I am new to VRF Lite but have recently implemented multiple VRFs on a single CPE (Customer Premises Equipment) router.
I have also implemented a two-CPE redundancy using Cisco HSRP protocol but with a single VRF.
Now, I would like to expand my design by using HSRP with multiple VRFs. The problem here isn't the VRF implementation, but how to implement HSRP with multiple VRFs. The scope of this query is on the Customer Premises Equipment (CPE).
Just playing devil advocate, but if the scenario is to use the same LAN subnet for for multiple VRFs, will it be technically possible to use the same HSRP VIP for the various HSRP groups under different VRFs?
As a given IP subnet can (locally) only belong to exactly one VRF (or the global context), those subnets have to be distinguished somehow on common links, e.g. by VLAN-tags on trunk links. The (non-default VLAN) HSRP messages then are tagged too, so their membership is clear, even if you use the same IP addresses multiple times (in different VRFs).