Ingress And Egress Queue Engines; Simba; Acp Subsystem Processor - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

BXM Functional Description
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Ingress and Egress Queue Engines

The overall function of the queue engines is to manage the bandwidth of trunks or ports (UNI) via
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

This serial interface and multicast buffer ASIC provides:
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ACP Subsystem Processor

The ACP performs these localized functions:
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All basic configuration data on the card is copied to the battery backup memory (BRAM) on the card
so that in the event of a power outage, the card will retain its main configuration.
Cisco BPX 8600 Series Installation and Configuration
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Performs explicit rate (ER) and EFCI tagging if enabled.
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.
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.
Initializes BXM at power up
Manages local connection databases
Collects card, port, and connection statistics
Manages OAM operation
Controls alarm indicators (active, standby, fail)
Chapter 5 BXM Card Sets: T3/E3, 155, and 622
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001