We have three routers connected by serial link back to back. Router_A-->Router_B--->Router_C.
Each router has fastethernet enabled. All routers are in same AS. We have BGP relationship established between Router_A and Router_B
and Router_B and Router_C. Ethernet subnet is published by using network command in all routers. Problem is Router_C is not learning Router_A subnets. Similarly Router_A is not learning Router_C subnets.
I checked on Router_B it is learning routes from both Router_A and also from Router_B.
When I checked advertised-subnets to that neighbor on Router_B, it is not advertising subnets learned from either Router_A or Router_C. Naturally that neighbor will not learn about those subnets.
Do we need to establish neighbor relationship between Router_A and Router_C also ? I have given no sync, no auto-summary and also next-hop-self conmmands. ( there is no external AS all routers are in same AS)
What I was expecting is that subnets may be learned and may be due to some reason those may not end up in routing table ( best route ) but even that is also not taking place !!
Please share the experience.