Released
PMC-Sierra, Inc.
PM9311/2/3/5 ETT1™ CHIP SET
Data Sheet
PMC-2000164
ISSUE 3
ENHANCED TT1™ SWITCH FABRIC
6. Bring up new board. See “Port Board being added:” on page 87.
7. Enable TDM traffic in Scheduler for this port. TDM Traffic can now flow to/from this new port board.
8. Refresh state information from this new port to Schedulers. (See Section 1.9.4 “Scheduler Refresh
Procedure”) This is only necessary if the linecard sends traffic before the link to the Scheduler
board comes up. Re-establish primary and secondary Schedulers in every port.
9. Best-effort traffic can now flow to/from this new port board.
1.9.6.2 Crossbar Board
The steps needed to replace a failed Crossbar board on a non-redundant Crossbar configuration and a
redundant Crossbar configuration are different.
For a non-redundant Crossbar configuration, a failed Crossbar board causes all traffic in the entire system
to be disabled. These are the following steps required after detection of a failed Crossbar board.
1. Detect failed Crossbar board. For example, CPU is indicated of loss of connectivity from this board
to any one of the existing port boards.
2. Immediately disable TDM and non-TDM traffic for all ports in the Schedulers.
3. Disable the AIB links to/from the Port board.
4. Replace failed Crossbar board.
5. Bring up new board (see “Crossbar Board being added:” on page 90)
6. Enable TDM and best-effort traffic for all ports in the Scheduler.
7. Traffic can now flow.
The steps needed to cope with a failed Crossbar board on a redundant Crossbar configuration are
described here. A failed Crossbar board does not require traffic to be disabled. The redundant Crossbar
board carries traffic while the failed Crossbar board is replaced. These are the necessary steps to follow.
1. Detect failed Crossbar board. For example, CPU is indicated of loss of connectivity from this board
to any one of the existing port boards.
2. Disable the AIB links to/from the Port board.
3. Replace failed Crossbar board.
4. Bring up new board (see “Crossbar Board being added:” on page 90)
5. Crossbars are now in fault tolerant mode.
100
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
PMC [ PMC-SIERRA, INC ]
