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Waiting for Session Synchronization, on page 295
Initiating an SRP Switchover
This SRP switchover places the primary system in active mode and returns the backup system to the standby.
The primary chassis is now processing sessions with the upgraded software.
Step 1
On the backup chassis run the srp initiate-switchover command. All existing sessions will be migrated to the primary
chassis which begins servicing new session requests. Allow the switchover process to complete.
Step 2
On the backup system, run the show srp info command. Chassis State should indicate Standby when switchover is
complete.
Step 3
On the primary system, confirm the switchover is complete by running the show srp info command. Chassis State should
indicate Active when switchover is complete.
Making Test Calls
Once the chassis state is verified and subscribers are migrated, perform new call testing to make sure calls
are successful.
Fallback Procedure
To revert to the previous configuration and software build, perform the following steps as a user with
administrative privileges.
Step 1
Run the Exec mode show boot command. The topmost lowest numbered entry of the displayed output should be the
new configuration with the new software build. The second topmost entry should be the backup configuration.
Step 2
Remove the topmost boot entry n, and synchronize the configuration across the management cards.
[local]host_name# config
[local]host_name(config)# no boot system priority n
[local]host_name(config)# end
[local]host_name# filesystem synchronize all
Step 3
Reboot the system to load its previous configuration.
[local]host_name# reload
Step 4
Perform health checks as described in Performing Health Checks, on page 293
ASR 5500 System Administration Guide, StarOS Release 21.5
297
Interchassis Session Recovery
Fallback Procedure
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