Build Upgrade
Backup Configuration
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Back up the current configuration—Save the current configuration that is used in case of downgrade/upgrade, which probably has all the features and configuration present until now.
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Collect the show support details on both Active and Standby chassis before making any changes or upgrade.
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Perform Health Checks.
Upgrade Procedure
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Perform chassis Health Checks on both the nodes.
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On the secondary chassis (ICSR), which is in Standby state, change boot priority with N+1 build.
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Reload to the latest build version.
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Do the new configuration change on Standby chassis (For example, any new CLI, license, or configuration changes).
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Perform Health Check on the reloaded chassis. Check for any crashes or errors.
Perform Switchover
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Before SRP switchover from Active to Standby on both chassis, check:
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On Active chassis: show subscriber summary | grep Total
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On Standby chassis: show srp checkpoint statistics | grep allocated
NoteThe count must be same for both chassis. -
On Active and Standby chassis: show sx peer
For example:
||||| Sx Service No of ||||| ID Restart ||||| | Recovery | Current Max Peer vvvvv v Group Name Node ID Peer ID Timestamp v Sessions Sessions State ----- ---- ----------------- ------------------------- ------------------- ------ --------- --------- -------- CAAXD 22 CPGROUP21 209.165.200.225 50331649 2021-03-17:02:33:55 0 0 0 NONE Total Peers: 1
NotePeer state must be Active and associated. Peer ID must match on both the chassis. -
On Standby chassis: show srp checkpoint statistics | grep Sessmgrs
Note"Number of Sessmgrs" must be equal to the "Sessmgrs in Standby-Connected state". -
On Active chassis:
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srp validate-configuration : This CLI command initiates a configuration validation check in the Active chassis. If the validation doesn't have any error, the output of this CLI command is blank.
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srp validate-switchover : Validates if both Active and Standby chassis are ready for a planned SRP switchover. If the chassis is ready for switchover, then the output of this CLI command is blank.
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show srp info | grep "Last Validate Switchover Status" : Output of this CLI command must be as follows.
Last Validate Switchover Status: Remote Chassis - Ready for Switchover
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show srp info debug : Active and Standby chassis must have the same output.
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On Active chassis: srp initiate-switchover
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Perform chassis Health Checks on both the nodes. Also check Step 1a and Step 1c under the Perform Switchover section. There can be a difference of 5%.
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Perform call testing since new sessions are serviced on the new Active chassis.
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Upgrade the old Active as mentioned in Step 2 through Step 5 under the Upgrade Procedure section.
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