Device failover detection time (peer timeout) (4 seconds)

When the primary device stops sending Heartbeat packets, it is declared dead at the end of four seconds (250 milliseconds x 16 timeouts).
Note The peer is considered active if a Heartbeat is received within 14 timeouts.

A failover is triggered seven seconds after the cluster has come up (3-second link uptime + 4-second device failover detection time). You can’t change the failover threshold.