Upgrading an NPlus1 Site

To upgrade a site running NPlus1, all controllers must be on the same FortiWLC-SD version and the backup controller must be in the same subnet as the primary controllers.

You can choose any of the following options to upgrade:

Option 1 - Just like you would upgrade any controller, you can upgrade an NPlus1 controller.

1. Upgrade master and then upgrade slave.
2. After the upgrade, run the nplus1 enable command to enable master on slave controller.

Option 2 - Upgrade slave and then upgrade master controller.

After the upgrade, run the nplus1 enable command to enable master service on the slave controller.

Option 3 - If there are multiple master controllers

1. Upgrade all master controllers followed by slave controllers. After the upgrade, run the nplus1 enable command to enable all master controllers on slave controllers .
2. Run the the nplus1 enable command to enable master controller on slave controller.
3. Connect to all controllers using SSH or a serial cable.
4. Runthe show nplus1 command to verify if the slave and master controllers are in the cluster.
   The output should display the following information:
   Admin: Enable
Switch: Yes
Reason: ‐
SW Version: 8.3-1
5. If the configuration does not display the above settings, run the nplus1 enable <master‐controller‐ip> command to complete the configuration.
6. Run the nplus1 add master command to add any missing master controller to the cluster.