol 228376 S3com400 app 10 199696 8241btm app VA 2427 vrpcefg txt 12 203460 lpcom400 app 13 228308 snec400 app The current application file is SW7750 V300R app The backup application file is SW7750 V300RE 8016 app Free Space 7536640 bytes Enter the file number of the primary image Please input the primary image file number 13 To confirm this choice type Y at the prompt The primary file you selected is snec400 app are you sure Yes or No Y N Y On reboot snec400 app will become the default application file to boot Enter the file number of the backup image Please input the backup image file number 8 To confirm this choice type Y at the prompt Upgrading Software 59 The file you selected is SW7750 V300R app are you sure Yes or No Y N y On reboot SW7750 V300R app will become the default app
36. along the guides and out of the slot Put the removed module into the package that contained the replacement module Replace the blanking plate on the chassis if you do not install a new module in the place where the old one was removed To install a replacement module With both hands hold the ejector levers on the module that will be installed Align the module with the guides in the chassis and slide it into the slot gently until you feel the positioning pin on the handle bar touch the hole in the chassis Press the ejector levers inward and seat the pin on the handle bar into the positioning hole in the chassis Fasten the captive screws to fix the module Replacing the Fan Assembly AN You can hot swap fan assemblies in the Switch 7750 To replace a fan assembly you need a An antistatic wrist strap a A Screwdriver WARNING To avoid injury do not touch any naked wire terminal or any part of the product labeled Dangerous Voltage Always wear the antistatic wrist strap when replacing the fan module To replace a fan assembly Put on the antistatic wrist strap With both hands pull out the ejector levers on the fan assembly to separate the fan assembly connector from the backplane Pull the fan gently along the guides of the slot to remove it 4 With both hands pull out the ejector levers of the fan that will be installed Align it with the guides in the chassis and slide it gently into the slot until y
37. ation and pinout details To connect a terminal or PC to the Switch 7750 using the console cable Plug the DB 9 or DB 25 female plug of the console cable to the serial port of the PC or the terminal where the switch is to be configured Connect the RJ 45 connector of the console cable to the console port of the switch An AUX cable is used to connect the Switch 7750 to a modem in a remote dial up configuration The AUX cable is an 8 core shielded cable One end of the cable is an RS 232 RJ 45 connector which is used to plug into the switch at the console port The other end has both a DB 9 pin connector and a DB 25 pin for connection to a 9 hole or 25 hole serial port on the virtual modem See AUX Cable on page 77 for cable illustration and pinout details To connect the AUX cable Plug the RJ 45 end of the AUX cable into the switch console port Connect the DB 25 or DB 9 end of the AUX cable to the serial port of the virtual modem 46 CHAPTER 2 INSTALLING THE SWITCH 7750 Connecting Module Cables Ve This section describes how to connect electrical and optical cables Connecting Electrical Port Cables The 48 port 10 100BASE T module and 8 port 10 100 1000BASE T module require a RJ 45 connector and category 5 twisted pair cable See Electrical Port Connector on page 78 for an illustration of the RJ 45 connector and MDI MDI x pinout details Use the following steps to connect the port Plug one end of the
38. bes the 48 port 100BASE X SFP module LEDs Table 24 48 port 100BASE X SFP Module LED LED Description LINK ACT Green The port is connected Off The port is not connected Green flashing Data is being transmitted or received Table 25 describes the specifications of the 48 port 100BASE X SFP module Table 25 Specifications for the 48 port 100BASE X SFP Module Specification Description CPU MPC8241 BootROM 512 KB SDRAM 128M I O Modules 21 Table 25 Specifications for the 48 port 100BASE X SFP Module continued Specification Description Dimensions L X W 366 7 x 340 mm 14 4 x 13 4 in Maximum power consumption 36 5 W Connector LC Number of ports 48 SFP module OOBASE FX MM SFP OOBASE FX SM SFP OOBASE FX SM LR SFP OOBASE FX SM VR SFP Port transmission speed 00 Mbps full duplex Compliance EEE 802 3 EEE 802 3u EEE 802 3x EEE 802 3ad EEE 802 1p EEE 802 1D EEE 802 1Q EEE 802 1X EEE 802 15 EEE 802 1w Table 26 lists the cables for the 48 port 100BASE X SFP ports Table 26 Cables for the 48 port 100BASE X SFP Module Central Maximum wave transmission SFP module length Connector Matching cable distance 1O00BASE FX MM SFP 1310nm LC multimode optical fiber 2 km 1 2 mi 10OBASE FX SM SFP 1310nm ple 15 km 9 3 mi 100BASE FX SM LR S 1310nm 9 125 um single mode 40 km 24 9 mi FP optical fiber cable 100BASE FX SM VR S_ 1550nm 70km 43 mi FP 24 port 100BASE FX The 24 port 1OOBASE FX MMF FE module provides 24
39. box Folder C Documents and Settings Administrator B20 7 000 Filename C SW7750 apr Browse Protocol xmodem T Close Cancel Change the protocol name for the download to Xmodem Click Send The dialog box shown in Figure 43 displays Figure 43 Xmodem File Send Dialog Box Xmodem file send for comm1 gq Sending C SW7750 app Packet Error checking ERC Retries jo Total retries jo Last error File ok of 261K Elapsed Remaining Throughput cps bps After the download is complete the system interface is shown as follows Loading Ceececeecceceeceeceeceeceeceeceececceeceececceccee done Select o to return to the Boot Menu From the boot menu select option 2 then select the newly downloaded file TFTP Trivial File Transfer Protocol is a simple file transfer protocol that is used without complex interaction between clients and servers The client initiates a TFTP transmission To download files the client sends a read request packet to the TFTP server receives the packet from the server and sends the acknowledgement to the server To upload files the client sends a write request packet to the TFTP server sends the data packet to the server and receives the acknowledgement from the server The Switch 7750 provides the functions of the TFTP client Upgrading Software in the Secondary Fabric of the 8 slot Chassis 1 Lost Passwords 63 A TFTP Server p
40. bution 33 External PoE Power System 33 Fan Assembly 34 Switch 7750 Specifications 35 INSTALLING THE SWITCH 7750 Preparing to Install 37 General Site Requirements 38 Installation Checklist 39 Installing the Chassis 40 Installing the Cabling Rack 40 Installing a Module 41 Installing a Submodule 41 Connecting the Ground Wire 42 Connecting and Configuring Power 42 Installing the Fan Assembly 45 Installing Cables 45 Installing Cabling 47 Post installation Checklist 48 CONFIGURING THE SWITCH 7750 Configuring the Switch 7750 and a Local Terminal 49 Setting Terminal Parameters 49 Booting the Switch 7750 52 4 CONTENTS MAINTAINING SOFTWARE Upgrading Software 55 Lost Passwords 63 Using the BOOT Menu 63 TROUBLESHOOTING Troubleshooting the Configuration 67 Troubleshooting Power 67 Troubleshooting the Fan 68 Troubleshooting the Modules 68 MAINTAINING HARDWARE Replacing a Power Module 69 Replacing a Power Supply 70 Replacing I O Modules 71 Replacing the Fan Assembly 71 OBTAINING SUPPORT FOR YOUR SWITCH Register Your Product to Gain Service Benefits 73 Purchase Value Added Services 73 Troubleshoot Online 73 Access Software Downloads 73 Contact Us 74 Telephone Technical Support and Repair 74 SWITCH 7750 CABLES Console Cable 77 AUX Cable 77 Electrical Port Connector 78 Optical Fiber Cable Connectors 79 ABOUT THIS GUIDE This guide describes the 3Com Switch 7750 and how to install hardware configure and
41. censed exclusively through X Open Company Ltd IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers Inc All other company and product names may be trademarks of the respective companies with which they are associated ENVIRONMENTAL STATEMENT It is the policy of 3Com Corporation to be environmentally friendly in all operations To uphold our policy we are committed to Establishing environmental performance standards that comply with national legislation and regulations Conserving energy materials and natural resources in all operations Reducing the waste generated by all operations Ensuring that all waste conforms to recognized environmental standards Maximizing the recyclable and reusable content of all products Ensuring that all products can be recycled reused and disposed of safely Ensuring that all products are labelled according to recognized environmental standards Improving our environmental record on a continual basis End of Life Statement 3Com processes allow for the recovery reclamation and safe disposal of all end of life electronic components Regulated Materials Statement 3Com products do not contain any hazardous or ozone depleting material CONTENTS ABOUT THIS GUIDE Conventions 5 Related Documentation 5 SWITCH 7750 COMPONENTS Switch Chassis 7 Switch Backplane 7 Fabric Module 8 Fabric 32 Submodules 12 VO Modules 14 Power Module 33 Power Distri
42. ch Continue Y N y For more detailed descriptions of the setup and procedures for upgrading software see the remaining sections in this chapter To perform this procedure you must have a network connection to the management port on the Switch 7750 Fabric module After powering on the Switch 7750 the BootROM program runs automatically The terminal displays the following information kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Switch 7750 BOOTROM Version 516 x kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk kkkkkkkkkkk Copyright c 2003 2005 3Com Corporation Creation date Jan 20 2005 09 37 12 CPU type MPC8245 CPU Clock Speed 400Mhz BUS Clock Speed 66Mhz BOOT_FLASH type M29W040B Flash Size 32MB Memory Size 256MB Upgrading Software 57 PAB96 Self testing eed s seo May OS Pie eee Was Se ee Awe eee ee SDRAM Data ines Sel PTrest ose wcderete bv eee wed heen e A eee A Se SSE OK SDRAM Address lines Selftest cee eee E nes OK SDRAM fasts Sel Tees ties shes eM een SES See A ee Saeed OK Please check LEDS LEDs selftest finished CPLD SETTES riai see eet oka te eM eee ie eee aa eas ee EE a OK FPGA SeLECCSE oe cect a ar apa wate yee Rr kL SSS ae eG OK The switch Mac address is 0 24 0020 4C6A CF04 Press Ctrl B to enter Boot Menu Press Ctrl B The system displays the prompt for the BootROM password Password To access the BOOT Menu press Ct
43. cond AC source or backup system If the primary AC source fails the switch automatically fails over to the secondary AC source There is no disruption to system operation during the power fail over 44 CHAPTER 2 INSTALLING THE SWITCH 7750 Connecting the PoE Power Cord 1 Follow these steps to connect the power cord from the PoE rack Loosen the mounting screw of the PoE terminal block on the rear panel of the switch Insert the 48V OT terminal of the DC power cord to the NEG terminal of the switch and fasten the mounting screw insert the other end to the NEG terminal of the external PoE power supply See Figure 34 for a detailed view Figure 34 Back of the PoE Rack Iz 46 55V 55 0A NEG RING T T t 1 PoE external power input NEG 2 PoE external power input NEG 3 COM port external power monitor Insert the GND OT terminal of the DC power cord to the RTN terminal of the switch and fasten the mounting screw insert the other end to the NEG terminal of the site power Figure 35 Front Panel of the PoE Rack SESS 0 Oye 1 AC input socket 2 DC output terminal NEG 3 DC output terminal RTN 4 RS232 serial port Os EE oo o o Insert the PGND OT terminal of the
44. cted The voltage of power supply can meet the requirements on the switch The console cable has been connected properly The PC or terminal for configuration has been started The terminal parameters have been set Booting the Switch 7750 53 Powering up and Turn on the power for the Switch 7750 and run the BootROM program The Booting terminal displays the following information Starting RAM Line OK System is booting kkkkxkxkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk kkkkkxk Switch 7750 BOOTROM Version 300 bd kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk kkkkkxk Copyright C 2001 2005 by 3Com Corporation Inc Creation date Mar 25 2003 09 33 05 CPU type MPC8260 CPU Clock Speed 200Mhz BUS Clock Speed 66Mhz Memory Size 256MB FAB64 self testing cc daran Lhe eee eee eas Eee ee 60X SDRAM Data lines Selfitest ss aeua ce ee ees be OK 60X SDRAM Address lines Selftest 0 4 OK 60X SDRAM fast SELECSS tices ci sii oe re dan a eat seh as Bf Sere OK Please check LEDS LEDs selftest finished Switch chip selPeest o c acne 4 staan ge e ouete docs a h o ea Soh eae OK CRED SGVPECS Gilat eia ears SAS a eS eles e a a OI nate ce igual Sane OK The switch Mac address iS cc kia seek ered pinia 00E0 FC00 7505 Press Ctrl B to enter Boot Menu 5 D gt To enter Boot Mode see Chapter 6 press Ctrl B during the 5 seconds that Press Ctrl B t
45. e 41 Specifications for the 8 Port 1000BASE X GBIC Module Specification Description CPU MPC850 BootROM 512 KB SDRAM 64 MB Dimensions L x W 366 7 x 340 mm 14 5 x 13 4 in Maximum power 50 W consumption Number of ports 8 Optional GBIC module 3CGBIC 91 types 3CGBIC 92 3CGBIC 97 Port transmission speed 1000 Mbps full duplex Compliance IEEE 802 3z IEEE 802 3x 8 port The 8 port 10 100 1000BASE T GE module provides 8 external 10 100 1000 10 100 1000BASE T GE Mbps auto sensing Ethernet electrical ports Module Figure 28 illustrates the 8 port 10 100 1000BASE T GE module 32 CHAPTER 1 SWITCH 7750 COMPONENTS Figure 28 8 Port 10 100 1000BASE T GE Module Each port on the 8 port 10 100 1000BASE T GE module has 2 LEDs as shown in Figure 29 Figure 29 Front Panel of the 8 Port 10 100 1000BASE T GE Module 2g 9 ff df fg te 7 fe Oe Ede EAs Ede EA EAs EAS Bas Gas 1 2 1 Ethernet port 2 Ethernet port LEDs Table 42 describes the LEDs on the 8 port 10 100 1000BASE T GE module Table 42 8 Port 10 100 1000BASE T GE Module LEDs LED Description LINK Off The link is not connected Green The link is connected ACT Off No data is being transmitted or received Green flashing Data is being transmitted or received Specifications of the 8 port 10 100 1000BASE T GE module are described in Table 43 Table 43 Specifications for the 8 Port 10 100 1000BASE T GE Module
46. e latest information about your product If information in this guide differs from information in the release notes use the information in the Release Notes These documents are available in Adobe Acrobat Reader Portable Document Format PDF on the 3Com World Wide Web site at http www 3com com 6 ABOUT THIS GUIDE SWITCH 7750 COMPONENTS The chapter describes the following Switch 7750 components a Switch Chassis a Switch Backplane a Fabric Module a Fabric 32 Submodules a I O Modules a Power Module a Power Distribution a External PoE Power System a Fan Assembly a Switch 7750 Specifications Switch Chassis The Switch 7750 is available with a 4 slot 7 slot or 8 slot chassis Table 2 lists the hardware features of each model Table 2 Hardware Features of the Switch 7750 Models 8 Slot Chassis 4 Slot Chassis 7 Slot Chassis AC 3C16896 3C16894 3C16895 DC 3C16897 Fabric slots 1 1 2 I O module slots 3 6 6 Fan slot 1 1 2 AC DC Power module 2 3 3 slots Switch Backplane The Switch 7750 backplane is part of the integrated chassis and delivers high speed data transfer between the Fabric and I O modules The backplane bandwidth capacity is 96 Gbps The backplane supports the following functions a Interconnection of signals between modules a Provides communication channels a Hot swapping for modules a Automatic recognition of slots a Distribution of power and management of the power supply for the sys
47. ecting and Configuring Power 43 To connect DC power cords do the following Power off all the related parts of the switch when connecting the DC power cord Loosen the mounting screw and remove the cover of the connection terminals on the DC power distribution box Loosen the mounting nut of the connection terminal using a socket wrench 4 Connect the 48 V terminal with a blue wire of the DC power cord on the switch to the terminal marked with 48 V and fasten the nut Connect the grounding terminal with a black wire of the DC power cord of the switch to the return terminal and fasten the mounting nut with socket wrench 6 Cover the connection terminals and fasten the mounting screws 7 Connect the other end of the DC power cord to the connection terminal for power input to the switch Figure 33 Connecting the DC Power Cord 1 48 V input 2 Return 3 Grounding screw 4 Fastening screw The dual AC input power module uses an internal switch that automatically selects the primary power source However to select the primary power source manually do the following Connect the first power cord to the AC source or backup system that you select as the primary power source for the chassis Power on the switch The power module will receive power from the AC source you connected to Connect the second power cord to the se
48. er 70 km 43 5 mi The 4 Port 10 100 1000BASE T submodule provides four 10 100 1000 Mbps auto negotiation service ports Figure 5 illustrates the 4 port 10 100 1000BASE T submodule Figure 5 4 Port 10 100 1000BASE T Submodule 1 2 1 Ethernet port 2 Ethernet port LEDs 14 CHAPTER 1 SWITCH 7750 COMPONENTS Table 14 describes the 4 port 10 100 1000BASE T submodule LEDs Table 14 4 Port 10 100 1000BASE T Submodule LEDs LED Description LINK Off The link is not operating On The link is operating normally ACT Off No data is being transmitted or received Green flashing Data is being transmitted or received Table 15 lists specifications of the 4 port 10 100 1000BASE T submodule Table 15 4 Port 10 100 1000BASE T Submodule Specifications Specification Description Connector type RJ 45 Number of ports 4 Port speed 1000 Mbps full duplex 100 Mbps half full duplex 10 Mbps half full duplex MDI MDI X auto sensing Cable and maximum Category 5 twisted pair up to 100 m 328 ft transmission distance See Electrical Port Connector on page 78 for an illustration of the RJ 45 connector and MDI MDI X pinout details I O Modules The Switch 7750 provides multiple slots for O modules below the Fabric slots The following I O modules are supported 48 port 10 100BASE T FE PoE Module 3C 16891 48 port 10 100 1000BASE T PoE Module 3C 16890 48 port 10 100BASE TX FE Module 3C 16889 48 port 1
49. ging configuration maintenance and management You can configure the baud rate on the console port Table 6 lists console port specifications Table 6 Console Port Specifications Specification Description Port connector RJ 45 Port standard Asynchronous EIA TIA 232 Baud rate 9600 bps by default Transmission distance 15 m 45 ft Services Connects with character terminal Connects with local or remote PC serial port and runs terminal emulation on a PC a pair of modems are required for a remote connection Ethernet Port The Ethernet port on the Fabric is connected to a computer using an RJ 45 connector You can use the Ethernet port for system application downloading and debugging The Ethernet port can also be connected to devices such as a network management workstation to manage the system remotely Table 7 lists Ethernet port specifications Table 7 Ethernet Port Specifications Specification Description Port connector RJ 45 Number of port s 1 Port speed 10 Mbps half full duplex 100 Mbps half full duplex MDI MDIX auto sensing Cable and maximum transmission Category 5 twisted pair for transmission within 100 m distance 328 ft Port function Switch software upgrade and network management See Electrical Port Connector on page 78 for an illustration of the RJ 45 connector and MDI MDI X pinout details Table 8 describes the LEDs of the Ethernet port Table 8 Ethernet Port LEDs LED Descript
50. iber 1310 nm 1000BASE ZX LR SFP single mode optical fiber 1550 nm 1000BASE ZX VR SFP single mode optical fiber 1550 nm IEEE 802 3z IEEE 802 1p IEEE 802 1Q IEEE 802 1D IEEE 802 3x IEEE 802 3ad The 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP module provides 12 10 100 1000 BASE T ports and 4 1000BASE X ports Figure 22 illustrates the 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP module Figure 22 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP Module Figure 23 illustrates the front panel of the 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP module 26 CHAPTER 1 SWITCH 7750 COMPONENTS Figure 23 Front Panel of the 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP Module 3C 168916 g ee BUUERBEesSeEeegoog S FN 1 2 1 Ethernet port 2 Ethernet port LED 3 SFP port 4 SFP LED 3 4 Table 31 describes the 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP module LEDs Table 33 12 port 10 100 1000BASE T Module LEDs LED Description LINK ACT Off The port is not operating On The port is operating Green flashing The port is transmitting or receiving data Table 34 lists specifications of the 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP module Table 34 Specifications for the 12 port 10 100 1000BASE T and 4 port 1 000BASE X SFP Module Specificatio
51. ical current to the switch The power distribution box for the 4 slot chassis has two inputs and each input has a separate ON OFF switch One input can support the normal operation of one power module Both AC inputs must be connected and switched on to provide power to both power modules and to offer N 1 AC power redundancy When two power modules are installed but only one AC power input is working only one power module will operate However the power module LEDs on the Fabric display alarm information for the power module that is not working The power distribution box for the 7 slot and 8 slot chassis has two inputs and two ON OFF switches One input can support the normal operation of three AC power modules at the same time When both AC power inputs are connected and switched on the power distribution box offers N 1 AC power redundancy The Switch 7750 supports power over Ethernet PoE When the Switch 7750 is equipped with an external PoE power system and PoE capable I O modules it can provide 48 V DC power to remote powered devices PDs such as IP phones WLAN APs and network cameras through twisted pair cable Figure 30 illustrates the Switch 7750 PoE power system 34 CHAPTER 1 SWITCH 7750 COMPONENTS Fan Assembly Figure 30 Switch 7750 PoE Power Supply TA TRA Deraan e SEARE met tte ia L i Q 9 p T o The Switch 7750 supports PoE external input power up to 2400 W Tab
52. ides of the switch should be at least 0 8 meters 2 5 ft away from the walls If the optional cabinet is installed the clear height of room should be more than 3 meters 10 ft Installation Checklist When you open the packing case of the switch check the contents against the your order contract Contact your Service representative if you find any discrepancies To install the Switch 7750 you will need 40 CHAPTER 2 INSTALLING THE SWITCH 7750 Tools Phillips screwdriver Flat head screwdriver Antistatic wrist strap a Cables Console cable AUX cable Power cord and chassis ground wire Interface cables for the selected interface modules a Equipment The switch Ethernet 100BASE T Hub or LAN switch Channel service unit data service unit CSU DSU or other data communications equipment DCE equipment such as a modem Configuration terminal such as a PC Additional equipment for the selected interface modules Installing the Chassis Installing in a Standard Cabinet Installing ona Workbench 1 You can install the Switch 7750 in a standard 19 inch cabinet or on a workbench When you are ready to install the Switch 7750 in the cabinet Carry the switch to the front of the cabinet At least two people are required to move the switch 2 Put the switch on the tray or the guides and push it into the cabinet 3 Fix the switch in the cabinet with the combination screw and floating nuts that are shipped
53. ing screw on the lower right front of the power supply Connect 2 power cords to the power module 70 CHAPTER 6 MAINTAINING HARDWARE A Connect the power cords to separate AC power sources on separate power grids or to a UPS backup power system WARNING Do not power on the switch until you reconnect all the components Replacing a Power Supply AN To replace a power supply you need a An antistatic wrist strap a A screwdriver WARNING When installing or replacing the power supply when the power is on do not touch any naked wire terminal or any other part of the product labeled Dangerous Voltage Always wear the antistatic wrist strap when replacing the supply Use the following steps to replace a power supply Loosen the captive screws in the supply that you want to replace Support the power supply you are removing with one hand and gently pull the handle with the other hand until it slides out of the slot If you are not going to install another power supply in this slot install a blanking plate on the chassis for dust proofing and heat dissipation 4 Remove the new power supply from the package and check the input mode Support the power supply in one hand and hold the handle with another hand Align the supply with the guides in the chassis and slide the supply gently into the slot CAUTION As you are inserting the power supply if the pin terminal springs up the pin cannot be seated into the hole and
54. ion LINK Off The line is not connected Green The line is connected 12 CHAPTER 1 SWITCH 7750 COMPONENTS Module LEDs Power LEDs Fan LED Reset Button Table 8 Ethernet Port LEDs continued LED Description ACTIVE Green No data is being transmitted or received Green flashing Data is being transmitted or received The module LEDs show the status of the I O modules as described in Table 9 Table 9 1 O Module LEDs LED Status description RUN Green or off The module failed or has not been inserted Green flashing The module is working normally ALM Off The module is working normally or has not been inserted Green or green flashing The module failed or is not working normally PWR1 PWR2 and PWR3 LEDs show the status of the power modules as described in Table 10 Table 10 Power LEDs LED Description OK Green The corresponding power module is working normally Off The corresponding power module is not working or has not been installed FAIL Green The corresponding power module is not working Off The corresponding power module works normally or has not been installed Fan LEDs show the status of the fan frame as described in Table 11 Table 11 Fan LEDs LED Description OK Green The fan is working normally Off The fan is not working or has not been installed FAIL Green The fan is not working Off The fan is working n
55. ircuit board at locations M11 and M18 Unfasten and remove the submodule blanking plate from the Fabric 32 4 Fasten the screw with guide pin on the Fabric 32 printed circuit board at location 8 M2 1 Fasten the four hexagonal stand off bolts at M3 M4 M11 and M18 on the Fabric 32 printed circuit board Do not overtighten these bolts Position the submodule on the four hexagonal stand off bolts insuring that the guide pin on the Fabric 32 matches the guide hole of the submodule Apply pressure near the edge connectors of the submodule to insure that the submodule connector is firmly seated Insert and fasten screws into the bolts that you installed in Step 5 i gt To remove the submodule reverse this procedure 42 CHAPTER 2 INSTALLING THE SWITCH 7750 Connecting the Ground Wire gt AN Connecting and U A WN To connect the ground wire Wear an antistatic wrist strap Remove the screw from the grounding hole in the switch chassis Set the ground wire connector around the grounding screw Fasten the grounding screw in the hole on the chassis Connect the other end of the ground wire to the grounding bar of the switch If you install the switch in a cabinet 3Com recommends that the ground wire of the switch be connected to the grounding bar of the cabinet WARNING The resistance between switch chassis and the ground should be less than 1 ohm The Switch 7750 requires power connection from the A
56. ite at http csoweb4 3com com contactus Telephone Number Country Telephone Number Asia Pacific Rim Telephone Technical Support and Repair Australia Hong Kong India Indonesia Japan Malaysia New Zealand Pakistan 1 800 678515 Philippines 1235 61 266 2602 or 800 933 486 1800 1 888 9469 61 2 9424 5179 or P R of China 10800 61 00137 or 000800 650 1111 021 6350 1590 or 001 803 61009 00800 0638 3266 00531 616 439 or Singapore 800 6161 463 03 5977 7991 S Korea 080 333 3308 1800 801 777 Taiwan 00801 611 261 0800 446 398 Thailand 001 800 611 2000 61 2 9937 5083 You can also obtain support in this region using the following e mail apr_technical_support 3com com Or request a repair authorization number RMA by fax using this number 65 543 6348 Telephone Technical Support and Repair 75 Country Telephone Number Country Telephone Number Europe Middle East and Africa Telephone Technical Support and Repair From anywhere in these 44 0 1442 435529 regions call From the following countries you may use the numbers shown Austria 01 7956 7124 Luxembourg 342 0808128 Belgium 070 700 770 Netherlands 0900 777 7737 Denmark 7010 7289 Norway 815 33 047 Finland 01080 2783 Poland 00800 441 1357 France 0825 809 622 Portugal 707 200 123 Germany 01805 404 747 South Africa 0800 995 014 Hungary 06800 12813 Spain 9 021 60455 lreland 01407 3387 Sweden 07711 14453 Israel 1800 945 3794 Switzerland 08488 50112 Italy 19
57. le 45 describes the capabilities of the Switch 7750 PoE power module Table 45 PoE Power Modules Power supplied Power modules needed for Input voltage 1 Power module 2 Power module redundancy 100 to 140 V 1200 W 2400 W 3 200 to 240 V 2400 W 2 The Switch 7750 provides power through Ethernet ports on the PoE supported I O modules supporting the maximum distance of 100 m 328 ft When the Switch 7750 provides power remotely each Ethernet port can provide up to 15 4 W of power to the connected PD The fan assembly consists of two to four individual fans and is located on the right side of the chassis m 4 slot chassis 3C 16871 a 7 slot chassis 3C 16856 a 8 slot chassis 3C 16855 The fans are directly connected to the backplane through connectors Fan operation fault signals are collected and transmitted to the system alarm board through the backplane Figure 31 illustrates the fan assembly for the 7 and 8 slot chassis Switch 7750 Specifications Switch 7750 Specifications 35 Figure 31 Fan Assembly H jj i l fel j a H i Dy ih L i YA h lo F Table 46 provides detailed information about features of the Switch 7750 Table 46 Specifications for the Switch 7750 System Item
58. lication file to boot Type Y to run the primary image Do you want to run snec400 app now Yes or No Y N Y No Backup Image If you do not enter the number of a backup boot file the following text displays Please input the backup boot file number Input Error Failed to select backup image file Type Y to run the primary boot file Do you want to run snec400 app now Yes or No Y N Y Backup Image Fails f the backup image fails and another backup image configuration does not exist the Switch 7750 will try to find any valid image on the flash This image is not the primary or backup image All Images Fail f all images fail the Switch 7750 will return to the boot menu primary image snec400 app backup image SW7750 V300R app There is one passed image in addition File Number File Size bytes File Name JRA 6256229 SW7750 V300RE 8016 app Press Ctrl B to enter Boot Menu 0 AUto booting 34 4 Sh lise seniau Auto booting file is snec400 app No LPU application file lt vxworks app gt in flash Please download LPU application file vxworks app to flash No correct main file to boot loading backup image file to boot Auto booting backup file is SW7750 V300R app 60 CHAPTER 4 MAINTAINING SOFTWARE gt Upgrading Software Using Xmodem Assert at file vfs_flsh c Line 4549 There are 3 files in this package SRPU app file error backup boot file is corrupted Select a file to boot from
59. n Description CPU MPC8245 BootROM 512 KB SDRAM 256 MB Dimensions L x W 366 7 x 340 mm 14 5 x 13 4 in Power consumption 45 W Connector SFP socket Number of ports Transmission rate Ethernet cable and maximum transmission distance Compliance 12 10 100 1000BASE T Ethernet ports 4 1000BASE X SFP Ethernet ports 1000 Mbps full duplex optical port O Mbps half full duplex electrical port 00 Mbps half full duplex electrical port 000 Mbps full duplex electrical port 100 m 328 ft over category 5 twisted pair cable IEEE 802 3 IEEE 802 3u IEEE 802 3z IEEE 802 3ab IEEE 802 1p IEEE 802 1Q IEEE 802 1D IEEE 802 1X IEEE 802 1s IEEE 802 1w IEEE 802 3x IEEE 802 3ad 12 port 1000BASE X SFP and 4 port 10 100 1000BASE T Module I O Modules 27 Table 35 lists the cables for the 1000BASE X SFP ports Table 35 SFP Cables for the 12 port 10 100 1000BASE T and 4 port 1000BASE X SFP Module SFP module Central wavelength Connector Matching cable Maximum transmission distance SFP GE SX MM850 A SFP GE LX SM1310 A SFP GE LH40 SM1310 SFP GE LH40 SM1550 SFP GE LH70 SM1550 SFP GE LH100 SM155 0 SFP GE LH70 SM1470 CW SFP GE LH70 SM1490 CW SFP GE LH70 SM1510 CW SFP GE LH70 SM1530 CW SFP GE LH70 SM1550 CW SFP GE LH70 SM1570 CW SFP GE LH70 SM1590 CW SFP GE LH70 SM1610 CW SFP GE T 850nm 1310nm 1550nm 1470nm 1490nm 1510nm 1530nm 155
60. n carrying the switch Do not put fingers into the vent of the chassis when carrying the switch m Since the power handles and vent have not been designed to bear the weight of the entire chassis using them to carry the switch may damage the switch or even injure personnel Some I O modules on the Switch 7750 have optical ports Make sure that an optical connector is connected to the optical ports or a dust proof cover is fitted as invisible laser radiation can be emitted from the port WARNING Never look at the transmit LED laser through a magnifying device while it is powered on Never look directly at the fiber TX port and fiber cable ends when they are powered on General Site Requirements The environment of the installation site influences the performance and lifetime of the switch The installation site for your switch should meet the requirements described in the following sections Temperature and Humidity To ensure normal operation and to prolong the operational lifetime of the switch the temperature and humidity of the equipment room must be within controlled limits The requirements for the temperature and humidity of the switch installation site are listed in Table 47 Installation Space Installation Checklist 39 Table 47 Temperature and Humidity Requirements Temperature Relative humidity noncondensing 0 to 40 C 32 to 104 F 10 to 90 Static Electricity To prevent damage caused by the sta
61. nter The system accesses the download application file menu Set TFTP protocol parameter Set FTP protocol parameter Set XMODEM protocol parameter Return to boot menu Enter your choice 0 3 OWNH Enter 3 in the download program menu Enter your choice 0 3 3 Press Enter The system enters the download rate setting menu Please select your download baudrate 1 9600 2 19200 3 38400 4 57600 5 115200 QO Exit Enter your choice 0 5 Select the appropriate download speed For example enter 5 to select a download speed of 115200bps Press Enter The terminal displays the following information Download baudrate is 115200 bps Please change the terminal s baudrate to 115200 bps and select XMODEM protocol Press enter key when ready Change the baud rate set at the configuration terminal so that the baud rate is consistent with the selected download baud rate of the software Disconnect the terminal and reconnect it Press Enter to start downloading The terminal displays the following information Now please start transfer file with XMODEM protocol If you want to exit Press lt Ctrl X gt Waiting CCCCC Select Transfer Send File from the terminal window Click Browse in the Send file dialog box shown in Figure 42 and select the application you want to download 62 CHAPTER 4 MAINTAINING SOFTWARE 11 12 13 14 15 Upgrading Software Using TFTP Figure 42 Send File dialog
62. nter Boot Menu i gt The contents displayed on the terminal can vary with different versions of Boot ROM If you press Ctrl B immediately the system displays the Boot Menu If you do not press Ctr B the system initiates the program decompression process At this time if you want to access the BOOT Menu you must reboot the switch Press Ctrl B The system displays Initialize flash file system Please wait Password Enter the BootROM password After entering the correct password no password is set for the switch by default the system will access the BOOT Menu Boot Menu Download application file to flash Select application file to boot Display all files in flash Delete file from flash Modify bootrom password Reboot Enter your choice 0 5 H ou F WN Using the BOOT Menu 65 CAUTION While using the switch please keep in mind the modified BOOTROM A N password 66 CHAPTER 4 MAINTAINING SOFTWARE Troubleshooting the Configuration No information is displayed on the terminal The display characters are illegible TROUBLESHOOTING This chapter covers the following topics a Troubleshooting the Configuration a Troubleshooting Power a Troubleshooting the Fan a Troubleshooting the Modules The simplest way to diagnose a fault is to check the system status LEDs on the Fabric modules In addition with the DeviceMgr network management system you can also locate the fault through management software
63. o enter Boot Menu 5 is displayed To perform decompression immediately press ESC while this message is displayed If you do nothing the system enters the following auto booting port within 5 seconds Auto booting 2 Auto booting file is sw7750001 app There are 2 files in this packet FAB64 app file lt lt FAB64001l app gt gt is OK Decompress Starting at 0x60000 User interface Aux0 is available 54 CHAPTER 3 CONFIGURING THE SWITCH 7750 The display of these messages indicates the completion of the switch auto booting Press Enter and the terminal screen displays lt 3Com gt You can now begin the configuration for the Switch 7750 Upgrading Software MAINTAINING SOFTWARE This chapter covers the following topics a Upgrading Software m Lost Passwords a Using the BOOT Menu The following sections describe how to upgrade software on your Switch 7750 gt Upgrading the Software Image Upgrading Software with FTP 1 2 a Upgrading the Software Image a Upgrading Software with FTP a Upgrading Software Using The BOOT Menu a Upgrading Software Using Xmodem a Upgrading Software Using TFTP a Upgrading Software in the Secondary Fabric of the 8 slot Chassis Always save the configuration file before upgrading applications To upgrade the software image of a Switch 7750 use one of the following procedures a Upgrading Software with FTP on page 55 a Upgrading Software U
64. ode optical fiber up to 2 km 1 3 mi IEEE 802 3 IEEE 802 31 IEEE 802 3u IEEE 802 3x 20 Port The 20 Port 10 100 1000BASE T module provides 20 10 100 1000BASE T 10 100 1000BASE T auto sensing Ethernet ports Module Figure 18 illustrates the 20 Port 10 100 1000BASE T Module Figure 18 20 Port 10 100 1000BASE T Module Figure 19 illustrates the front panel of the 20 port 10 100 1000BASE T module Figure 19 Front Panel of the 20 Port 10 100 1000BASE T Module 316863 D VAY AVAVAVAY AVAVAVAY 1 Ethernet port 2 Ethernet port LED 2 Table 29 describes the 20 port 10 100 1000BASE T module LEDs Table 29 20 Port 10 100 1000BASE T Module LEDs LED Description LINK ACT Off The port is not operating On The port is operating Green flashing The port is transmitting or receiving data 24 CHAPTER 1 SWITCH 7750 COMPONENTS Table 30 lists specifications of the 20 port 10 100 1000BASE T module Table 30 Specifications for the 20 Port 10 100 1000BASE T Module Specification CPU BootROM SDRAM Dimensions L x W Power consumption Connector Number of ports Transmission rate Cable and maximum transmission distance Compliance Description MPC8241LZU200 512 KB 64 MB 366 7 x 340 mm 14 5 x 13 4 in 45 W RJ 45 20 10 Mbps half full duplex 100 Mbps half full duplex 1000 Mbps full duplex Category
65. or has not been inserted Green or green flashing The module has failed gt MAINTAINING HARDWARE This chapter covers the following topics a Replacing a Power Module a Replacing a Power Supply a Replacing O Modules a Replacing the Fan Assembly The procedures in this chapter should be performed by trained service personnel only Replacing a Power Module A Removing the AC Power Module Installing the AC Power Module To replace a power module you need a An antistatic wrist strap m A screwdriver WARNING Insure that the switch is powered off before removing or installing a power module To remove the power module do the following Power off the Switch 7750 2 Remove the power cord from both the power module and the AC power socket 3 Loosen the retaining screw that secures the power supply on the lower right front of the power supply Remove the power supplies approximately 2 inches 5 cm from the chassis to disconnect the power supply AC connectors from the AC power module 5 Loosen and remove the 4 screws at the corners of the power module 6 Remove the power module from the chassis 1 u Fk W N To install the new power module do the following Slide the replacement power module into the power module slot in the bottom rear of the chassis Insert and tighten the 4 screws at the corners of the power module Reconnect the power supplies to the power module Tighten the retain
66. ormally or has not been installed The reset button resets the entire system Fabric 32 Submodules 4 Port 1000BASE X GBIC Submodule The Fabric 32 provides a slot for one submodule The Fabric 32 supports the following submodules m 4 Port 1OOOBASE X GBIC Submodule 3C 16874 m 4 Port 10 100 1000BASE T Submodule 3C 16873 The 4 port 1000BASE X GBIC submodule provides four GE full duplex Ethernet GBIC ports Figure 4 illustrates the 4 port 1O00BASE X GBIC submodule 4 Port 10 100 1000BASE T Submodule Fabric 32 Submodules 13 Figure 4 4 Port 1000BASE X GBIC Submodule Ethernet GBIC port 2 Ethernet GBIC port LED Table 12 describes the 4 port 1000BASE X GBIC submodule LEDs Table 12 4 Port 1000BASE X GBIC Submodule LEDs LED Description LINK ACT Green The link is operating normally Off The link is not operating Green flashing Data is being transmitted or received Table 13 lists the specifications for each of the 4 port 1000BASE X GBIC submodule Table 13 4 Port 1OOOBASE X GBIC Submodule Specifications Max Optional GBIC Central Connector Interface Fiber Transmission Module Wavelength Type Specifications Distance 1000BASE SX MM 850 nm SC 50 125 um 500 m 1640 ft 3CGBIC91 multi mode fiber 220 m 722 ft 62 5 125 um Multi mode fiber 1000BASE LX SM IR 1310 nm SC 9 125 um 10 km 6 mi 3CGBIC92 Single mode fiber 1000BASE LX SM 1550 nm SC 9 125 um 40 km 25 mi 3CGBIC97 Single mode fib
67. ou feel the positioning pin on the handle bar touch the hole in the chassis Press the ejector levers inward and seat the pin on the handle bar into the positioning hole in the chassis 72 CHAPTER 6 MAINTAINING HARDWARE WARNING If the fan fails replace it with a new one without delay before AN operating the Switch 7750 Failure to do so will cause the switch to overheat OBTAINING SUPPORT FOR YOUR SWITCH Register Your Product to Gain Service Benefits To take advantage of warranty and other service benefits you must first register your product at http eSupport 3com com 3Com eSupport services are based on accounts that you create or have authorization to access First time users must apply for a user name and password that provides access to a number of eSupport features including Product Registration Repair Services and Service Request Purchase Value Added Services To enhance response times or extend warranty benefits contact 3Com or your authorized 3Com reseller Value added services can include 24x7 telephone technical support software upgrades onsite assistance or advance hardware replacement Experienced engineers are available to manage your installation with minimal disruption to your network Expert assessment and implementation services are offered to fill resource gaps and ensure the success of your networking projects More information on 3Com Extended Warranty and Professional Services is available at ht
68. pact Flash CF Port The Fabric module provides a CF port to accommodate a standard CF card where you can save logging information host version information alarming and other diagnostic information You can also use the CF port to upgrade software online 1000BASE X SFP Ports The PoE Fabric 96 provides four 1000 Mbps full duplex SFP ports Table 4 describes the SFP cables for these ports Table 4 Cables for 1000BASE T SFP Modules Maximum Central transmission SFP Module Wavelength Connector Matching Cable distance 1000BASE SX SFP 850 nm LC 50 125 um 550 m 1804 ft multimode optical fiber cable 62 125 um 275 m 902 ft multimode optical fiber cable 1 0OOOBASE LX SFP 1310 nm 9 125 um single 10 km 6 mi mode optical 1000BASE LH SFP fibercable 30 km 19 mi 1000BASE ZX LR SFP 1550 nm 40 km 25 mi 1000BASE ZX VR SFP 70 km 43 mi 1000BASE T FD SFP RJ 45 100 m 328 ft Table 8 describes the LEDs of the SFP ports Table 5 SFP Port LEDs LED Description LINK ACT Off The line is not connected Green The line is connected Green flashing Data is being transmitted or received Fabric Module 11 Console Port The console port is connected to the configuration terminal using an RJ 45 connector You can use the console port for system debugging configuration maintenance management and loading application files The console port can also be connected to a modem for functions such as remote system debug
69. rameters and open a HyperTerminal session Start the PC and select Start gt Programs gt Accessories gt Communications gt HyperTerminal The Connection Description dialog box displays as shown in Figure 37 50 CHAPTER 3 CONFIGURING THE SWITCH 7750 Figure 37 Connection Description Dialog Box Connection Description SW7750 2 Enter the name of the new connection in the Name field and click OK The dialog box shown in Figure 38 displays Select the serial port to be used from the Connect using dropdown menu Figure 38 Properties Dialog Box Connect To 3 After selecting serial ports click OK The port shown in Figure 39 displays and you can set serial port parameters Set the following parameters Baud rate 9600 a Databit 8 a Parity check none a Stopbit 1 Flow control none on oO U Setting Terminal Parameters Figure 39 COM1 Properties Dialog Box COM1 Properties Click OK The HyperTerminal dialogue box displays as shown in Figure 40 Figure 40 HyperTerminal Window Select Properties In the Properties dialog box select the Settings tab shown in Figure 41 Select V7700 in the Emulation dropdown menu Click OK 51 52 CHAPTER 3 CONFIGURING THE SWITCH 7750 Figure 41 Settings Tab SW7750 Properties Booting the Switch 7750 Before powering on the Switch 7750 verify that Power cords have been properly conne
70. rl B during the five seconds that Press Ctrl B to enter Boot Menu displays After five seconds the system begins program decompression If you want to access the BOOT Menu after this you must reboot the switch Enter the BootROM password After entering the correct password no password is set for the switch by default the system will access the BOOT Menu CAUTION While using the switch keep in mind the modified BOOTROM password Boot Menu Download application file to flash Select application file to boot Display all files in flash Delete file from flash Modify bootrom password Reboot Enter your choice 0 5 ou F WN FE Downloading an Application to Flash Memory To download an application to flash memory Select option 1 on the Boot Menu The following menu displays Set TFTP protocol parameter Set FTP protocol parameter Set XMODEM protocol parameter Return to boot menu Enter your choice 0 3 1 O wW N J Select option 1 then enter the appropriate information in the fields that display Load File name 8w7750003 app Switch IP address 10 10 110 1 Server IP address 10 10 110 50 Type Y at the download prompt so the system downloads the file to flash Are you sure to download file to flash Yes or No Y N y 4 After the download is complete select option o to return to the boot menu From the boot menu select option 2 then select the newly downloaded file 58 CHAPTER 4 MAINTAINING SOFTWARE
71. rogram is shipped on the CDROM with the Switch 7750 Before you upgrade a Verify that there is a connection between the TFTP server and the Switch 7750 use the ping command a Verify that the TFTP server is set up according to the manufacturer s instructions and that it is enabled and pointing to the correct directory To upgrade using TFP Verify that you are logged in with super user privileges From the Switch 7750 command line in user view TFTP the image file from the TFTP server to the Switch 7750 using the following command tftp lt TFTP Server IP Address gt get lt Source File image gt lt Dest File Optional gt Set the boot parameters to specify the file to boot the system from using the following command boot boot loader primary filename Reboot the system The following example illustrates this procedure lt SW7750 gt tftp 10 10 110 1 get sw7750003 app Transfer file in binary mode Now begin to download file from remote tftp server please wait TFTP 5690749 bytes received in 376 second s File downloaded successfully lt SW7750 gt boot boot loader primary sw7750003 app The specified file will be booted next time lt SW7750 gt reboot This command will reboot the system Continue Y N y After you have upgraded the software on the primary Fabric in an 8 slot chassis you must copy the software to the secondary Fabric Copy the code to the secondary Fabric lt SW 7700 8 slot gt copy slot
72. sing The BOOT Menu page 56 a Upgrading Software Using Xmodem page 60 a Upgrading Software Using TFTP page 62 Use the following procedure to upgrade software with FTP Log in to the system with super user privileges From the SW7750 command line transfer the file from the FTP server to the system using the tp command Specify the file to boot the system from using the boot command 4 Reboot the system using the reboot command The following example illustrates this procedure lt SW7750 gt su Password Now user privilege is 3 level and just commands which level is equal to or less than this level can be used 56 CHAPTER 4 MAINTAINING SOFTWARE Upgrading Software Using The BOOT Menu Privilege note O VISIT 1 MONITOR 2 SYSTEM 3 MANAGE lt SW7750 gt ftp 10 10 110 1 Trying Press CTRL K to abort Connected 220 3Com 3CDaemon FTP Server Version 2 0 User none anonymous 331 User name ok need password Password XXXXXXX 230 User logged in ftp bin 200 Type set to I ftp get sw7750003 app 200 PORT command successful 150 File status OK about to open data connection 226 Closing data connection File transfer successful FTP 3794803 byte s received in 130 480 second s 29 08Kbyte s sec ftp quit 221 Service closing control connection lt SW7750 gt boot boot loader primary sw7750003 app The specified file will be booted next time lt SW7750 gt reboot This will reboot Swit
73. tem 8 CHAPTER 1 SWITCH 7750 COMPONENTS Fabric Module There are three Fabric modules for the Switch 7750 a Fabric 64 3C 16857 or 3C16857R a Fabric 32 3C 16872 a PoE Fabric 96 3C 16886 The Fabric 64 and Fabric 32 are not interchangeable You can install the Fabric 32 only in a 4 slot chassis You can install the Fabric 64 only in the 7 slot or 8 slot chassis You can install the PoE Fabric 96 in all three chassis The Fabric module is the core of Switch 7750 system It has the following functions a Connects the I O modules through the backplane and forwards Layer 2 and Layer 3 data a Manages and calculates routing a Performs the switch s software upgrade and system reset functions a Monitors system power and the fan frame Figure 1 illustrates the front panel of the PoE Fabric 96 Figure 1 PoE Fabric 96 3C16886 m 1 Compact Flash port 2 1000BASE X SFP ports 3 Console port 4 Ethernet port 5 Ethernet port LEDs 6 Fan LEDs 7 Power LEDs 8 I O module LEDs 9 Reset button Figure 2 illustrates the front panel of the Fabric 64 Figure 2 Fabric 64 PELE SIPEG ti hs 1 Reset button 2 Console port 3 Ethernet port 4 Ethernet port LEDs Submodule Slot 5 Fan LEDs 6 Power module LEDs 7 I O module LEDs Fabric Module 9 Figure 3 illustrates the front panel
74. the num is 1 the num is 2 File SW7750 V300RE 8016 app is selected for autoBoot backup file is SW7750 V300RE 8016 app There are 3 files in this package SRPU app file lt lt FAB64R app gt gt is OK Decompress Starting at 0x60000 The primary image name is saved in flash memory the secondary image name is saved in the EPPROM However if you use the display boot command to display the boot image it will only read from flash so only the primary image will be displayed The secondary boot image name cannot be displayed when there is an image error The Xmodem protocol transmits files through serial ports and supports both 128 byte and 1K byte packets Xmodem also supports two types of check normal checksum and CRC When there is a packet error retransmission is supported normally 10 times The Xmodem protocol completes transmission by receiving and sending programs The receiving program first sends the negotiating characters to negotiate the check means After passing the negotiation the sending program begins to send the packet The receiving program checks the packet according to the negotiated means after receiving a complete packet The acknowledgement characters are sent after passing the check and then the sending program continues to send the next Upgrading Software 61 packet If the check fails negative characters are sent and the sending program sends the packet again Enter 1 in the BOOT Menu and press E
75. the system will sound an alarm If the power supply has not been inserted properly you should slide it out and insert it again to avoid breaking or cracking the power terminals Fasten the captive screws CAUTION If the captive screws cannot be fastened the power supply may not have been properly seated Remove and replace the supply Over time the filter on the power supply accumulates dust which interferes with the heat dissipation of the chassis It is important to periodically clean the filter as described below Remove the gauze filter by gently pulling it from the front of the power supply 2 Take the filter to a fresh water supply and clean it 3 Leave the filter to dry Do not use heat to dry the filter as this may cause it to distort When the filter is completely dry gently push it back into the front of the power module CAUTION Do not clean the filter while it is in position at the front of the power supply Attempts to do so could result in damage to the equipment or severe electrical shock Replacing I O Modules 71 Replacing I O Modules To replace an I O module you need a An antistatic wrist strap A Screwdriver To remove a module Remove all the cables from the module to be removed 2 Loosen the captive screws 3 Hold the ejector levers on the module with both hands and press them toward both sides to separate the connectors of the module from the motherboard 4 Gently slide the module
76. tic cable connector Figure 48 The MT RJ Fiber Connector Figure 49 illustrates the LC connector Figure 49 LC Connector
77. tic electricity ensure that The equipment is grounded ma The equipment room is dust proof a Adequate temperature and humidity conditions are maintained a The operator wears an antistatic wrist strap while handling the module a The module is placed upward on the antistatic workbench or put into an antistatic bag a Avoid direct contact with the elements of the circuit board Electromagnetic Discharge To prevent damage by electromagnetic discharge do the following a Take effective measures against electrical interference for the power supply system Separate the working ground of the switch from the grounding device of the power equipment or lightning conductor a Adopt electromagnetic shielding if necessary Lightning Damage To minimize the risk of lightning damage do the following a Install a lightning arrester on the input end of a telephone cable or other external line a Ensure that the PGND wire of the chassis is well grounded a Ensure that the neutral point of the socket of AC power supply is well grounded a Install a lightning arrester at the input end of the power supply The Switch 7750 is a complex piece of equipment so it is necessary to make arrangements for the installation position power supply and cabling For better heat dissipation and equipment maintenance 3Com recommends that you keep the front and back of the switch more than 1 meter 3 feet away from the walls or other devices The s
78. tp www 3com com Contact your authorized 3Com reseller or 3Com for additional product and support information Troubleshoot Online You will find support tools posted on the 3Com web site at http www 3com com a 3Com Knowledgebase helps you troubleshoot 3Com products This query based interactive tool is located at http knowledgebase 3com com and contains thousands of technical solutions written by 3Com support engineers a Connection Assistant helps you install configure and troubleshoot 3Com desktop and server NICs wireless cards and Bluetooth devices This diagnostic software is located at http www 3com com prodforms software connection assistant ca_ th ankyou html Access Software Downloads Software Updates are the bug fix maintenance releases for the version of software initially purchased with the product In order to access these Software Updates you must first register your product on the 3Com web site at http eSupport 3com com First time users will need to apply for a user name and password A link to software downloads can be found at http eSupport 3com com or under the Product Support heading at http www 3com com 74 CHAPTER B OBTAINING SUPPORT FOR YOUR SWITCH Software Upgrades are the software releases that follow the software version included with your original product In order to access upgrades and related documentation you must first purchase a service contract from 3Com or your

3Com 3C16894 4-slot Chassis Switch User Manual

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