I work in a small ISP environment, and we are using two Cisco 7200 VXR routers, one as a core router, and the other one as a PPPoE login server.
Both of these are under-utilised at the moment, and we would like to change them so our setup is redundant.
I have done some research and it seems like Virtual Router Redundancy Protocol (VRRP) is the best option, but as far as I can see, it needs to be configured on every interface on both routers, including VLAN sub-interfaces.
As an example, say I merge the config of the two routers so that both functions are handled by one router, then have the config of the second router an exact copy of the main one. Then I would configure VRRP on every interface/subinterface on both routers, as it appears that VRRP works on a per-interface basis.
I was just interested to know if there is a way of creating a sub-interface using maybe a /30 mask for the routers to communicate VRRP changes between themselves, instead of having to configure each interface on the backup router with an IP in the same network as the interface on the main router.
I hope I have explained myself clearly, but if not please do not hesitate to ask for clarification.
Thanks in advance,