Velocity Reviews - Computer Hardware Reviews

Velocity Reviews > Newsgroups > Computing > Cisco > IBGP issue

Thread Tools

IBGP issue

mprasad079 mprasad079 is offline
Junior Member
Join Date: Dec 2012
Posts: 12
Hi All

I have topology, R1-R2 and R3 and R4 and R5 -R6 is in IBGP.
R1-R3, R3-R5 R2-R4 R4-R5 R4-R8 and R3-R7 are in EBGP.

R8 Conf

R8#sh run | s bgp
router bgp 8
no synchronization
bgp log-neighbor-changes
network mask
network mask
network mask
network mask
network mask
network mask
network mask
neighbor remote-as 34
no auto-summary

R4 gets all loopback IP's and also adver to its neighbor R3, which is in iBGP but R3 does not show any best path to loopback IP's of R8.

R3>sh ip bgp
BGP table version is 4, local router ID is
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
*> 0 0 7 i
* i10.0.1.0/24 0 100 0 8 i
* i10.0.2.0/24 0 100 0 8 i
* i10.0.3.0/24 0 100 0 8 i
* i10.0.4.0/24 0 100 0 8 i
* i10.0.5.0/24 0 100 0 8 i
* i10.0.6.0/24 0 100 0 8 i
r> 0 0 7 i
* i172.16.48.0/27 0 100 0 8 i

Please let me know what is blocking? Normal scenario, routes learn from EBGP get adver to IBGP peer and reachable. But in this I am not getting any best path.

R3>sh ip bgp
BGP routing table entry for, version 0
Paths: (1 available, no best path)
Not advertised to any peer
8 (inaccessible) from (
Origin IGP, metric 0, localpref 100, valid, internal

Last edited by mprasad079; 12-23-2012 at 07:50 AM..
Reply With Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
can EIGRP replaced with IBGP Pravin Pednekar Cisco 3 11-16-2004 03:16 AM
ibgp routing tables not filling up Todd Adamson Cisco 2 10-13-2004 11:07 PM
Redundancy concept help with BGP/IBGP and HSRP Blackjack Cisco 2 09-28-2004 04:24 PM
Redundant VPN with IBGP - Newbie Question Charles Jennings Cisco 1 06-04-2004 03:23 AM
iBGP and Loopback Gary Cisco 1 03-05-2004 10:32 PM