Environment : This article applies to all the IAP running a minimum version of 126.96.36.199-3.1.x.x. Any version prior to this does not have this feature.
This article explains how the IAPs switch between the primary and backup AMP server in case of non-availability of the primary and the backup servers.
An IAP takes around 5 minutes to switch over from the primary Airwave server to the backup server in case the primary server is unreachable. It takes 2 duty cycles (minutes) to Judging the down status of the primary AMP server and another 3 duty cycles (minutes) to connect, identify and log into the backup AMP server.
When using the backup AMP, IAP will continue to attempt a connection to the primary AMP every duty cycle (1 minute). If the attempt becomes successful, IAP will log out of the backup AMP and log into the primary AMP.