Ibgp issue

[ankitnaik2992]

Hello Guys,

I have a strange problem with route reachability received from ibgp. 

ISP X router (ebgp)==== Router A (ibgp) ==== router B (ibgp)====ISP Y router(ebgp).

I am receiving routes from both X and Y ebgp routers.

From  A's point of view, when I receive route from Y via ibgp B router, route is unreachable although i can see it in the routing table of A received via ibgp B router. Same route is reachable from router B. If i do trace from Router A, it gets dropped at Router B, but routing table show the route received from Router B.

Next-hop-self is enabled for all peer, redistributed static routes and connected. All connected subnets are in network command. 

Thank you

[Harold Ritter]

Hi,

 On router A, Can you do a "show bgp ipv4 uni x.x.x.x" for one of the routes in question and a "show ip route x.x.x.x" for the next hop.

Regards,

[ankitnaik2992]

Sure, i ll do that. Meanwhile I have one quick question. Can ebgp peer drop my upload traffic ( ibgp originated ) using regular expression. ?

[paul driver]

Hello

Just like to add to @Harold Ritter comments do you have the nexh-hop-self feature applied to the correct peer(s) which would be each in this case be between rtr A-B ibgp peerings?

[ankitnaik2992]

Yes.. next-hop-self is enabled on correct peers.