BXM Capabilities

ATM cell structure and format per ATM Forum UNI v3.1.

Loopback support.

1:1 card redundancy using Y-cable configuration.

A BXM card may be configured for either network or port (access) operation.

ATM Layer

UNI port option conforming to ATM Forum UNI v3.1 specification.

ATM cell structure and format supported per ATM UNI v3.1 and ITU I.361.

Header Error Correction (HEC) field calculation and processing supported per ITU I.432.

Usage Parameter Control using single and dual leaky bucket algorithm, as applicable, to control admission to the network per ATM Forum 4.0 Traffic Management.

Provides up to 16 CoS’s with the following configurable parameters:

Minimum service rate.

Maximum queue depth.

Frame discard enable.

Cell Loss Priority (CLP) High and Low thresholds.

Service priority level.

Explicit Forward Congestion Indication (EFCI) threshold.

Per VC Queuing.

Support for UBR CoS with Early Packet Discard.

Failure alarm monitoring per T1.64b.

ATM layer OAM functionality.

Congestion control mechanisms:

ABR with Virtual Source Virtual Destination (VSVD).

ABR with Explicit Rate (ER) stamping/EFCI tagging.

ABR with ForeSight.

Self-test and diagnostic facility.

6-6Cisco BPX 8600 Series Reference

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Cisco Systems 8600 Series manual ATM Layer, BXM Capabilities