Ssp Redundancy; Manually Initiating Ssp Failover - Nortel Versalar 15000 Troubleshooting Manual

Note that while Nortel Networks is developing mechanisms to eliminate any
service disruption during an SSP failover, Carrier Networking Services software
will effectively reset the entire system during a failover. Thus, the effects are
similar to a system reset.

SSP Redundancy

The Versalar 15000 can contain two SSPs, a primary SSP and a secondary SSP. If
the primary SSP fails, control fails over to the secondary SSP. When this occurs, it
appears like a reset; all activity that was present on the primary SSP terminates.
The failover SSP then begins with new activity.
Only the primary SSP card participates in routing and control of the Versalar
15000. If only one SSP has a flash card, the SSP with the image flash becomes the
primary SSP. The secondary SSP monitors the primary SSP; if the primary SSP
fails, control fails over to the secondary SSP.

Manually Initiating SSP Failover

You can use manual failover if you believe that the primary SSP is not functioning
properly and has not automatically failed over. You can also use a manual failover
if you have replaced a failed SSP and you want to switch control to the new SSP;
this might also be known as failback. You can manually initiate SSP failover by
issuing either the
aware, however, that both of these commands affect any processes running on the
SSP being failed over.
Note: It can take up to 10 minutes to complete the diags command, whereas a
reset
diagnostics and therefore does not verify the integrity of the hardware.
302768-C Rev 00
command or the
reset
command takes less than 2 minutes. The
command to the failed slot. Be
diags
command does not run
reset
Fault Management
7-3