Hello Mahesh,
The stateful failover link is used to replicate all the connections that are going through the active ASA.
The failover link is used to replicate the configuration and the following info:
*The unit state (active or standby).
•
Power status (cable-based failover only—available only on the PIX 500 series security appliance).
•Hello messages (keep-alives).
•Network link status.
•MAC address exchange.
That is why we recommend to use a dedicated interface different than the managment ( because of the capacity of this one)
Regards,
Julio
Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC
