HSRP Hello Packets Across Firewall
Posted on 2009-04-21
I understand that HSRP hello packets are not routable.
But, normally, when a redundant infrastructure is built esp in case of a primary and secondary data centre, firewalls usually sit behind the perimeter edge router. These routers are setup with HSRP to act as Active and Standy routers in the respective sites.
Offcourse, both sites will have a L2 connectivity to allow hello packets to travel between the sites.
But what i want to understand it is - with edge routers connected to firewalls and configured with HSRP, how Hello packets would be passed by firewall and then forwarded over distribution layer and finally over the L2 link to the secondary data centre site standby router.
Can some one clarify this, plz ?