[c-nsp] MPLS VPN EIGRP tag/route redistribution ideas at PE

[Ben Steele]

Scenario: cluster of PE's terminating DSL CE's running EIGRP between  
CE and PE in MPLS VPN's, so the CE's could terminate on any one of the  
PE's.

Problem: would like to identify EIGRP routes from certain neighbors  
for BGP redistribution to use "set extcommunity cost pre-bestpath x x"  
for weighting within the vrf, unfortunately when you are talking about  
multiple CE's on the same PE it becomes hard to distinguish the routes  
from one to another in BGP eyes as the origin is incomplete.

Solution: I would like the solution to be independent of the CE if  
possible, so far I have thought about a route-map that would contain  
the prefixes I am interested in configured on each PE that would set  
the pre-bestpath based on the route-map prefixes so that way it  
doesn't matter where the CE lands the prefixes get the appropriate  
setting. This is a little bit of an administrative over hang should  
the C decide to change their prefixes at any stage, what I would like  
is some sort of tag I can put on within the eigrp vrf that will carry  
through to the BGP vrf to match on, so I can match purely based on the  
EIGRP neighbor on the EIGRP side of things then just have BGP match on  
a tag/value, any ideas?

Cheers

Ben