Cisco ASA failover

Primary Firewall ---------------- failover
failover lan unit primary
failover lan interface failover Management0/0
 failover link failover Management0/0
failover interface ip failover 192.168.254.1 255.255.255.0 standby 192.168.254.2

Secondary Firewall ------------------ config t
no failover failover lan unit secondary
failover lan interface failover Management0/0 failover link failover Management0/0
 failover interface ip failover 192.168.254.1 255.255.255.0 standby 192.168.254.2 failover ------
sh failover
sh run failover
sh failover interface