Cisco ATM Services (AUSM/MPSM-8-T1E1) Configuration Guide and Command Reference for MGX Switches, Release 5.2 - Introduction [Cisco MGX 8800 Series Switches]

Table Of Contents

Introduction

Changes to this Document Since Release 5.1

ATM Cell Bus Service Module Card Types

MPSM Card Common Features

MPSM-8T1E1 Card Common Features

MPSM-8T1-ATM Card Features

MPSM-8E1-ATM Card Features

MPSM-8T1E1 Card Differences

Eight Port AUSM and MPSM Card Features

AUSM and MPSM-8T1E1-ATM Common Card Features

Inverse Multiplexing over ATM

T1/E1 Clocking Mechanism

SRM Card Services

Overview of the SRM Card

SRM Card Features

Introduction

This chapter introduces the ATM UNI Service Module (AUSM) and Multiprotocol Service Module (MPSM) cards that are supported in Cisco MGX Release 5.1 and Cisco MGX Release 1.3. This chapter also introduces the Service Resource Module (SRM), which provides services to both the AUSM and MPSM cards.

The features of the AUSM, MPSM, and SRM cards are described in following sections:

•"ATM Cell Bus Service Module Card Types"

•"MPSM-8T1E1 Card Common Features"

•"MPSM-8T1E1 Card Differences"

•"SRM Card Services"

AUSM and MPSM cards are supported by the PXM1, PXM1E, and PXM45 processor cards in Cisco MGX 8230, Cisco MGX 8250, Cisco MGX 8850 (PXM1), Cisco MGX 8850 (PXM1E/PXM45), and Cisco MGX 8830 (PXM1E/PXM45) switches.

Note See Table 1-3 for details about which processor cards are supported in each switch.

Changes to this Document Since Release 5.1

Table 1-1 summarizes the changes made to this document since Release 5.1.

Table 1-1 Changes to This Guide Since Release 5.1

Section and Link

Status

Description

Book title

Update

Change MPSM in the title to MPSM-8-T1E1 to avoid confusion with the Cisco ATM and Frame Relay Services (MPSM-T3E3-155 and MPSM-16-T1E1) Configuration Guide and Command Reference for MGX Switches, Release 5.2 book.

ATM Cell Bus Service Module Card Types

Update

Add MPSM-16-T1E1 and MPSM-T3E3-155 to supported cards in Table 1-3.

Add PXM45/C to supported controllers in Table 1-3.

Add MGX 8830/B to supported chassis in Table 1-3.

ATM Cell Bus Service Module Card Types

The AUSM and MPSM cards documented in this manual are the single-height AUSM-8-T1/B, AUSM-8-E1/B, MPSM-8T1-ATM, and MPSM-8E1-ATM cell bus service modules.

When the MPSM card is functioning as a T1 ATM card, it is called the MPSM-8T1-ATM. When the MPSM card is functioning as an E1 ATM card, it is called the MPSM-8E1-ATM. The MPSM card is an Any Service Any Card (ASAC) service module that can also be configured to run as a Circuit Emulation card or as a Frame Relay card. Note that this document provides procedures for configuring the MPSM card to function as an ATM card only. To configure the MPSM card to function as a Circuit Emulation card, see the Cisco Circuit Emulation Services (CESM/MPSM-8-T1E1) Configuration Guide and Command Reference for MGX Switches, Release 5.2. To configure the MPSM card to function as a Frame Relay card, see the Cisco Frame Relay Services (FRSM/MPSM-8-T1E1) Configuration Guide and Command Reference for MGX Switches, Release 5.2.

Note The MPSM card supports one service at a time only. For example, an MPSM card that is configured for ATM cannot run Frame Relay simultaneously. For more information about configuring the service on an MPSM card, see the Cisco MGX 8800/8900 Series Configuration Guide, Release 5.2.

When operating under the control of the PXM1 or PXM1E processor card, the Cisco MGX 8230, Cisco MGX 8250, Cisco MGX 8850 (PXM1), Cisco MGX 8850 (PXM1E/PXM45), and Cisco MGX 8830 switches support the AUSM and MPSM cards listed in Table 1-2.

Table 1-2 ATM Cell Bus Service Module Card Types Supported by PXM1E Controllers

Front Card

Back Card

Maximum Ports

Maximum Connections

AUSM-8T1/B

RJ48-8T1, R-RJ48-8T1

8

1000

AUSM-8E1/B

RJ48-8E1,
SMB-8E1,
R-RJ48-8E1,
R-SMB-8E1

8

1000

MPSM-8T1-ATM

RJ48-8T1, R-RJ48-8T1

8

1000

MPSM-8E1-ATM

RJ48-8E1, SMB-8E1, R-RJ48-8E1, R-SMB-8E1

8

1000

The R- RJ48-8T1, R-RJ48-8E1, and R-SMB-8E1-R back cards support 1:N redundancy through the optional MGX-SRM-3T3/C, SRME, and SRME/B cards.

Table 1-3 shows which processor cards and switches support each type of AUSM and MPSM.

Table 1-3 AUSM and MPSM Cards Supported by PXM1 and PXM1E Controllers

MGX 8230,
MGX 8250

MGX 8850

MGX 8830

MGX 8830/B

Service Module

PXM1

PXM1

PXM45

PXM45/B

PXM45/C

PXM1E

PXM1E

PXM45/C

AUSM-8T1/B

Yes

Yes

No

Yes

Yes

Yes

Yes

No

AUSM-8E1/B

Yes

Yes

No

Yes

Yes

Yes

Yes

No

MPSM-8T1E1

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

MPSM-16-T1E1

No

No

No

Yes

Yes

Yes

Yes

Yes

MPSM-T3E3-155

No

No

No

Yes

Yes

Yes

Yes

Yes

These cards provide T1 or E1 ATM UNI/NNI interfaces that transmit and receive traffic over an ATM network.

The preferred tools for configuring, monitoring, and controlling service modules are the CiscoView and Cisco WAN Manager applications for equipment management and connection management, respectively. However, the command-line interface (CLI) also provides access to the service modules and is highly applicable during initial installation, troubleshooting, and any situation in which low-level control is useful.

MPSM Card Common Features

The following sections describe the features of the MPSM card:

•"MPSM-8T1E1 Card Common Features"

•"MPSM-8T1-ATM Card Features"

•"MPSM-8E1-ATM Card Features"

•"MPSM-8T1E1 Card Differences"

MPSM-8T1E1 Card Common Features

Designed as a replacement for the existing cell bus service modules (AUSM-8T1/B, AUSM-8E1/B, CESM-8T1/B,CESM-8T1, CESM-8E1, FRSM-8T1, FRSM-8T1-C, FRSM-8E1, and FRSM-8E1-C), the MPSM-8T1E1 card is an ASAC service module that supports multiple interface types (T1 and E1) and multiple service types (ATM, Frame Relay, and Circuit Emulation).

The MPSM-8T1E1 card can be used with or without services provisioned on the card. Without services provisioned on the card, the MPSM-8T1E1 is used in a redundancy group and retains its physical card type name of MPSM-8T1E1.

When provisioned for a specific interface and service type, the MPSM-8T1E1 card takes on a logical card type name depending upon what interface and service type has been configured. For example, when an MPSM-8T1E1 in standby state is provisioned using the PXM cnfcdmode command for ATM services using a T1 interface, the card changes its name to the logical card type name of MPSM-8T1-ATM.

Features common to the MPSM-8T1E1 regardless of the interface and service type configured include:

•Single firmware image for all services and platforms

•Service type and interface type configured is for the entire card

•Run-time firmware is stored on the flash memory improving the card bring up time

•Command Line Interface (CLI) is consistent with the existing CLI on the eight port Cell Bus Service Modules (AUSM, CESM, and FRSM)

•Optional software features (channelization, IMA, and rate control) enabled through feature licenses

•Support for connection provisioning using VSI proxy and Portable Auto Route (PAR) enabling use in the PXM1E and PXM1 based systems

•Support for all the existing eight port Cell Bus Service Module (CBSM) back cards

•Graceful upgrade from the existing CBSMs to the MPSM

•Onboard NxDS0, T1/E1 Bit Error Rate Test (BERT) including V54/PN127 extended loopback pattern generation and verification

•Online diagnostics

•Each line can support a single Nx64K ATM port, or full T1E1 ATM port.

•Support from SRM and SRME for T1/E1 bulk distribution, 1:N redundancy, loopbacks, and BERT. Redundancy features include:

–1:N redundancy between existing CBSMs and MPSM with CBSM as primary and MPSM as secondary

–1:N redundancy between multiple services (ATM, Frame Relay, Circuit Emulation). For example, there can be an AUSM-8T1/B and FRSM-8T1 in a single redundancy group with the MPSM-8T1E1 acting as secondary

–1:N redundancy between MPSMs

MPSM-8T1-ATM Card Features

When the MPSM-8T1E1 card is configured to support a T1 interface type and ATM services, the card becomes an MPSM-8T1-ATM card, supporting the features common to all the AUSM-8T1/B cards and the specific features of the AUSM-8T1 card.

The MPSM-8T1-ATM provides eight T1 interfaces for full-duplex communications at up to 1.544 Mbps per interface, adding up to a total card throughput of 12.352 Mbps. The physical connector for each line is an RJ48 connector.

The MPSM-8T1-ATM supports unchannelized T1 port selection on a per-T1 basis.

MPSM-8E1-ATM Card Features

When the MPSM-8T1E1 card is configured to support an E1 interface type and ATM services, the card becomes an MPSM-8E1-ATM card, supporting the features common to all the AUSM-8E1/B cards and the specific features of the AUSM-8E1 card.

The MPSM-8E1-ATM provides eight E1 interfaces for full-duplex communications at up to 2.048 Mbps per interface, adding up to a total card throughput of 14 Mbps. The physical connector for each card can be either RJ48 connectors or SMB connectors

MPSM-8T1E1 Card Differences

Differences between the MPSM-8T1E1 card and the AUSM-8T1/B and AUSM-8E1/B cards include:

•The MPSM-8T1E1 card supports Bit Error Rate Testing (BERT) through use of the Service Resource Module (SRM) and Onboard BERT functionality. The AUSM-8T1/B and AUSM-8E1/B cards support BERT only through use of the SRM.

•The MPSM-8T1E1 card supports Online Diagnostics for active and standby cards. The AUSM-8T1/B and AUSM-8E1/B cards do not support Online Diagnostics.

•The AUSM-8T1/B and AUSM-8E1/B cards support single bit HEC correction; the MPSM-8T1E1 card does not support single bit HEC correction.

•The AUSM-8T1/B and AUSM-8E1/B cards support PLPP local and remote loopback; the MPSM-8T1E1 card does not support PLPP local and remote loopback.

•The AUSM-8T1/B and AUSM-8E1/B cards support 5 egress queuing algorithms, and you can configure the MaxBwInc and MinBwInc parameters with the cnfportq command. The MPSM-8T1E1 card supports the default egress queuing algorithm 3 (FIFO) only, and the MaxBwInc and MinBwInc parameters are not configurable through the cnfportq command.

•On the MPSM-8T1E1 card, IMA cell latency is 2.5 ms. On the AUSM-8T1/B and AUSM-8E1/B cards, IMA cell latency is 1.5 ms.

•The MPSM-8T1E1 card supports IMA 1.1. The AUSM-8T1/B and AUSM-8E1/B cards only support IMA 1.0.

•On the MPSM-8T1E1 card, the following new options are configurable through the addimagrp and cnfimagrp commands: IMA version number and TX IMA ID. These options are not supported on the AUSM-8T1/B and AUSM-8E1/B cards.

•The dspimagrp command displays the IMA version number and TX IMA ID for the MPSM-8T1E1 card; this information is not displayed when you enter the dspimagrp command on an AUSM-8T1/B or AUSM-8E1/B card.

•The MPSM-8T1E1 card supports configurable IMA TxIDs and Rx IDs through the new cnfimaparms command; the AUSM-8T1/B and AUSM-8E1/B cards do not support configurable IMA TxIDs and Rx IDs or the cnfimaparms command.

•When the dspimainfo command is entered on the MPSM-8T1E1 card, the display reports that link that is unusable for one of the following reasons: "Fault", "Misconnected", "Blocked", or "Failed." When you enter the dspimainfo command on an AUSM-8T1/B or AUSM-8E1/B, the display only reports that a link is "Unusable."

•The MPSM-8T1E1 card supports configurable frame lengths in an IMA port. You can configure the Frame lengths to be 32, 64, 128, or 256). The AUSM-8T1/B and AUSM-8E1/B cards support a frame length of 128 only.

•The MPSM-8T1E1 card supports CTC and ITC clocking. The AUSM-8T1/B and AUSM-8E1/B cards support only CTC clocking.

•The MPSM-8T1E1 card supports NxDS0 ATM UNI ports and full T1E1 ATM UNI ports; the AUSM-8T1/B and AUSM-8E1/B only supports full T1/E1 ATM UNI ports.

•The MPSM-8T1E1 card supports the following new ATM statistics counters in the dspchancnt command display:

–chanIngrCLPSetDiscard— number of ingress CLP set cells that were discarded when the PCR was exceeded.

–chanIngrUPCSCRExceedDiscard—number of ingress CLP set cells that were discarded because of a second bucket violation.

–chanIngrUPCCLPHysterisisDiscard—number of ingress CLP set cells that were discarded when the CLP threshold was exceeded.

–chanEpdDiscCells—number of cells that were discarded due to EPD.

–chanPpdDiscCells—number of cells that were discarded due to PPD.

Eight Port AUSM and MPSM Card Features

Table 1-4 summarizes the key features of the AUSM-8T1/B, AUSM-8E1/B, MPSM-8T1-ATM, and MPSM-8E1-ATM cards:

Table 1-4 Eight Port AUSM and MPSM Card Features

Feature

AUSM-8T1/B, AUSM-8E1/B

MPSM-8T1-ATM, MPSM-8E1-ATM

Onboard BERT

No

Yes

BERT through SRM

Yes

Yes

IMA

Yes

Yes

Online Diagnostics

No

Yes

Card Redundancy

1:N

1:N

The following sections describe the features of the AUSM, MPSM-8T1-ATM, and MPSM-8T1-ATM cards:

•"AUSM and MPSM-8T1E1-ATM Common Card Features"

•"Inverse Multiplexing over ATM"

•"T1/E1 Clocking Mechanism"

AUSM and MPSM-8T1E1-ATM Common Card Features

The AUSM-8T1/B, AUSM-8E1/B, MPSM-8T1-ATM, and MPSM-8E1-ATM support the following features:

•Up to 8 T1 or E1 interfaces.

•ATM UNI with high port-density for the CPE—with AUSMs in all 24 service module slots, an MGX 8850 shelf can support up to 192 individual T1 or E1 lines. An individual card set can support 1000 data connections and 16 management connections.

•Inverse multiplexing for ATM (IMA) Each card can provide N x T1 or N x E1 logical ports up to maximum rates of 12 Mbps for T1 or 16 Mbps for E1.

Note The MPSM-8T1-ATM and MPSM-8E1-ATM support IMA version 1.1 and can interoperate with IMA version 1.0. The AUSM-8T1/B and AUSM-8E1/B support IMA version 1.0 only.

•Class of service—CBR, ABR, non-real-time VBR, real-time VBR, and UBR with per-VC queuing on ingress and multiple class of service queues on egress. ABR includes support of both ForeSight ABR and standard ABR (TM 4.0 compliant).

•Statistics collection.

•Virtual path connections (VPCs).

•SPVCs and PVCs.

•Network synchronization derived from one of its lines.

•Bit error rate test (Bert)

•Bit error rate test (BERT) functionality with loop back pattern generation and verification on individual lines or logical port. For a description of the BERT functions, see the Cisco MGX 8230, MGX 8250, and MGX 8850 (Release 1) Software Configuration Guide and Command Reference, Release 1.2.10.

•1:N redundancy through the optional MGX-SRM-3T3/C or SRM-E card.

•Automatic card-restore.

•SNMP and TFTP to support card and connection management.

•Resource partitions for individual network control applications.

•B8ZS or AMI line coding

•ANSI T1.408 extended superframe format line framing

•Each interface configurable as a single port

•Supports additional port and channel statistics.

The sections that follow provide additional information on the following common AUSM-8T1/B, AUSM-8E1/B, MPSM-8T1-ATM, and MPSM-8E1-ATM features:

•Inverse Multiplexing over ATM (IMA)

•T1/E1 Clocking Mechanism

Inverse Multiplexing over ATM

Inverse Multiplexing over ATM (IMA) is a protocol that runs on the AUSM-8T1/B, AUSM-8E1/B, MPSM-8T1-ATM, and MPSM-8E1-ATM. IMA allows you to combine multiple T1 or E1 interfaces into a single, high-speed IMA interface.

These combinations of multiple links are called IMA groups. IMA groups are comprised of IMA links.

The AUSM-8T1/B, AUSM-8E1/B, MPSM-8T1-ATM, and MPSM-8E1-ATM support a maximum of 8 IMA groups per card.

IMA is also supported on the following Cisco MGX 8850 and Cisco MGX 8830 cards:

•PXM1E-16-T1E1 (supports a maximum of 16 IMA groups in the bottom bay only)

•AXSM-32-T1E1-E (supports a maximum of 32 IMA groups; 16 groups in the top bay and 16 groups in the bottom bay. All the IMA links in an IMA group must be in the same bay.)

•MPSM-16-T1E1 and MPSM-T3E3-155

Note For information on PXM1E IMA, refer to the Cisco MGX 8800/8900 Series Configuration Guide, Release 5.2.

Note For information on AXSM-32-T1E1-E IMA, refer to the Cisco ATM Services (AXSM) Configuration Guide and Command Reference for MGX Switches, Release 5.2.

Note For information on MPSM-16-T1E1 and MPSM-T3E3-155, refer to the Cisco ATM and Frame Relay Services (MPSM-T3E3-155 and MPSM-16-T1E1) Configuration Guide and Command Reference for MGX Switches, Release 5.2

SCTs number 54 and 55 provide support for IMA groups. However they only support IMA groups with up to 4 lines. You must create your own SCTs for IMA groups with more than 4 lines.

The AUSM-8T1/B and AUSM-8E1/B support only IMA Version 1.0. The MPSM-8T1-ATM and MPSM-8E1-ATM support both IMA Versions 1.0 and 1.1.

T1/E1 Clocking Mechanism

The AUSM-8T1/B, AUSM-8E1/B, MPSM-8T1-ATM, and MPSM-8E1-ATM provides the choice of a physical interface Tx clock from one of the following sources, as illustrated in Figure 1-1:

1. Loop clocking derived from Rx Line Clock.

2. MGX local switch clock derived on the PXM (Synchronous).

Figure 1-1 T1/E1 Clocking Mechanisms

–

SRM Card Services

The following sections describe the services that the SRM card provides to the AUSM and MPSM cards:

•"Overview of the SRM Card"

•"SRM Card Features"

Overview of the SRM Card

The Cisco MGX switch supports both 1:1 and 1:N redundancy for service modules. The 1:N redundancy feature requires that a Service Resource Module (SRM) card be installed on the MGX switch. Three models of the SRM are supported on the Cisco MGX switches in this release, the SRM-3T3/C, the SRME, and the SRME/B.

The SRM manages bulk distribution with 1:N Redundancy, Non-Bulk Mode 1:N Redundancy, and BERT functions on T1 or E1 service module lines and ports. Cards that have the T1 or E1 access lines physically connected to their back cards are in non-bulk mode. Cards that receive T1 or E1 access lines from the SRM across the backplane of the switch are in bulk mode.

Line redundancy is available to service modules if they are configured for bulk distribution using the SRME and SRME/B card. By using the optical back card option, intercard APS line redundancy is available only if the SRM and PXM have been installed in redundant pairs.

For non-bulk mode cards 1:N redundancy uses the redundancy bus on the backplane to pass the user traffic from the back card of the failed primary card to the active secondary front card. In non-bulk mode, multiple 1:N redundancy groups can be defined but an active backup operation is permitted in only one of the groups in a given bay at any given time. In this mode, a back card is not required for the SRM.

For cards in bulk mode, the distribution bus is used to pass the user traffic to the secondary card. In bulk distribution mode, multiple 1:N redundancy groups can be defined. Because the distribution bus can handle multiple traffic flows, multiple secondary cards can be active at the same time. A back card is required for an SRM operating in bulkmode.

Consider the following when planning for AUSM or MPSM 1:N redundancy:

•Service module backcards are not required for bulk mode 1:N redundancy

•Service module backcards must be used for non-bulk mode 1:N redundancy.

•Standby modules in non-bulk mode 1:N redundancy must use the "R-" redundancy back card type (R-RJ48-8T1E1 or R-SMB-8E1).

•1:1 Y-cable redundancy is not supported on any of the 8 port CBSMs.

SRM Card Features

Support for each type of the SRM cards by the PXM1, PXM1E, and PXM45 processor cards is shown in Table 1-5.

Table 1-5 SRM Cards Supported by PXM1, PXM1E, and PXM45 Controllers

MGX 8230,

8250

MGX 8850

MGX 8830

MGX 8830/B

SRM Card

Back Card

PXM1

PXM1

PXM45

PXM45/B

PXM45/C

PXM1E

PXM1E

PXM45/C

SRM-3T3/C

BNC-3T3-M

Yes

Yes

No

Yes

Yes

Yes

Yes

No

SRME

SMFIR-1-155 STM1-EL-1

Yes

Yes

No

Yes

Yes

Yes

Yes

No

SRME/B

SMFIR-1-155 STM1-EL-1 BNC-3T3-M

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

The SRM-3T3/C provides redundancy services, BERT services, and T3 to T1 line distribution on the Cisco MGX 8230, Cisco MGX 8250, Cisco MGX 8850 (PXM1), Cisco MGX 8850 (PXM1E/PXM45), and Cisco MGX 8830 (PXM1E/PXM45) switches. The SRM-3T3/C uses the BNC-3T3-M back card. The SRM-3T3/C T1 line distribution feature has the following capabilities and limitations:

•Supports up to 80 T1 lines from three T3 lines on the Cisco MGX 8250, Cisco MGX 8850 (PXM1), and Cisco MGX 8850 (PXM1E/PXM45) per bay. Line distribution is supported in all 12 service module slots, except for on the Cisco MGX 8250 and Cisco MGX 8850 (PXM1), where slots 9, 10, 25, and 26 do not support line distribution.

•Supports up to 64 T1 lines from three T3 lines on the Cisco MGX 8230 and Cisco MGX 8830 (PXM1E/PXM45). Line distribution is supported in all 8 service module slots.

•A service module should have all T1 lines coming from the SRM-3T3/C or all T1 lines coming from the back card of the service module. If you link just one T1 channel on a service module to the SRM-3T3/C, the back card on the service module becomes inoperative.

•If bulk T1 line distribution is in use, service module back cards are not required.

The SRME provides redundancy services, BERT services, and OC-3/STM-1 to T1/E1 line distribution on the Cisco MGX 8230, Cisco MGX 8250, Cisco MGX 8850 (PXM1), Cisco MGX 8850 (PXM1E/PXM45), and Cisco MGX 8830 (PXM1E/PXM45) switches. The SRME uses the SMFIR-1-155 and STM1-EL-1 back cards. The SRME T1 and E1 line distribution feature has the following capabilities and limitations:

•Supports either 84 T1 lines or 63 E1 lines from one OC-3/STM-1 line on the Cisco MGX 8250, Cisco MGX 8850 (PXM1), and Cisco MGX 8850 (PXM1E/PXM45). Line distribution is supported in all 12 service module slots.

•Supports either 64 T1 lines or 63 E1 lines from one OC-3/STM-1 line on the Cisco MGX 8230 and the Cisco MGX 8830 (PXM1E/PXM45). Bulk distribution is supported in all 8 service module slots.

•In a given bay on the Cisco MGX 8850 (PXM1E/PXM45), the mixing of T1 and E1 line distribution is not supported. If you want to set up both T1 and E1 line distribution, you must install all T1 service modules in one bay and all E1 service modules in the other bay. On the Cisco MGX 8830 (PXM1E/PXM45), you must choose either T1 or E1 bulk distribution.

•VT1.5 extraction and distribution of T1 from the Sonet (OC-3/STS-3) interface (North America).

•VC11 extraction and distribution of T1 from the SDH (STM-1) interface (Japan).

•VC12 extraction and distribution of E1 from the SDH (STM-1) interface (Rest of the world).

•A service module should have all T1 or E1 lines coming from either the SRME, or from the back card of the service module. If you link just one T1 or E1 channel on a service module to the SRME, the back card on the service module becomes inoperative.

•If bulk distribution is in use, service module back cards are not required.

The SRME/B provides redundancy services, BERT services, OC-3/STM-1 to T1/E1 line distribution, and T3 to T1 line distribution on the Cisco MGX 8230, Cisco MGX 8250, Cisco MGX 8850 (PXM1), Cisco MGX 8850 (PXM1E/PXM45), and Cisco MGX 8830 (PXM1E/PXM45) switches. The SRME/B uses the SMFIR-1-155, STM1-EL-1, and BNC-3T3-M back cards. The SRME/B T1 and E1 line distribution feature has the combined capabilities and limitations of the SRM-3T3/C and SRME cards.

Card redundancy, bulk distribution, and BERT support for AUSM and MPSM cards is summarized in Table 1-6. When consulting this table, remember that the SRME supports bulk distribution of both T1 and E1 lines, whereas the SRM-3T3/C supports bulk distribution of only T1 lines.

Table 1-6 Card Redundancy, Bulk Distribution, and BERT Services for AUSM and MPSM cards

Front Card

1:N Card Redundancy with SRM

1:1 Card Redundancy with Y-cable

Bulk Distribution Support

BERT Support

AUSM-8T1/B

Yes

No

Yes

Yes, with SRM

AUSM-8E1/B

Yes

No

Yes, with SRME and SRM-E/B only

Yes, with SRM

MPSM-8T1E1

Yes

No

Yes

Yes, with SRM and Onboard BERT

For more information on BERT, see Chapter 5, "Managing AUSM and MPSM Cards."

Note For instructions on how to set up and configure a Cisco MGX switch for card redundancy, line redundancy, line distribution, and SRM supported BERT, refer to the Cisco MGX 8800/8900 Series Configuration Guide, Release 5.2 and the Cisco MGX 8850 Edge Concentrator Installation and Configuration, Release 1.1.3 documentation.