From: Peter van Oene (pvo@usermail.com)
Date: Tue Oct 15 2002 - 17:01:52 GMT-3
I'm not sure I fully understand you, but were you looking for D to receive
an IBGP update from C and forward it to B? If so, this would violate the
BGP specifications that dictate that a BGP speaker cannot forward IBGP
learned paths. Hence the need for full IBGP meshes. If D were a route
reflector, than you would see this behavior.
At 10:09 PM 10/14/2002 -0500, Wright, Jeremy wrote:
> i did not have neighbor statements for router C in router B and in router B
>for router C....that fixed it but why didnt router B pass the loc pref up
>since it is in the same AS and has a neighbor statement in it.
>
>-----Original Message-----
>From: Wright, Jeremy
>To: 'ccielab@groupstudy.com'
>Sent: 10/14/02 9:45 PM
>Subject: Local Preference Problem
>
>here is my topology (same topology as page 559 of the gold
>saterlee/hutnik
>book). router A (loopback 1.0.0.0) is in AS100 ebpg peering with router
>B
>and router C. both router B and C are in AS200. router B and C both have
>a
>link to router D which is also in AS200. im using ospf as my igp in
>AS200. D
>can reach A fine by bgp. ive configured router C to increase the local
>preference to 200 of inbound routes from router A (about network
>1.0.0.0).
>when i do a sh ip bgp on router D the local preference is 200 and is
>going
>through router C to get to 1.0.0.0 which is what i wanted. however, i
>cannot
>get D to pass the local preference up to B that is in the same AS200. i
>have
>cleared ip bgp * on all AS200 routers. its my understanding that local
>preference is passed within AS200(not externally) but I cant get router
>B
>the local preference info from D. am i missing something? thanks team.
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