From: Xiangling (xianglingzj@gmail.com)
Date: Fri Nov 24 2006 - 00:47:28 ART
I got one more question actually: Will RIB-Failured routes been advertised
out to eBGP neighbours?
Say I got a senario that R1 --(eBGP)-- R2(iBGP with R4) --(OSPF)--R3
--(OSPF)--R4(iBGP with R2)
When R4 advertise a route to R2 by network command via both OSPF and BGP, it
will shows as RIB failure in BGP table of R2. Then will this be advertised
out to R1 by eBGP?
On 11/24/06, Scott Morris <swm@emanon.com> wrote:
>
> RIB Failure isn't always a bad thing. All it means is that BGP tried to
> give it to the routing table, the the routing table said "No thank you."
>
> In your case below, you already have the route via EIGRP (AD=90) and you
> are
> trying to present a BGP route of the same set (iBGP AD=200) and the
> routing
> table rejects it.
>
> It's a good idea to see these things and be able to identify WHY this is
> occurring, because in your lab exam you may have scenarios where this is
> not
> the preferred outcome and then find some way to change it. (lowering ibgp
> AD or raising EIGRP, perhaps just for that route?)
>
> HTH,
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
> #153, CISSP, et al.
> CCSI/JNCI-M/JNCI-J
> IPExpert VP - Curriculum Development
> IPExpert Sr. Technical Instructor
> smorris@ipexpert.com
> http://www.ipexpert.com
>
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> haducbinh
> Sent: Thursday, November 23, 2006 1:28 PM
> To: ccielab@groupstudy.com
> Subject: BGP RIB_failure
>
> Hi GS!
>
>
>
> I do not understand what is RIB_failure in BGP?
>
> R2 and R4 run BGP and EIGRP, subnet 22.22.22.0/24 is advertise via EIGRP
> from R2 to R4!
>
> And then, i try to advertise it via BGP from R2 to R4, too
>
>
>
> This is result that I see on R4:
>
> R4#sh ip route
>
> .
>
> 22.0.0.0/24 is subnetted, 1 subnets
>
> D 22.22.22.0 [90/2297856] via 172.16.124.2, 01:23:03,
> Serial0/1/0.124
>
>
>
> R4#sh ip bgp rib-failure
>
> Network Next Hop RIB-failure RIB-NH
> Matches
>
> 22.22.22.0/24 172.16.124.2 Higher admin distance
> n/a
>
>
>
> R4#sh ip bgp
>
> BGP table version is 11, local router ID is 172.16.104.1
>
> 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>i22.22.22.0/24 172.16.124.2 0 300 0 i
>
>
>
> Please explain this!
>
> Thanks!
>
>
>
> HaDucBinh
> Mail: <mailto:haducbinh@vnpro.org> haducbinh@vnpro.org or
> haducbinh@gmail.com
>
> Phone: +84 908 191 322
>
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-- Thanks & Regards, Xiangling |-------------------------| | | \ I Love You All / \ / \___________/
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