Cisco BPX 8600 Series, Руководство по установке и настройке

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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 3 BPX Switch Common Core Components
BPX Switch StrataBus 9.6 and 19.2 Gbps Backplanes
BPX Switch StrataBus 9.6 and 19.2 Gbps Backplanes
The BPX switch may be equipped with a backplane that supports either a 9.6 or up to 19.2 Gbps
operation. The 19.2 Gbps backplane can physically be identified by the card slot fuses on the bottom
rear of the backplane. All BPX switch modules are interconnected by the BPX switch StrataBus
backplane physically located between the front card slots and the back card slots.
Although the ATM data paths between the switching fabric and the interface modules are individual
data connections, there are also a number of system bus paths for controlling the operation of the BPX
switch. The StrataBus backplane, in addition to the 15 card connectors, contains these signal paths:
• ATM crosspoint wiring
Individual paths to carry ATM trunk data between both the network interface and service interface
modules and the crosspoint switching fabric.
• Polling bus
To carry enable signals between the BCC and all network interface modules.
•
Communications bus
For internal communications between the BCC and all other cards in the node.
• Clock bus
To carry timing signals between the BCC and all other system cards.
• Control bus
Enables either the A-bus wiring or B-bus wiring.
All StrataBus wiring is completely duplicated and the two sets of bus wiring operate independently to
provide complete redundancy. Either the A-side wiring or B-side wiring is enabled at any particular
time by signals on the Control bus.