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6-6 Cisco BPX 8600 Series Reference
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.
AT M Lay er
• 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.