[nsp] BGP to IGP Redistribution

[Hawthorne, Austin J [IT]]

Sorry...

RIPv2, 

RIP_A into IGP, network statement brings into BGP_A, same for RTR_B.

Redistribute BGP_A into EIGRP_A, and same for RTR_B.

BGP_A and BGP_B are in same AS (no iBGP) and run eBGP to another AS.

No Auto-Summary on any of the protocols.

Expect RIP_A learned routes to appear in EIGRP_A and announced to RTR_B
via EIGRP.

Thanks, 

Austin

> -----Original Message-----
> From: Stephen J. Wilcox [mailto:steve at telecomplete.co.uk]
> Sent: Tuesday, August 12, 2003 10:59 AM
> To: Hawthorne, Austin J [IT]
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [nsp] BGP to IGP Redistribution
> 
> 
> 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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