The ac protect enable command enables dual-link backup globally and disables N+1 backup.
The undo ac protect enable command disables dual-link backup globally and enables N+1 backup.
By default, dual-link backup is disabled globally, and N+1 backup is enabled.
Usage Scenario
To ensure service stability, an AP needs to establish connections with two ACs. The two ACs work in active/standby mode. The active AC provides services for APs, whereas the standby AC is a backup to the active AC.
Follow-up Procedure
After dual-link backup or N+1 backup is enabled globally, configure the AC priority and standby AC IP address to implement dual-link backup or N+1 backup.
Precautions
Ensure that active and standby ACs deliver the same WLAN service configuration to an AP that connects to the two ACs.