From: backbone systems (backbone.systems@gmail.com)
Date: Sat Apr 28 2007 - 02:56:07 ART
Dear GS,
I have question regarding RIB failure
"If a route is appearing in BGP table as "r"' can that route be advertised
to any EBGP or iBGP peer?"
ok the scenario is that on R1 sync is enabled and i am learning
5.5.5.5route from an IBGP peer .I am also redistributing this route in
OSPF as sysn is enabled and i must learn the route from IGP too.The route
from ospf is installed in routing table b/c of the
better admin distance.The route from the IBGP peer is appearing as RIB
failure b/c a better route is there in routing table .
Now can this "r" route be advertised to an any BGP peer????
To get a clear pic,if some body has done IE advanced technolgy labs .In the
BGP section there is a scenario named "IBGP Syncronization".
In this lab the route 5.5.5.5 is appearing as "r" in BGP table but it is
still being advertised to an EBGP peer ?Am i missing something?
Can somebody clarify this.
Secondly in the sh ip bgp 5.5.5.5 out put below what is meant by "table
Default-IP-Routing" because when i tried to this lab the only thing
that was missing from my output was this.
R1#show ip bgp
BGP table version is 8, local router ID is 14.0.0.1
Status codes: s suppressed, d damped, h history, * valid, >
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf
Weight Path
*> 4.4.4.4/32 14.0.0.4 0
0 4 i
r>i5.5.5.5/32 25.0.0.5 0 100
0 5 i
R1#show ip bgp 5.5.5.5
BGP routing table entry for 5.5.5.5/32, version 8
Paths: (1 available, best #1, table Default-IP-Routing-
Table, RIB-failure(17))
Advertised to non peer-group peers:
14.0.0.4
5
25.0.0.5 (metric 855) from 23.0.0.2 (25.0.0.2)
Origin IGP, metric 0, localpref 100, valid, internal,
synchronized, best
R4#show ip route 5.5.5.5
Routing entry for 5.5.5.5/32
Known via "bgp 4", distance 20, metric 0
Tag 1, type external
Last update from 14.0.0.14.0.0.1 00:00:57 ago
Routing Descriptor Blocks:
* 14.0.0.1, from 14.0.0.1, 00:00:57 ago
Route metric is 0, traffic share count is 1
regards
backbone
This archive was generated by hypermail 2.1.4 : Tue May 01 2007 - 08:28:38 ART