North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: BGP Configuration Problem
Make sure router B doesn't do auto-summary in BGP. -- jli > > On Thu, 07 Nov 1996 22:21:15 -0500, [email protected] writes: > > > >We are having a BGP configuration problem which looks trivial but is not > >working the way we expect. I'm going to throw myself on the mercy of > >the court and ask for help. > > > >There are three routers A, B and C. These are in ASa, ASb and ASc, > >respectively. B imports 10.1.64/19 from A and 10.1/16 from C. What > >we were expecting was for B's route to the /19 to be via A, just because > >this is the more specific route. However, the only route (both in the > >BGP and routing tables on B) is for the entire /16 via C. > > > >I have a hunch that what is happening is that B is saying "gee, I can > >get to the entire /16 by going through C, so why bother with A". If I'm > >not mistaken, this can be fixed by introducing local_pref for both peers. > >Could someone please comment on this? > > > If B is hearing the route from A, it should at least show up in the BGP > table. The behavior that you expect is what it should be doing; it > sounds to me like B is not even hearing the BGP announcement from A. > Check how you have accept policies configured on B, and how you have > announce policies configured on A, and when in doubt, call your router > vendor for help. :) > > -Jon > > ----------------------------------------------------------------- > * Jon Green * * > * [email protected] * This space for rent pending * > * Finger for Geek Code/PGP * me thinking up a witty quote. * > * #include "std_disclaimer.h" * * > ------------------------------------------------------------------------- > - - - - - - - - - - - - - - - - -
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