01-18-2007 03:54 PM
Hi:
When using the Inter-AS MPLS option of configuring Multihop MP-eBGP b/w RR's in 2 AS's, if the RR's are not configured for next-hop-unchanged, the control plane is fine but the data plane get's broken on the 2 ASBR's - LSP broken (shows Untagged for the next-hop when it should be showing a label)?
Can someone provide a good explanation as to why the next-hop-unchanged should be used on both the RR's?
Thanks.
01-19-2007 04:40 AM
Hi,
can you check, whether the same next hop is in the eBGP update between RRs with or without "next-hop-unchanged"?
Regards, Martin
01-19-2007 02:38 PM
Martin:
Please ignore earlier post.
It does work with or without the next-hop-unchanged - just a new vpn label is assigned by the RR since the next-hop changes here.
So the question now is why use the next-hop-unchanged?
Thanks.
02-03-2007 12:00 PM
Because you may do not want to have RR's in the forwarding path.
HTH
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