RE: RIB failure in BGP

From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Tue Jun 27 2006 - 16:15:15 ART


Hi,

AFAIK there are 2 kinds of Rib Failure in BGP,
The one with a Higher Administrative Distance
The one with a next-hop Mismatch

You can see this by issuing a show ip bgp rib-failure

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122s/122snwft/re
lease/122s25/fs_sbair.htm

And IMHO the difference is that you can announce your Prefix in your local
IGP Domain and also have BGP to announce this prefix to other AS,
Since iBGP has an Administrative Distance of 200, then all other IGP would
win in the selection of the route.
http://www.cisco.com/warp/public/105/21.html

Victor.

-----Mensaje original-----
De: nobody@groupstudy.com [mailto:nobody@groupstudy.com] En nombre de
Mohamed.N
Enviado el: Martes, 27 de Junio de 2006 02:37 p.m.
Para: D.H. Williams; Skinner, Stephen
CC: ccielab@groupstudy.com
Asunto: Re: RIB failure in BGP

then i wonder what is the diff between a normal route prefix and a RIB
failed route prefix in BGP table!

----- Original Message -----
From: "D.H. Williams" <draythw@gmail.com>
To: "Skinner, Stephen" <Stephen.Skinner@rbs.co.uk>
Cc: <ccielab@groupstudy.com>
Sent: Tuesday, June 27, 2006 11:04 PM
Subject: Re: RIB failure in BGP

> Keep in mind, with the bgp suppress-inactive command, you will still see
the
> advertised network in the example I showed you, because it is still in the
> RIB table...
>
> On 6/27/06, Skinner, Stephen <Stephen.Skinner@rbs.co.uk> wrote:
> >
> > guys,
> >
> > here is one for you.
> >
> > I have trawled the archive`s and have found conflicting arguments.
> >
> > RIB - failure in BGP.
> >
> > this can happens because there is a better route to the network
advertised
> > by igp/static in IP routing table already .
> > there are other thing aswell but i am just interested in this.
> >
> > Does the BGP router advertise those RIB-Failed routes along with its
other
> > routes to its BGP peers.
> >
> > Cisco Doc NO
> > GS peps YES
> >
> > does anyone have any experience in this .
> >
> > i am thinking if the route is in BGP but not the IP routing table, it is
> > still a valid route, and should therefore be advertised to other BGP
> > peers ?
> >
> > am i wrong ?
> >
> > TIA
> >
> > Steve
> >
> >
> >
> >
> >
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