WLCs manage a large number of APs, which in turn may have a large number of WLAN clients associated with them. WLCs thus play a crucial role in the functioning of the entire WLAN infrastructure—for which reason the organization of a backup solution in case of temporary WLC failure is in many cases indispensable.
In case of a backup event, a managed AP should connect to an alternative WLC. Because this connection will only function if the certificate in the AP has been authorized by the backup controller, it is essential that all WLCs sharing a backup solution have identical root certificates.
