You could be running into an issue I found while working a lab last night and again in another lab within the past few weeks. It has to do with redistribution of OSPF into BGP and the requirements BGP has around best path selection. I'm still learning all the issues around how this issue is introduced, but in my case the lab said I couldn't configure iBGP in full mesh, and a had to enable synchronization. This causes the following problem with routes being added to the route table:
If BGP synchronization is enabled, there must be a match for the prefix in the IP routing table in order for an internal BGP (iBGP) path to be considered a valid path. BGP synchronization is enabled by default in Cisco IOS® Software. If the matching route is learned from an Open Shortest Path First (OSPF) neighbor, its OSPF router ID must match the BGP router ID of the iBGP neighbor. Most users prefer to disable synchronization with use of the no synchronization BGP subcommand. reference: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094431.shtml#background Not sure if this helps you or not, but I'd like one of the experts to expand on this issue a little more. I'm not sure I'd be able to detect this condition in a lab b/c the conditions are subtle. thanks _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
