Cisco BPX 8650, Installation And Configuration Manual

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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
Chapter 5 BXM Card Sets: T3/E3, 155, and 622
BXM Functional Description
•
Supports ForeSight congestion control and manages the designated service classes on a per VC basis
with OAM processing.
• Supports OAM flows for internal loopback diagnostic self-tests and performance monitoring.
•
Provides service queue decisions to the Ingress and Egress Queue Engines for per VC queues for
ABR VCs.
Ingress and Egress Queue Engines
The overall function of the queue engines is to manage the bandwidth of trunks or ports through
management of the ingress and egress queues.
In addition to the ABR VS queues, the ingress queues include 15 slot servers, one for each of 14 possible
BPX destination slots, plus 1 for multicast operation. Each of the 15 slot servers contains 16 Qbins,
supporting 16 classes of service per slot server.
In addition to the ABR VS queues, the egress queues include 32 Virtual Interfaces (VIs). Each of the 32
VIs supports 16 Qbins.
SIMBA
The following are the components that are provided for the Serial Interface and Multicast Buffer ASIC
(SIMBA):
•
ATM cell header translation.
• Directs ATM cells to the Egress Queue Engine with a 2 x OC-12c throughput capacity.
•
Implements the multicast function in the egress direction, providing up to 4000 multicast
connections.
• Translates standard OAM flows and ForeSight cells.
•
Optimizes backplane bandwidth by means of a polling mechanism.
ACP Subsystem Processor
The following are the ACP Subsystem processor localized functions:
• Initializes BXM at power up
•
Manages local connection databases
• Collects card, port, and connection statistics
•
Manages OAM operation
•
Controls alarm indicators (active, standby, fail)