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5-5
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.10, Part Number 78-11603-01 Rev. D0, July 2001
Chapter 5 BXM Card Sets: T3/E3, 155, and 622
BXM Capabilities
• 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.
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
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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.
Service Types
The BXM cards support the full range of ATM service types per ATM Forum TM 4.0.
Cbr Service:
• Usage Parameter Control (UPC) and Admission Control
• UPC: Ingress rate monitoring and discarding per I.371 for: