Hi - Im currently running a GNS3 lab with 4 3640 routers. I am running OSPF & BGP, OSPF to redistribute my connected subnets - and BGP to redistribute my static subnets. 3 out of the 4 seem to be working properly. Core #1, 2 and 4 are receiving the proper static routes including the gateway of last resort. However core #3, is only getting routes from Core #4 for some reason. All BGP sessions are up and established. Not really sure why its not working.
I attached the BGP configs and routing table outputs below. Is there something Im missing?
Ill take a screen shot of the diagram in a bit. As for the full mesh that was the end goal - but I ran in to this issue first. I ran sh bgp ipv4 unicast neighbour X.X.X.X advertised and see Core 1 advertising correctly to 2 and 4. Doing some more reading - I see why Im having the issue, which is more or less the design of iBGP.