From: Peter van Oene (pvo@xxxxxxxxxxxx)
Date: Mon Apr 29 2002 - 14:28:37 GMT-3
if this is the solution, I would suggest that the question is seriously
flawed.
At 08:58 AM 4/29/2002 -0400, Bauer, Rick wrote:
>Actually, a confederation is the way to work around the sync issue, if you
>can not disable sync, or put the routes in the igp, or add statics to the
>ibgp peer receiving the routes. HTH....
>
>-----Original Message-----
>From: Joe Higgins [mailto:netsat@optonline.net]
>Sent: Sunday, April 28, 2002 9:03 AM
>To: Michael Jia
>Cc: ccielab@groupstudy.com
>Subject: Re: BGP OSPF sync with Route Reflecter
>
>
>This scenario of bgp and ospf over a route reflector setup in absolute terms
>cannot work because of the inherent design of ospf and bgp. Previous posts
>explain why this is so. I suggest that if one finds oneself in a situation
>where they find it impossible to put in the "no synchronization" command
>then
>they should start thinking outside the "BOX" and possible peer the route
>reflector clients with each other, or run igrp or eigrp on top of ospf on
>the
>route reflector portion of their network. This horse has been beaten up
>pretty
>badly. Good luck.
>Joe H.
>
>Michael Jia wrote:
>
> > Hi,
> >
> > I have a general question regarding BGP and OSPF sync when router
>reflector
> > is
> > used. I've seen some threads discuss it before on the list.
> >
> > The scenerio is like :
> >
> > R1 ---- R2------ R3
> >
> > All R1, R2, R3 are in same AS, R1 and R3 peer to external AS.
> > R2 is the route reflecter with iBGP peered to both R1 and R3.
> > R1 and R3 doesn't peer with each other.
> > OSPF is used as IGP for R1, R2 and R3.
> >
> > When a eBGP route is redistritued at R1 into OSPF. The route's
> > BGP id is R1, its OSPF id is also R1.
> > iBGP syncs at R2 without question.
> >
> > However, it doesn't sync at R3. Because from R3, it sees iBGP id as R2,
> > the Reflector's ID, but OSPF id is still R1. (Am I right? please correct
>me
> > if my logic is wrong. At a live lab, if R3 peer with R1 , the route will
> > sync
> > immediatly. In R3's routing table, it clearly has the route and the next
>hop
> > route as OSPF routes. )
> >
> > The question is, how to make it sync without using "no sync" at R3?
> >
> > Thanks a lot.
> >
> > Michael
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