From: ccie2be (ccie2be@nyc.rr.com)
Date: Sun May 29 2005 - 19:01:04 GMT-3
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Peter van Oene
Sent: Friday, August 13, 2004 3:34 PM
To: ccielab@groupstudy.com
Subject: Re: RIB Failure - Advertisement
At 01:34 PM 8/12/2004, gladston@br.ibm.com wrote:
>Even with a RIP failure, the result of "show ip bgp neigh adv" showed that
the route having a R flag was advertised. Cisco says that it is not
advertised.
>Any Comments?
If I recall correctly, you get rib-failure when the BGP route is not the
preferred route do to overlap with a more preferred route. Whether or not
you advertise these routes is an implementation choice. Juniper does not by
default, but has a knob called advertise-inactive to change that before.
I'm thinking Cisco has chosen to advertise them.
>=====================================
>Quoted:
>
>Q. What does r RIB-Failure mean in the show ip bgp command output below?
>
>R1> show ip bgp
>BGP table version is 5, local router ID is 200.200.200.1
>Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
> r RIB-failure
>Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
>r> 6.6.6.0/24 10.10.13.3 0 130 0 30 i
>*> 7.7.7.0/24 10.10.13.3 0 125 0 30 i
>When BGP tries to install bestpath prefix into Routing Information Base
(RIB), i.e., the IP Routing table, RIB might reject the BGP route due to any
of the following reasons:
>
>Route with better administrative distance already present in IGP, for
example, if a static route already exists in IP Routing table.
>Memory failure.
>The number of routes in VPN routing/forwarding (VRF) exceeds the
route-limit configured under the VRF instance.
>In such cases, the prefixes that are rejected for the above reasons are
identified by r RIB Failure in the show ip bgp command output and are not
advertised to the peers. This feature was first made available in Cisco IOS
Software release 12.2(08.05)T.
>===================================
>
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