Friday, February 5, 2021

BGP and VRRP

We have the following topo:

NET (2 ISPs)

switch stack

| \

R1 R2

| /

core switch

etc

Scenario is : 2 ISPs, the network on the "inside" is public (ex. 92.0.0.0/24) . Routers have IPs on their internal interfaces 92.0.0.1 and 90.0.0.2 .vrrp is running between them with OSPF configured between the routers and the switch stack. the VIP is the same as the R1, which makes it Master. From the outside we can ping R1, but not R2 (90.0.0.2). When we force a failover, we can ping the second routers internal IP.

Up until now there was a single router with IP 90.0.0.1 and BGP peering with the ISP was done with that IP. We don`t want to run BGP on the VIP and so there must be 2 BGP sessions at the same with with peers R1 and R2.

Right now we have a lab scenario, and until we figure it out can`t take the whole thing into production. In short: is it normal that we can`t ping R2 from the "outside" (while it is backup vrrp router) and does that mean there can`t be a BGP session on it?

Sorry for bad english.



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