All the routes from AS 1 are coming from the same CE. There is on config to change the next-hop anywhere. There is no special config for any prefix. 172.16.111.1 is the IP address of the interface connecting it to AS 100. 172.16.111.2 is its neighbor in AS 100. Can anybody explain this?
Ok, I've moved forward. Setting next-hop self on the 172.16.112.1 seems to resolve the issue. However, on an eBGP session, I do not think this is required.
The other question is why all the prefixes are not affected. I realised that the prefixes affected are those that in the global routing table. So why will the router set the next-hop to itself when the prefix is in the global table.
These are the relevant configs, without the next-hop self
Hi mate i thought i would post what we discussed already on email to let everyone else know who may encounter this issue. I believe this is a bug and not the way things are supposed to work. I will draw your scenario out differently to make it easier for people to understand.
OK so the link between P and PE1 of AS99 has ip address of 220.127.116.11/30 - within VRFA router there is a loopback interface which has the IP address of 18.104.22.168/30.
In this circumstance there is no way that the route from VRFA will ever be announced via PE1.WHY?? Because PE1 has that route already within its own global routing table. I have seen this on many occassions while studying for my CCIE SP and have always put it down to crappy software that i am using. Its got to be a bug otherwise there will be quite a few SP's out there who will get caught out with this when it comes time for MPLS global domination ;-). Hope this helps.
Oh and as there seems to be a new fashion for point scoring - please rate all posts.
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