Virtual Interfaces; Enhanced Bxm - Cisco BPX 8620 Installation And Configuration Manual

Chapter 5 BXM Card Sets: T3/E3, 155, and 622
•
UBR Service
•
•

Virtual Interfaces

•
•

Enhanced BXM

The Enhanced BXM (BXM-E) cards improve the current BXM cards by delivering even more
cost-effective ATM switching and traffic management. The Enhanced BXM cards come in D, E, DX and
EX versions, both including the following key feature enhancements:
•
•
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
VCQ configurable parameters
–
– CLP Hi and Lo thresholds
Maximum queue depth
Reserved queue depth
Congestion threshold
ABR congestion control
Based on Explicit rate stamping/EFCI cell tagging and ingress rate monitoring per ITU-T I.371
ABR with Virtual Source/Virtual Destination (VS/VD)
–
– ABR with Explicit Rate (ER) stamping/EFCI tagging
ABR with ForeSight
–
B
ased on UPC and admission control including EPD
Based on Explicit Rate Marking/EFCI cell tagging and ingress rate monitoring per ITU-T I.371
Support for up to 32 virtual interfaces per card, each with 16 CoS queues
Virtual Interface parameters
– Physical interface (trunk or port)
Peak Service Rate (PSR)
–
Minimum Service Rate (MSR)
–
– Maximum resource allocation
Support a greater cell storage capacity and VC configuration memory
The cell memory is increased on the Enhanced BXM cards to support even greater cell buffering
–
to maximize bandwidth efficiency and cell/frame throughput in wide area networks.
The ACP processor memory is quadrupled
–
ACP Processor memory is 64 MB and the flash memory is doubled to 4 MB on all Enhanced
BXM cards to allow more headroom for feature addition and enhancement in the future.
Support a greater number of connections
With a more powerful processor and more VC configuration memory in ATM cell switching
subsystem, the EX and DX versions of Enhanced BXM cards meet the increasing demand for greater
number of connections per interface. BXM-E cards support a greater number of connections per
interface, which cost effectively translates into supporting a greater user density.
Cisco BPX 8600 Series Installation and Configuration
BXM Capabilities
5-7