From: Mushtaq A. Khan (mak.ccie2b@gmail.com)
Date: Sun Mar 26 2006 - 01:58:04 GMT-3
I also have the same question especially when the synchronization is on and
you redistribute BGP learned route in IGP so you could force iBGP neighbor
to install it in its BGP table.
Mushtaq
On 3/25/06, Mohammed Shameen Abdul Jabbar <ccie.xpert@gmail.com> wrote:
>
> 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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