[nsp] RIB-Failure ???

Ron Lewkiewicz rsl@exodus.net
Thu, 25 Jul 2002 16:37:31 -0700


1. Symptom :

   If the prefix get Rib-Failre when installing into bgp table because of
   there is already has a prefix in the routing table with a prefered admin
   distance (like already learnd by ospf), then this prefix should not be
   advertised to other bgp peers unless the next-hop is the same as the 
   in the ip routing table.
   But the behavior is that even if the next-hop is the same, this 
prefix still
   does not advertise to it's bgp peers.

2. Conditions :

   You should see the bgp prefix get a "Rib-Failure" in the output of
   "show ip bgp <x.x.x.x> ". This will confirm that this prefix fails to
   install into the routing table. Then check the next-hop for the bgp 
   and the prefix that already in the ip table (it's ospf in this ddts). If
   they are the same, then bgp should still advertise this prfix to it's bgp

3. Workaround :

    Thers is not workaround for this problem.

Ezequiel Carson wrote:
> Hello,
>       Have you seen this message on sh ip bgp ??
> Paths: (1 available, best #1, RIB-failure(17)) 
> R2#sh ip bgp
> BGP routing table entry for, version 8
> Paths: (1 available, best #1, RIB-failure(17))
> Multipath: iBGP
>   Not advertised to any peer
>   Local
> from (
>       Origin IGP, metric 0, localpref 100, valid, internal, best
> R2#
> Im running IOS 12.2(8)T5 , it ocurrs when a route is learned via OSPF
> and BGP. OSPF wins,but BGP invalidates this prefix from his RIB and it
> is on allowed to advertised to any peer.
> Any suggestion?
> Comment: This is not happening with another version like 12.0(21)ST.
> Thanks
> Ezequiel
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