[nsp] BGP to IGP Redistribution

[Stephen J. Wilcox]

how far do the specifics get..

what do you have on rtrs a+b - 
sh ip eigrp top
sh ip eigrp neig
sh ip route 10.1.1.0

Steve


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

> 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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> > > 
> > 
>