Routing protocol between two 7K's

[ALIAOF_]

Is there a reason/benefit to run two routing protocols between 7K's such as iBGP and OSPF?

[Richard Burts]

We do not know enough about your environment to provide a good answer. We can say that if you are running BGP for external connectivity then it frequently is good to run a protocol like OSPF as the Interior routing protocol.

HTH

Rick

[ALIAOF_]

Thank you Richard that is what I am normally used to i.e; running eBGP externally and OSPF internally.  However in my scenario now there are two 7K's and they have a peer link with each other.  On that not only OSPF is running but also iBGP.  So I am trying to understand what would be the benefit of running two routing protocols between 7K's I have always seen OSPF normally.

[Richard Burts]

You mention running IBGP on the link between peers but have not told us if there is any other BGP running on other interfaces. If there is BGP on other interfaces then IBGP between the peer 7Ks would make good sense.

HTH

Rick

[ALIAOF_]

Thank you for the response and apologies for the late reply.  Here is the BGP config if it helps:

router bgp 65001
  timers bgp 5 15
  address-family ipv4 unicast
    redistribute direct route-map BGP
    redistribute static route-map BGP
    redistribute ospf 1 route-map BGP
    redistribute ospf 5 route-map BGP
  neighbor 10.10.10.2 remote-as 65501
    address-family ipv4 unicast
  neighbor 10.20.20.2 remote-as 65002
    address-family ipv4 unicast
      soft-reconfiguration inbound
  neighbor 10.30.30.2 remote-as 65003
    address-family ipv4 unicast
  neighbor 10.1.1.2 remote-as 65001
    address-family ipv4 unicast

I don't understand why there is iBGP as well as OSPF no the vpc peer link what is the benefit I mean.

[Richard Burts]

The reason for IBGP is that you have two routers running EBGP. The two routers are in AS65001 and have neighbors in other AS (which is what makes it EBGP - at least one neighbor is in a different AS). When two routers in the same AS (65001) are running EBGP then you need to run IBGP between these routers.

HTH

Rick