Cisco BPX-BXM-T3-12, BXM-T3-12, BXM-E3-12, BXM-T3-8E, BXM-E3-8E Datasheet

DATA SHEET

BXM-T3/E3 Broadband Switch Module

THE BXM-T3/E3 IS A HIGH-DENSITY ATM T3/E3 INTERFACE CARD THAT USES CUSTOM

APPLICATION

THE INDUSTRY

S-PVC

CONNECTIVITY TAKES

HE ENHANCED MODELS OF THE BXM-T3/E3 ALSO DELIVER THE MOST ADVANCED ATM SWITCHING AND

T

TRAFFIC MANAGEMENT CAPABILITIES IN THE INDUSTRY

BXM-T3/E3 Broadband Switch Module

THE CONNECTION DENSITY AND CELL BUFFERS ON SELECTED MODELS AS WELL AS PROVIDE FUTURE SUPPORT

FOR VC MERGING FOR LARGE

-SPECIFIC INTEGRATED CIRCUIT (ASIC) TECHNOLOGY, FOR THE BPX 8600 SERIES, TO DELIVER
’S MOST ADVANCED AND RELIABLE ATM NETWORKING FEATURES.IT SUPPORTS PVCS, SVCS,

S AND MPLS LVCS (LABEL VC) AND PROVIDES CARD REDUNDANCY PROTECTION.ITS HIGH-SPEED

Key Features

• High-scalability connection densities with up to 144 T3/E3
ATM ports on a single Cisco BPX
wide-area switch

• Complete network control through dynamic resource sharing
and support for all ATM service classes

• Industry’s first fully compliant ATM Forum available bit rate
(ABR) virtual source/virtualdestination (VS/VD)capability in
custom ASICs

• New level of ATM price/performance to optimize the network
life cycle

• Support for VC merging with future software upgrade allows
“label” sharing for different MPLS VCs with the same
destination and class of service (enhanced -E and -EX
models only)

Withthe increasing deployment of Asynchronous TransferMode
(ATM) networks, there is a growing need for an ATM network
platform that can deliver an unprecedented level of scalability,
performance, and functionality at lower costs. Such an ATM
switching platform must support high-speed interfaces with high
port densities as well as advanced ATM traffic management
capability.

Advanced ATM traffic management capabilities are
implemented in a family of custom ASICs that enable
high-density, high-speed ATM interface modules with advanced
features and functionality for the BPX 8600 and IGX
series wide-area switches.

This ASIC technology cost-effectively delivers the most
advanced ATM switching and traffic management capability in
the industry. It represents the first commercially available
implementation of VS/VD.

ATM TO NEW LEVELS OF EFFICIENCY AND SCALABILITY.

.THESE MODELS EXTEND SCALABILITY BY DOUBLING

MPLS-BASED IP+ATM NETWORKS.

The BXM-T3/E3 broadband switch module is a 8-, or 12-

port, Digital Signal level 3 (DS-3) (45 or 34 Mbps) ATM interface

®

8600 series

™

8400

cardfor the BPX switch platform. The interfacecan be configured
for trunk, public, or private User-Network Interface (UNI)
applications on a per-port basis to provide a high-density,
low-cost broadband ATM networking solution.

Technical Specifications

Physical Layer

• 8-, or 12-port T3/E3 ports

• Complies with ATM Forum UNI Specification Version 3.1, 4.0

• 1:1 BXM redundancy supported using ‘Y’ redundancy

• Interface Physical Characteristics:

Characteristic T3 (DS3) E3 (34 Mbps)

Line Rate 44.736 Mbps 20 ppm 34.368 Mbps 20ppm

Line Code B3ZS HDB3

Cell transfer rate 96,000 cells/sec 80,000 cells/sec

Framing ANSI T1.107, T1.107a ITU-T G.804, G.832

Signal Level TA-TSY-00077 (PLCP) ITU-T G.703

Connector Locking SMB Locking SMB

Cell Mapping Direct Direct

Synchronization

• Can be configured for internal timing from the BPX internal
Stratum 3 clock conforming to ATT Pub. 62411

• System clock synchronization to service module port option

ATM Layer

• Configurable for trunk and public or private UNI application

• UNI conformant to ATM Forum UNI Specification V.3.1,
ITU-T I.361 and I.432 specifications

• Support for ATM Forum ILMI 4.0

• Complies with standard Usage Parameter Control (UPC) per
ATM Forum UNI Specification V.3.1, TM 4.0 and ITU-T I.371

• Supports virtual circuit connections (VCCs) and virtual path
connections (VPCs) per ATM Forum UNI Specification V.3.1
and ITU-T I.371

• Connections:
– 16,384 to 32,768 connections per card per UNI Specification

3.1

• Virtual path identifier (VPI)/virtual channel identifier (VCI)
range for VCCs and VPCs: per UNI Specification V.3.1

• Support for VC merging with future software upgrade
(enhanced -E and -EX models only)

Traffic Management

• Per-VC queuing and scheduling

• Per-VC traffic shaping

• Per-VC weighted fair queuing (WFQ)

• Up to 16 classes of service with the following configurable
parameters:

– Separate cell discard threshold for CLP0 and CLP1 cells
– Separate early packet discard (EPD) threshold for CLP0 and

CLP1 cells with future software upgrade (enhanced -E and

-EX models only)

– Maximum Queue Depth (MQD) with partial packet discard

(PPD)

– Service Priority Level (SPL)
– Explicit Forward Congestion Indication (EFCI) threshold

Constant Bit Rate Service

• UPC per ATM Forum UNI Specification V.3.1, TM V.4.0 and
ITU-T I.371

• UPC: Ingress rate monitoring and discarding for:

– Peak Cell Rate (PCR)
– Cell Delay Variation Tolerance (CDVT)

Variable Bit Rate Service

• UPC per ATM Forum UNI Specification V.3.1, TM V.4.0 and
ITU-T I.371

• UPC: Ingress rate monitoring and cell tagging for:

– PCR

– CDVT
– Sustainable Cell Rate (SCR)
– Maximum Burst Size (MBS)

• CLP tagging, enabled, or disabled on a per-virtual circuit (VC)
basis at the ingress side

• Support for both VBR-rt and VBR-nrt

• EPD

ABR Service and Congestion Control

• VS/VD per ATM Forum Traffic Management
Specification V.4.0

• Explicit Rate (ER) stamping

• EFCI tagging monitoring

• ForeSight

®

• Support for non-AAL5 traffic (enhanced -E and -EX models
only)

ABR VS/VD

• VS and VD resource management (RM) cell generation and
termination

• Virtual connection queue (VCQ) assigned to each VC ingress

• VCQ configurable parameters:

– Separate cell discard threshold for CLP0 and CLP1 cells
– EPD threshold
– Maximum queue depth with PPD
– Reserved buffer space for RM cells

• Support for UBR and VBR access

®

• Interworking with ForeSight

(enhanced -E and -EX models

only)

Unspecified Bit Rate Service

• UPC per ATM Forum UNI Specification V.3.1, TM V.4.0 and
ITU-T I.371

• Minimum cell rate configurable and guaranteed

• EPD

Virtual Trunks

• Support for up to 31 virtual trunks per card, each with 16
class-of-service queues

• UNIand NNI option for the interface with public ATM network

• Per virtual trunk traffic shaping

• Reconfigurable maximum trunk rate