L2 failover on WAN?

[cyruspy]

Hello!,

I've setup CARP in the past with 3 static public IPs without problem. In this case, I need two firewall in HA but using a single DHCP assigned IP on the WAN side.

Would it be possible to have something similar to the floating IP but for L2?, something like defining a MAC address and having it move to the active node?. On the ISP side I have a HFC CM, with DHCP por public IP assigment and migrating to 3 static public IPs is not possible in this case.