[nsp] BGP to IGP Redistribution

[Stephen J. Wilcox]

RIP v1 or v2?

What are you redistributing into which protocols - RIPA-BGPA, RIPA-EIGRPA, etc

Are BGPA and BGPB talking iBGP?

Which protocols are running auto-summary?

Steve

On Tue, 12 Aug 2003, Hawthorne, Austin J [IT] wrote:

> Hopefully someone can help with the following scenario:
> 
> BGP_A <---> RTR_A <---> EIGRP <---> RTR_B <---> BGP_B
> 
> BGP_A and BGP_B are learning about the following networks via RIP (via network statements, links not depicted):
> 
> BGP_A:  10.1.1.0/27
> BGP_B:  10.1.1.32/27, 10.1.1.64/27, 10.1.1.96/27
> 
> BGP_A and BGP_B are configured to announce aggregate of 10.1.1.0/24 (summary plus specifics).
> 
> EIGRP is configured to redistribute BGP.
> 
> Here's the problem:
> 
> I would assume that RTR_B would learn of RTR_A's prefixes via EIGRP (and vice versa)...this is not the case.  What I am seeing is that RTR_B learns the aggregate from RTR_A (but not vice versa, split horizon thing I think), yet no specifics are learned?
> 
> Can someone explain the behavior I am seeing?
> 
> Thanks, 
> 
> Austin
> 
> 
> 
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