Cisco Cisco Packet Data Interworking Function (PDIF)
Interchassis Session Recovery
▀ Updating the Operating System
▄ ASR 5000 System Administration Guide, StarOS Release 18
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Initiating an SRP Switchover
An SRP switchover places the primary chassis in active mode and makes the backup chassis active. The primary chassis
is now processing sessions with the upgraded software.
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 and it begins servicing new session requests. Allow the switchover process to complete.
chassis and it begins servicing new session requests. Allow the switchover process to complete.
Step 2
On the backup chassis, run the show srp info command. Chassis State should indicate Standby when switchover is
complete.
complete.
Step 3
On the primary chassis, confirm the switchover is complete by running the show srp info command. Chassis State
should indicate Active when switchover is complete.
should indicate Active when switchover is complete.
Checking AAA Monitor Status
If your network deployment requires communication with AAA servers, check the status of communication with AAA
servers as described in
servers as described in
Making Test Calls
Once the chassis state is verified and subscribers are migrated, perform new call testing to make sure calls are
successful.
successful.
Fallback Procedure
To revert to the previous configuration and software build, perform the following steps as a user with administrative
privileges.
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.
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
[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