From: haducbinh (haducbinh@vnpro.org)
Date: Fri Nov 24 2006 - 01:01:13 ART
The first, thank you for all yours explain!
And the second, Xiangling, RIB-failure routes will be advertise to IBGP and
eBGP, if you want to disable this behaviour, using this command:
R5(config-router)#bgp suppress-inactive
HaDucBinh
Mail: <mailto:haducbinh@vnpro.org> haducbinh@vnpro.org or
haducbinh@gmail.com
Phone: +84 908 191 322
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From: Xiangling [mailto:xianglingzj@gmail.com]
Sent: Friday, November 24, 2006 10:47 AM
To: Scott Morris
Cc: haducbinh; ccielab@groupstudy.com
Subject: Re: BGP RIB_failure
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
<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: <mailto:haducbinh@vnpro.org> haducbinh@vnpro.org>
haducbinh@vnpro.org or
haducbinh@gmail.com
Phone: +84 908 191 322
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