A: The 2504 supports N+1 redundancy but not SSO (Stateful Switchover) High Availability.
Click in the upper-right corner to initiate the process. cisco wlc 2504 firmware download work
For administrators preferring the command line interface, use the following procedure: A: The 2504 supports N+1 redundancy but not
Upgrading a controller managing a large number of APs can take up to 30 minutes depending on your network size. APs must remain powered throughout the process to complete their firmware updates successfully. cisco wlc 2504 firmware download work