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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 5 BXM Card Sets: T3/E3, 155, and 622
BXM Functional Description
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Performs explicit rate (ER) and EFCI tagging if enabled.
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Supports Foresight congestion control and manages the designated service classes on a per VC
basis with OAM processing.
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Supports OAM flows for internal loopback diagnostic self-tests and performance monitoring.
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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 (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:
•
ATM cell header translation.
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Directs ATM cells to the Egress Queue Engine with a 2 x OC-12c throughput capacity.
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Implements the multicast function in the egress direction, providing up to 4000 multicast
connections.
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Translates standard OAM flows and Foresight cells.
•
Optimizes backplane bandwidth by means of a polling mechanism.
ACP Subsystem Processor
The ACP performs these localized functions:
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Initializes BXM at power up
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Manages local connection databases
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Collects card, port, and connection statistics
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Manages OAM operation
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Controls alarm indicators (active, standby, fail)
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.
Содержание BPX 8600 Series
Страница 43: ...P A R T 1 The BPX Switch ...
Страница 44: ......
Страница 151: ...P A R T 2 Installation ...
Страница 152: ......
Страница 261: ...P A R T 3 Initial Configuration and Network Management ...
Страница 262: ......
Страница 291: ...P A R T 4 Configuring Connections ...
Страница 292: ......
Страница 481: ...P A R T 5 Troubleshooting and Maintenance ...
Страница 482: ......
Страница 531: ...P A R T 6 BPX Specifications ...
Страница 532: ......
Страница 563: ...P A R T 7 Appendices ...
Страница 564: ......
Страница 624: ...Glossary 24 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...
Страница 630: ...Index 6 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...