Build Upgrade

Backup Configuration

  1. 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.

  2. Collect the show support details on both Active and Standby chassis before making any changes or upgrade.

  3. Perform Health Checks.

Upgrade Procedure

  1. Perform chassis Health Checks on both the nodes.

  2. On the secondary chassis (ICSR), which is in Standby state, change boot priority with N+1 build.

  3. Reload to the latest build version.

  4. Do the new configuration change on Standby chassis (For example, any new CLI, license, or configuration changes).

  5. Perform Health Check on the reloaded chassis. Check for any crashes or errors.

Perform Switchover

  1. Before SRP switchover from Active to Standby on both chassis, check:

    1. On Active chassis: show subscriber summary | grep Total

    2. On Standby chassis: show srp checkpoint statistics | grep allocated

      Note
      The count must be same for both chassis.
    3. 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
      
      Note
      Peer state must be Active and associated. Peer ID must match on both the chassis.
    4. On Standby chassis: show srp checkpoint statistics | grep Sessmgrs

      Note
      "Number of Sessmgrs" must be equal to the "Sessmgrs in Standby-Connected state".
    5. On Active chassis:

      1. 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.

      2. 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.

      3. 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
      4. show srp info debug : Active and Standby chassis must have the same output.

  2. On Active chassis: srp initiate-switchover

    1. 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%.

    2. Perform call testing since new sessions are serviced on the new Active chassis.

    3. Upgrade the old Active as mentioned in Step 2 through Step 5 under the Upgrade Procedure section.