From: Mohammed Shameen Abdul Jabbar (ccie.xpert@gmail.com)
Date: Sun Mar 26 2006 - 01:29:56 GMT-3
Hi,
In the actual LAB, is there any problem if there are RIB failures in
the BGP table?
Any points deducted? I supose that it depends on the scenario!!
Regards
shamin
On 2/5/06, Geert Nijs <geert.nijs@simac.be> wrote:
> Yep this is correct.
> It means a route in the BGP table is selected as "best" route, but it
> cannot be inserted into the routing table because
> a route with a better AD is already present.
>
> This could be normal in the following situation:
> -----BB--------
> | |
> R1 ------ R2
>
> Both R1 and R2 are receiving the same routes from the backbone (eBGP).
> R1 and R2 are also running a iBGP session
> Both R1 and R2 redistribute BGP into ie EIGRP
> Router R1 is prefered by setting the Local Preference to ie 200 on
> received routes.
>
>
> In this situation R2 will have lots of routes marked as "RIB failure".
> Why ?
>
>
>
> R2 will receive the same networks from BB and from R1
> R1 will be prefered (LP of 200). R1 routes are iBGP routes (AD 200).
> R2 selects these routes as "BEST" but cannot insert these routes in the
> routing table since EIGRP routes from R1 are already present in the
> routing
> table of R2 (AD 170 - redistributed)
>
>
> Geert
> CCIE #13729
>
> -----Oorspronkelijk bericht-----
> Van: nobody@groupstudy.com [mailto:nobody@groupstudy.com] Namens
> Jonathan Stevens
> Verzonden: zaterdag 4 februari 2006 17:03
> Aan: Andrew Ballantyne (aballant)
> CC: ccielab@groupstudy.com
> Onderwerp: Re: RIB failure in BGP?
>
>
> I think the definition is that BGP is unable to put the route into the
> routing table. This can be related to administrative distance. It is not
>
> always undesirable.
>
> Andrew Ballantyne (aballant) wrote:
>
> >Hi,
> >
> >What does RIB-failure indicate in BGP?
> >
> >cheers, Andrew
> >
> >R2#sh ip bgp
> >BGP table version is 4, local router ID is 2.2.2.2
> >Status codes: s suppressed, d damped, h history, * valid, > best, i -
> >internal,
> > r RIB-failure, S Stale
> >Origin codes: i - IGP, e - EGP, ? - incomplete
> >
> > Network Next Hop Metric LocPrf Weight Path
> >r> 10.1.2.0/24 1.1.1.1 0 0 65001 i
> >*> 10.1.8.0/24 1.1.1.1 0 65001 i
> >
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