Atm Layer; Service Types - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 5 BXM Card Sets: T3/E3, 155, and 622
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ATM Layer

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Service Types

The BXM cards support the full range of ATM service types per ATM Forum TM 4.0.
CBR Service:
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Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
For MFJ firmware and above, channel statistics level 0 is no longer supported for BXM-155-4,
BXM-155-8, BXM-622, BXM-622-2, BXM-T3-12, BXM-T3-8, BXM-E3-8, and BXM-E3-12
models. However, it is still supported for all the other models (BXM-155-8DX, BXM-155-8D,
BXM-155-4DX, BXM-155-4D, BXM-622-2DX, BXM-622-2D, BXM-622-DX, BXM-T3-12EX,
BXM-T3-12E, BXM-T3-8E, BXM-E3-12EX, BXM-E3-12E, and BXM-E3-8E).
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.
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
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Maximum queue depth
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– Frame discard enable
– Cell Loss Priority (CLP) High and Low thresholds
Service priority level
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– 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)
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– ABR with Explicit Rate (ER) stamping/EFCI tagging
– ABR with ForeSight
Self-test and diagnostic facility.
Usage Parameter Control (UPC) and Admission Control
UPC: Ingress rate monitoring and discarding per I.371 for:
Cisco BPX 8600 Series Installation and Configuration
BXM Capabilities
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