Re-Adding a secondary WLC to an existing active primary WLC

[fuhrersk8]

Hello Forum Team;

   I had to break  an HA pair (version 7.6.130.0) in order to upgrade (due to mismatch in Build-type) and now need to pair back the HA pair. SSO is enabled again on both WLC's, one primary and the other secondary. The secondary WLC is connected, but powered off. I will proceed to power on the secondary box:

Does this will cause the primary unit to reboot or the secondary will just come up as secondary-hot standby?

Thanks in advanced for your support guys! 

[mohanak]

After you enable HA, the primary and secondary controllers are rebooted. During the boot process, the role of the primary controller is negotiated as active and the role of the secondary controller as standby-hot. After a switchover, the secondary controller becomes the active controller and the primary controller becomes the standby-hot controller. After subsequent switchovers, the roles are interchanged between the primary and the secondary controllers. The reason for switchovers are either because of manual trigger or a controller or network failure.

The following are some guidelines for high availability:

•  We recommend that you do not pair two controllers of different hardware models. If they are paired, then a higher controller model becomes the active controller and the other controller goes into maintenance mode.
•  We recommend that you do not pair two controllers on different controller software releases. If they are paired, then the controller with the lower redundancy management address becomes the active controller and the other controller goes into maintenance mode.
•  All download file types, such as Image, Config, Web-Authentication bundle, and Signature files, are downloaded on the active controller first and then pushed to the standby-hot controller.
•  Certificates should be downloaded separately on each controller before they are paired.

[fuhrersk8]

Hello and thanks for your reply;

That is what documentation says but it is not my actual scenario.

Thanks again for your support.

Regards,