[c-nsp] MPLS Label propagation and/or MP-BGP and/orroute-reflecting, oh my.

Oliver Boehmer (oboehmer) oboehmer at cisco.com
Fri Jan 21 14:58:38 EST 2011


[...]
> I have a feeling that there's some fundamental concept of how this is
all
> supposed to work that I'm just not getting.  If anyone sees anything
that
> warrants a slap with the clue-bat, I'd be grateful.

Your PE1 and CE are in the same AS, and IOS does not support iBGP as
PE-CE routing protocol.. So this is a one problem. The issue with lack
of iBGP PE-CE support is the fact that the vpnv4 next-hop is not
rewritten to the PE1's loopback, so the other PE's in the network will
not find an LSP towards the unchanged nexthop, but you can somehow make
this work re-writing the vpnv4 nexthop before sending the vpnv4 update
to the peers. Still unsupported, though. 
I don't know why PE3 doesn't see the prefixes learnt from your CE1,
would need to look at this in detail. But if PE2 sees the prefix, and
PE3 also has a vpnv4 session to PE1, PE3 should see it. can you enable
bgp debugs to check what's happening?

	oli



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