[isp-bgp] RE: Data Forwarding

["Kris Foster" <Kris.Foster@...>]

Tulip

An interesting solution could be to run MPLS without penultimate hop popping between the three routers.

Kris

> -----Original Message-----
> From: Tulip Rasputin [mailto:tulip_rasputin@...]
> Sent: Wednesday, January 28, 2004 9:56 PM
> To: isp-bgp@isp-bgp.com
> Subject: [isp-bgp] Data Forwarding
> 
> 
> Hello,
> 
> I have 2 routers (say A and B) at the edge of my network 
> talking EBGP with other Autonomous system
> routers, and who are in turn connected via an intermediate 
> non BGP speaking router (say C). This
> configuration is possible as i may have IBGP routers 
> connected multiple hops away.
> 
> Say A learns 10.0.0.0/8 from its EBGP peer. It advertises 
> this to B via IBGP. My doubt is that how
> will the traffic coming at B destined for 10.0.0.0/8 reach A, 
> when C has no knowledge of
> 10.0.0.0/8? The reason why i am saying that C has no 
> knowledge of 10.0.0.0/8 is because we have
> not redistributed BGP into IGP (which has over the time been 
> proven harmful) and we are not
> running IBGP on C. 
> 
> I suggested putting a default route on C, but my customer is 
> not ready for that.
> 
> Any clues/suggestions to make this thing work?
> 
> Regards,
> Rasputin
> 
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