From: Brian McGahan (brian@cyscoexpert.com)
Date: Mon Nov 25 2002 - 17:51:45 GMT-3
Rich,
Are you using OSPF as your IGP and have synchronization on? If
so, there is an extra condition that you must satisfy to meet the
synchronization rule.
"Paths marked as "not synchronized" in the show ip bgp <longer-prefixes>
output. If BGP synchronization is enabled, which it is by default in
Cisco IOSR Software, there must be a match for the prefix in the IP
routing table in order for an internal (iBGP) path to be considered a
valid path. If the matching route is learned from an OSPF neighbor, its
OSPF router ID must match the BGP router ID of the iBGP neighbor. Most
users prefer to disable synchronization using the no synchronization BGP
subcommand."
http://www.cisco.com/en/US/tech/tk648/tk365/technologies_tech_note09186a
0080094431.shtml
There are many threads that cover this issue, such as the following one:
http://www.groupstudy.com/archives/ccielab/200209/msg01765.html
HTH
Brian McGahan, CCIE #8593
Director of Design and Implementation
brian@cyscoexpert.com
CyscoExpert Corporation
Internetwork Consulting & Training
Voice: 847.674.3392
Fax: 847.674.2625
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Rich Doty
> Sent: Monday, November 25, 2002 2:11 PM
> To: ccielab@groupstudy.com
> Subject: BGP route-reflector client not installing IBGP routes
>
> I have a route reflector R5, and 2 route reflector clients R3, R6. I'm
> passing IBGP routes, and they are seen by R5/R3 in the BGP table. They
> are, however, not being seen as >, or reachable (and injected into the
> IP routing table). Both the destination prefix and next-hop are listed
> in the IGP routing entries, and the prefixes match. Does anyone have
any
> idea why these routes are not being installed?
>
> Thanks,
>
> Rich
This archive was generated by hypermail 2.1.4 : Tue Dec 03 2002 - 07:23:10 GMT-3