From: Carlos Alberto Trujillo Jimenez (carlos.trujillo.jimenez@gmail.com)
Date: Fri Mar 07 2008 - 10:31:05 ARST
Hi Jorge.
A Rib Failure happens when a prefix is present in the bgp table, as well as
in the routing, means the router recibes the same prefix via IBGP as well as
ANY IGP (OSPF, RIP, EIGRP).
According to the administrative distance ANY IGP is prefered over any IBGP
ROUTE. Thats why the route is still present in the routing table, but
learned via any of the IGP you are using in your network.
If you have a RIB-FAILURE you can test it and it must work fine, you must
have reachability to that prefix.
From the BGP point of view, that route present in the bgp table (as
RIB-FAILURE) is still propagated via bgp to its neighbors.
if you want to remove the RIB-FAILURE in your bgp table you may adjust the
ADMIN DISTANCE of the IGP to be higher than the IBGP or may REDUCE the IBGP
admin distance to be lower than the IGP.
cheers.
2008/3/7, Vazquez, Jorge <Jorge.Vazquez@acs-inc.com>:
>
> Any advice or comment about this? I would like to know what is correct
> solution when a RIB-failure appears, cause trying to fix that may impact
> the
> routing in all the network topology and maybe it may not be necessary.
>
>
>
> Jorge
>
> _____
>
> From: Vazquez, Jorge
> Sent: Thursday, March 06, 2008 10:29 AM
> To: ccie forum
> Subject: BGP Table on the Lab Exam
>
>
>
> I have completed some IE labs in the last days, I have one question about
> the BPG table, in case I get some routes with RIB-failure, do I have to
> fix
> that or is that ok to have some routes on RIB-failure?
>
>
>
> Regards,
>
>
>
> Jorge
>
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