Cisco Systems CE-100T-8 User's Manual
Contents
1. The number of available circuits and total combined bandwidth for the CE 100T 8 depends on the combination of circuit sizes configured Table 16 5 shows the circuit size combinations available for CE 100T 8 CCAT high order circuits on the ONS 15310 CL Table 16 6 shows the circuit size combinations available for CE 100T 8 VCAT high order circuits on the ONS 15310 CL Cisco ONS 15310 CL Ethernet Card Softw are Feature and Configuration Guide R5 0 a J une 2005 l Chapter 16 CE 100T 8 Ethernet Operation CE 100T 8 SONET Circuits and Features W Table 16 5 CCAT High Order Circuit Size Combinations Number of STS 3c Circuits Maximum Number of STS 1 Circuits None 6 1 3 2 None Table 16 6 VCAT High Order Circuit Size Combinations Number of STS 1 3v Circuits Maximum Number of STS 1 2v Circuits None 2 1 1 2 None The CE 100T 8 supports up to eight low order VCAT circuits The available circuit sizes are VT1 5 nv where n ranges from to 64 The total number of VT members cannot exceed 168 VT1 5s with each of the two pools on the card supporting 84 VT1 5s The user can create a maximum of two circuits at the largest low order VCAT circuit size VT1 5 64v A user can combine CCAT high order VCAT high order and VCAT low order circuits in any way as long as there is a maximum of eight circuits and the mapper chip bandwidth restrictions are observed The following table details the maximum density servic2. frames being sent and received by CE 100T 8 cards and attached switches Figure 16 2 Flow Control ONS 15310 CL ONS 15310 CL Ethernet Ethernet es B int E Do lt gt Pause Frames gt Pause Frames 115795 Q This flow control mechanism matches the sending and receiving device throughput to that of the bandwidth of the STS circuit For example a router might transmit to the Ethernet port on the CE 100T 8 card This particular data rate might occasionally exceed 51 84 Mbps but the SONET circuit assigned to the CE 100T 8 port might be only STS 1 51 84 Mbps In this example the CE 100T 8 sends out a pause frame and requests that the router delay its transmission for a certain period of time With flow control and a substantial per port buffering capability a private line service provisioned at less than full line rate capacity STS 1 is efficient because frame loss can be controlled to a large extent Ethernet Link Integrity Support The CE 100T 8 supports end to end Ethernet link integrity Figure 16 3 This capability is integral to providing an Ethernet private line service and correct operation of Layer 2 and Layer 3 protocols on the attached Ethernet devices End to end Ethernet link integrity means that if any part of the end to end path fails the entire path fails It disables the Ethernet port on the CE 100T 8 card if the remote Ethernet port is unable to transmit over the SONET network or if t
3. CE 100T 8 Ethernet Operation This chapter covers the operation of the CE 100T 8 Carrier Ethernet card supported on the ONS 15310 15310 CE 100T 8 A CE 100T 8 card is also supported on the ONS 15454 15454 CE 100T 8 Provisioning is done through Cisco Transport Controller CTC or Transaction Language One TL1 Cisco IOS is not supported on the CE 100T 8 card For Ethernet card specifications refer to the Cisco ONS 15310 CL Reference Manual For step by step Ethernet card circuit configuration procedures and hard reset and soft reset procedures refer to the Cisco ONS 15310 CL Procedure Guide Refer to the Cisco ONS SONET TL1 Command Guide for TL1 provisioning commands For specific details on ONS 15310 CL Ethernet card interoperability with other ONS platforms refer to the POS on ONS Ethernet Cards chapter of the Ethernet Card Software Feature and Configuration Guide for the ONS 15454 SDH ONS 15454 and ONS 15327 Chapter topics include e CE 100T 8 Overview page 16 1 CE 100T 8 Ethernet Features page 16 2 CE 100T 8 SONET Circuits and Features page 16 6 CE 100T 8 Overview The CE 100T 8 is a Layer 1 mapper card with eight 10 100 Ethernet ports It maps each port to a unique SONET circuit in a point to point configuration Figure 16 1 illustrates a sample CE 100T 8 application In this example data traffic from the Fast Ethernet port of a switch travels across the point to point circuit to the Fast Ethernet port of another swi
4. T Allocation Tab Soi Fie Edt View Tools Help T alal aelel e el lelxlal elx 15310 slot 1 CE 100T 8 Port 3 POS Dowm E Port 4 P0S Dom Port 5 POS Dom Port 6 POS Dowm Port 7 P05 Dowm CE 100T 8 Port 8 PO Dowm Port 1 ETHER Dowm Port 2 ETHER Dowm Port 3 ETHER Dowm Port 4 ETHER Dowm Port 5 ETHER Dowm Port 6 ETHER Dowm Port 7 ETHER Dowm Port 8 ETHER Down Alarms Conditions History Circuits Provisioning Maintenance performance Path Trace POS Port Map Pool Utilization Loopback Port Allocation Pool Pool Type Usage _ Avaitabie STSIVT Allocation pos STS CCAT 1 q sts 3of3 No 2 POS 1 STS CCAT 4 VT 7 of 84 Nes 3 POS ESTS CCAT 4 5 POS 7 VTs VCAT NON LCAS 2 lt Refresh Refreshed November 1 2004 3 27 37 PMPST Help F NET CKT N Port 5 belongs to Pool 2 For example if a user needs to provision an STS 3c or STS 1 3v on the CE 100T 8 card shown in Figure 16 4 an STS 3c or STS 1 3v worth of bandwidth is not available from either of the two pools The user needs to delete circuits from the same pool to free up bandwidth If the bandwidth is available but scattered among the pools the circuit cannot be provisioned Looking at the POS Port Map table the user can determine which circuits belong to which pools The Pool and Port columns in Figure 16 4 show that the circuit on port 5 is drawn fro
5. The CE 100T 8 card features remote monitoring RMON that allows network operators to monitor the health of the network with a network management system NMS The CE 100T 8 uses the ONG RMON The ONG RMON contains the statistics history alarms and events MIB groups from the standard RMON MIB as well as Simple Network Management Protocol SNMP A user can access RMON threshold provisioning through TL1 or CTC For RMON threshold provisioning with CTC see the Cisco ONS 15310 CL Procedure Guide and the Cisco ONS 15310 CL Troubleshooting Guide For TL1 information see the Cisco ONS SONET TL Command Guide J une 2005 Cisco ONS 15310 CL Ethernet Card Softw are Feature and Configuration Guide R5 0 E Chapter 16 CE 100T 8 Ethernet Operation HE sCCE 100T 8 SONET Circuits and Features Statistics and Counters The CE 100T 8 has a full range of Ethernet and POS statistics under Performance gt Ether Ports or Performance gt POS Ports These are detailed in the Performance Monitoring chapter of the Cisco ONS 15310 Reference Manual CE 100T 8 SONET Circuits and Features The CE 100T 8 has eight POS ports numbered one through eight which are exposed to management with CTC or TL1 Each POS port is statically mapped to a matching Ethernet port By clicking the card level Provisioning tab gt POS Ports tab the user can configure the Administrative State Framing Type and Encapsulation Type By clicking the card level Performance ta
6. ady existing in the data network attached to the CE 100T 8 The QoS treatment is applied to both Ethernet and POS ports Any packet or frame with a priority greater than the set threshold is treated as priority traffic This priority traffic is sent to the priority queue instead of the normal queue When buffering occurs packets on the priority queue preempt packets on the normal queue This results in lower latency for the priority traffic which is often latency sensitive traffic such as VoIP Because these priorities are placed on separate queues the priority queuing feature should not be used to separate rate based CIR EIR marked traffic sometimes done at a Metro Ethernet service provider edge This could result in out of order packet delivery for packets of the same application which would cause performance issues with some applications For an IP ToS tagged packet the CE 100T 8 can map any of the 256 priorities specified in IP ToS to priority or best effort The user can configure a different ToS on CTC at the card level view under the Provisioning gt Ether Ports tabs Any ToS class higher than the class specified in CTC is mapped to the priority queue which is the queue geared towards low latency By default the ToS is set to 255 which is the highest ToS value This results in all traffic being treated with equal priority by default Table 16 3 shows which values are mapped to the priority queue for sample IP ToS settings ToS setti
7. anual Autonegotiation Flow Control and Frame Buffering On the CE 100T 8 Ethernet link autonegotiation is on by default The user can also set the link speed duplex and flow control manually under the card level Provisioning tab of CTC The CE 100T 8 supports IEEE 802 3x flow control and frame buffering to reduce data traffic congestion Flow control is on by default To prevent over subscription buffer memory is available for each port When the buffer memory on the Ethernet port nears capacity the CE 100T 8 uses IEEE 802 3x flow control to transmit a pause frame to the attached Ethernet device Flow control and autonegotiation frames are local to the Fast Ethernet interfaces and the attached Ethernet devices These frames do not continue through the POS ports Cisco ONS 15310 CL Ethernet Card Softw are Feature and Configuration Guide R5 0 P62 E June 2005 Chapter 16 CE 100T 8 Ethernet Operation CE 100T 8 Ethernet Features Wi The CE 100T 8 card has symmetric flow control and proposes symmetric flow control when autonegotiating flow control with attached Ethernet devices Symmetric flow control allows the CE 100T 8 cards to respond to pause frames sent from external devices and to send pause frames to external devices The pause frame instructs the source to stop sending packets for a specific period of time The sending station waits the requested amount of time before sending more data Figure 16 2 illustrates pause
8. b gt POS Ports tab the user can view the statistics utilization and history for the POS ports Available Circuit Sizes and Combinations Each POS port terminates an independent contiguous SONET concatenation CCAT or virtual SONET concatenation VCAT The SONET circuit is created for these ports through CTC or TL1 in the same manner as a SONET circuit for a non Ethernet line card Table 16 3 shows the circuit sizes available for the CE 100T 8 on the ONS 15310 CL Table 16 3 CE 100T 8 Supported Circuit Sizes CCAT High Order VCAT High Order VCAT Low Order STS 1 STS 1 lv VT1 5 nV n 1 to 64 STS 3c STS 1 2v STS 1 3v A single circuit provides a maximum of 100 Mbps of throughput even when an STS 3c circuit which has a bandwidth equivalent of 155 Mbps is provisioned This is due to the hardware restriction of the Fast Ethernet port A VCAT circuit is also restricted in this manner Table 16 3 shows the minimum SONET circuit sizes required for 10 Mbps and 100 Mbps wire speed service Table 16 4 SONET Circuit Size Required for Ethemet Wire Speeds Ethernet Wire Speed CCAT High Order VCAT High Order VCAT Low Order Line Rate 100BaseT STS 3c STS 1 3v STS 1 2v Not applicable Sub Rate 100BaseT STS 1 STS 1 lv VT1 5 xV x 1 64 Line Rate 10BaseT STS 1 Not applicable VT1 5 7V Sub Rate 10BaseT Not applicable Not applicable VT1 5 xV x 1 6 STS 1 2v provides a total transport capacity of 98 Mbps
9. d allows independent routing and protection preferences for each member of a VCAT circuit The user can also control the amount of VCAT circuit capacity that is fully protected unprotected or if the circuit is on a bidirectional line switched ring BLSR uses protection channel access PCA Alarms are supported on a per member as well as per virtual concatenation group VCG basis The maximum tolerable VCAT differential delay for the CE 100T 8 is 48 milliseconds The VCAT differential delay is the relative arrival time measurement between members of a virtual concatenation group VCG CE 100T 8 POS Encapsulation Framing and CRC The CE 100T 8 uses Cisco EoS LEX LEX LEX is the primary encapsulation of ONS Ethernet cards In this encapsulation the protocol field is set to the values specified in Internet Engineering Task Force IETF Request For Comments RFC 1841 The user can provision GPF F framing default or high level data link control HDLC framing With GFP F framing the user can also configure a 32 bit CRC the default or no CRC none When LEX is used over GFP F it is standard Mapped Ethernet over GFP F according to ITU T G 7041 HDLC framing provides a set 32 bit CRC Figure 16 5 illustrates CE 100T 8 framing and encapsulation Figure 16 5 ONS CE 100T 8 Encapsulation and Framing Options GFP F Frame Types GFP Mapped LEX Encaps
10. e combinations Table 16 7 CE 100T 8 Maximum Service Densities Service STS 3c or Number of Active Combination STS 1 3v STS 1 2v STS 1 VT1 5 xV x 1 7 Service 1 2 0 0 0 2 2 1 1 1 0 3 3 1 0 3 0 4 4 1 0 0 7 x 1 12 8 5 0 2 2 0 4 6 0 1 1 6 x 1 14 8 7 0 1 0 7 x 1 12 8 8 0 0 6 0 6 9 0 0 3 5 x 1 16 8 10 0 0 0 8 x 1 21 8 This LO VCAT Circuit combination is achievable if the first circuit created on the card is an LO VCAT circuit If the first circuit created on the card is HO VCAT or CCAT STS circuits then a maximum of six LO VCAT circuits can be added on the card I June 2005 Cisco ONS 15310 CL Ethernet Card Software Feature and Configuration Guide R5 0 Chapter 16 CE 100T 8 Ethernet Operation HE sCCE 100T 8 SONET Circuits and Features CE 100T 8 STS VT Allocation Tab The CE 100T 8 has two pools each with a maximum capacity of three STSs At the CTC card level view under the Maintenance tab the STS VT Allocation tab displays how the provisioned circuits populate the two pools This information can be useful in freeing up the bandwidth required for provisioning a circuit if there is not enough existing capacity on any one pool for provisioning the desired circuit The user can look at the distribution of the existing circuits among the two pools and decide which circuits to delete in order to free up space for the desired circuit Figure 16 4 CE 100T 8 STS V
11. e defect indication RDI Jl path trace for high order paths J2 path trace for low order paths J2 path trace for low order VCAT circuits at the member level Extended signal label for the low order paths Cisco ONS 15310 CL Ethernet Card Softw are Feature and Configuration Guide R5 0 P1610 i June 2005
12. g commands CE 100T 8 Ethernet Features The CE 100T 8 card has eight front end Ethernet ports which use standard RJ 45 connectors for 10BASE T Ethernet 100BASE TX Ethernet media Ethernet Ports 1 through 8 each map to a POS port with a corresponding number The console port on the CE 100T 8 card is not functional The CE 100T 8 cards forward valid Ethernet frames unmodified over the SONET network Information in the headers is not affected by the encapsulation and transport For example included IEEE 802 1Q information will travel through the process unaffected The ONS 15454 CE 100T 8 and the ONS 15310 CE 100T 8 support maximum Ethernet frame sizes of 1600 bytes including the CRC The MTU size is not configureable and is set at a 1500 byte maximum standard Ethernet MTU Baby giant frames in which the standard Ethernet frame is augmented by 802 1 Q tags or MPLS tags are also supported Full Jumbo frames 9000 byte maximum are not supported The CE 100T 8 cards discard certain types of erroneous Ethernet frames rather than transport them over SONET Erroneous Ethernet frames include corrupted frames with cyclic redundancy check CRC errors and undersized frames that do not conform to the minimum 64 byte length Ethernet standard Note Many Ethernet attributes are also available through the network element default feature For more information on NE defaults refer to the Network Element Defaults appendix in the Cisco ONS 15454 Reference M
13. he remote Ethernet port is disabled Failure of the entire path is ensured by turning off the transmit pair at each end of the path The attached Ethernet devices recognize the disabled transmit pair as a loss of carrier and consequently an inactive link or link fail Figure 16 3 End to End Ethemet Link Integrity Support Ethernet port Ethernet port Ni ONS 310 STS N ONS 310 n gt oo Bet 115796 June 2005 Cisco ONS 15310 CL Ethernet Card Software Feature and Configuration Guide R5 0 Chapter 16 CE 100T 8 Ethernet Operation HI CE 100T 8 Ethernet Features amp Note Some network devices can be configured to ignore a loss of carrier condition If a device configured to ignore a loss of carrier condition attaches to a CE 100T 8 card at one end alternative techniques such as use of Layer 2 or Layer 3 keep alive messages are required to route traffic around failures The response time of such alternate techniques is typically much longer than techniques that use link state as indications of an error condition IEEE 802 19 CoS and IP ToS Queuing The CE 100T 8 references IEEE 802 1Q class of service CoS thresholds and IP type of service ToS IP Differentiated Services Code Point DSCP thresholds for priority queueing CoS and ToS thresholds for the CE 100T 8 are provisioned on a per port level This allows the user to provide priority treatment based on open standard quality of service QoS schemes alre
14. m Pool 2 and no other circuits are drawn from Pool 2 Deleting this one circuit will free up an STS 3c or STS 1 3v worth of bandwidth from a single pool The POS Port table has a row for each port with three columns Figure 16 4 They show the port number the circuit size and type and the pool it is drawn from The Pool Utilization table has two columns and shows the pool number the type of circuits on that pool how much of the pool s capacity is being used and whether additional capacity is available Cisco ONS 15310 CL Ethernet Card Software Feature and Configuration Guide R5 0 Pies E June 2005 Chapter 16 CE 100T 8 Ethernet Operation CE 100T 8 SONET Circuits and Features Ml CE 100T 8 VCAT Characteristics KA Note The ML 100T 8 card and the CE 100T 8 card both the ONS 15310 CL version and the ONS 15454 SONET SDH version have hardware based support for the ITU T G 7042 standard link capacity adjustment scheme LCAS This allows the user to dynamically resize a high order or low order VCAT circuit through CTC or TL1 without affecting other members of the VCG errorless ML 100T 8 LCAS support is high order only and is limited to a two member VCG The ONS 15454 SONET SDH ML Series card has a software based LCAS SW LCAS scheme This scheme is also supported by both the ML 100T 8 card and both versions of the CE 100T 8 but only for circuits terminating on a ONS 15454 SONET SDH ML Series card The CE 100T 8 car
15. nd the CoS setting lower than 7 default for CoS and ToS priority queueing to be active A ToS setting of 255 default disables ToS priority queueing so in this case the CoS setting would be used Ethernet frames with VLAN tagging use CoS based priority queueing if both ToS and CoS are active on the card The ToS setting is ignored CoS based priority queueing is disabled if the CoS setting is the 7 default so in this case the ToS setting would be used If the CE 100T 8 card s ToS setting is 255 default and the CoS setting is 7 default priority queueing is not active on the card and data gets sent to the default normal traffic queue Also if data is not tagged with a ToS value or a CoS value before it enters the CE 100T 8 card it gets sent to the default normal traffic queue Note 2 Priority queuing has no effect when flow control is enabled default on the CE 100T 8 Under flow control a 6 kilobyte single priority first in first out FIFO buffer fills then a PAUSE frame is sent This results in the packet ordering priority becoming the responsibility of the external device which is buffering as a result of receiving the PAUSE flow control frames Priority queuing has no effect when the CE 100T 8 is provisioned with STS 3C circuits The STS 3c circuit has more data capacity than Fast Ethernet so CE 100T 8 buffering is not needed Priority queuing only takes effect when buffering occurs RMON and SNMP Support
16. ngs span the full 0 to 255 range but only selected settings are shown Table 16 1 IP ToS Priority Queue Mappings ToS Setting in CTC ToS Values Sent to Priority Queue _ 255 default None 250 251 255 150 151 255 100 101 255 50 51 255 0 1 255 For a CoS tagged frame the CE 100T 8 can map the eight priorities specified in CoS to priority or best effort The user can configure a different CoS on CTC at the card level view under the Provisioning gt Ether Ports tabs Any CoS class higher than the class specified in CTC is mapped to the priority queue which is the queue geared towards low latency By default the CoS is set to 7 which is the highest CoS value This results in all traffic being treated with equal priority by default Table 16 3 shows which values are mapped to the priority queue for CoS settings Cisco ONS 15310 CL Ethernet Card Softw are Feature and Configuration Guide R5 0 Pies E June 2005 Chapter 16 CE 100T 8 Ethernet Operation CE 100T 8 Ethernet Features W Table 16 2 CoS Priority Queue Mappings CoS Setting in CTC CoS Values Sent to Priority Queue 7 default none 6 T 5 6 7 4 5 6 7 3 4 5 6 7 2 3 4 5 6 7 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 Ethernet frames without VLAN tagging use ToS based priority queueing if both ToS and CoS priority queueing is active on the card The CE 100T 8 card s ToS setting must be lower than 255 default a
17. tch Figure 16 1 CE 100T 8 Point to Point Circuit Ethernet etn y Ethernet Point to Point Circuit T GB g Wry EP The CE 100T 8 cards allow you to provision and manage an Ethernet private line service like a traditional SONET line CE 100T 8 card applications include providing Ethernet private line services and high availability transport 115797 Cisco ONS 15310 CL Ethernet Card Software Feature and Configuration Guide R5 0 1 jane 208 Bic Chapter 16 CE 100T 8 Ethernet Operation HE CE 100T 8 Ethernet Features The CE 100T 8 card supports ITU T G 707 and Telcordia GR 253 based standards for SONET It offers a carrier class level of features and reliability This includes errorless O msec impact on traffic reprovisioning When circuit or port provisioning takes place this operation does not affect the performance of other ports and circuit configurations that are already established on the card Software upgrades are errorless However when the CE 100T 8 firmware is upgraded the upgrade has an effect on traffic similar to the effect of a hard reset on the CE 100T 8 A software upgrade or a firmware upgrade does not affect the existing provisioning of the ports and circuits on the CE 100T 8 card Span upgrades are hitless Protection and maintenance switches are also hitless The CE 100T 8 offers full TL1 based provisioning capability Refer to the Cisco ONS SONET TLI Command Guide for CE 100T 8 TL1 provisionin
18. ulation Ethernet LEX Flag Address Control Protocol Payload FCS Core Payload Payload FCS Header Header HDLC Framing Mode or GFP F Framing Mode Transport Overhead SONET SDH Payload Envelope l SONET SDH Frame Cisco ONS 15310 CL Ethernet Card Softw are Feature and Configuration Guide R5 0 I J une 2005 ECN Chapter 16 CE 100T 8 Ethernet Operation HE sCCE 100T 8 SONET Circuits and Features The CE 100T 8 card supports GFP F null mode GFP F CMFs are counted and discarded The CE 100T 8 card is interoperable with the ML 100T 8 card and several other ONS Ethernet cards For specific details on ONS Ethernet card interoperability refer to the POS on ONS Ethernet Cards chapter of the Ethernet Card Guide Software Feature and Configuration Guide for the ONS 15454 ONS 15454 SDH and ONS 15327 CE 100T 8 Loopback J 1 Path Trace and SONET Alarms The CE 100T 8 card supports terminal and facility loopbacks when in the Out of Service Maintenance state OOS MT It also reports SONET alarms and transmits and monitors the J1 Path Trace byte in the same manner as OC N cards Support for path termination functions includes H1 and H2 concatenation indication C2 signal label Bit interleaved parity 3 BIP 3 generation Gl path status indication C2 path signal label read write Path level alarms and conditions including loss of pointer unequipped payload mismatch alarm indication signal AIS detection and remot
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