From: Geert Nijs (geert.nijs@simac.be)
Date: Sat Feb 04 2006 - 17:28:32 GMT-3
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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