Hi, I have multiple vrf's configured on a device and than a shared vrf. The shared VRF is used to form a ipv4 iBGP session between a redundant horizontal switch and an eBGP session with a downstream switch across a firewall. All the interfaces on this switch will be SVIs and they are in a VRF. I have a Loopback 0 interface configured however I haven't made that part of a VRF and its part of the Global RT. I have a Loopback 1 which I have in the shared VRF which is used for the iBGP peering.
1. Is there any downside to using loopback 0 as the BGP Router-ID even though the other devices cannot reach Loopback 0 since its not being advertised?
2. Since Loopback0 is in the Global RT and the rest of the environment is only reachable via the Shared VRF is there any way to advertise this loopback in the shared VRF? I tried creating a VRF static route with a 'Global' keyword however am not sure what I should specify for the return traffic or what kind of route I should enter in the Global RT. Thx for your help.