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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical BGP Configuration Problem
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? Thanks, Michael +----------------------------------------------------------------------------+ | Michael H. Lambert, Network Engineer Phone: +1 412 268-4960 | | Pittsburgh Supercomputing Center FAX: +1 412 268-8200 | | 4400 Fifth Avenue, Pittsburgh, PA 15213 [email protected] | +----------------------------------------------------------------------------+ - - - - - - - - - - - - - - - - -
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