[isp-bgp] Best way to filter normal BGP with MPLS-BGP neigbhor ?

[Nathan <paranoia@...>]

Hi,

How do you configure a Cisco to send only MP-BGP routes to a set
of neighbors?

I have a Cisco network running MPLS. Today the only two BGP
speakers exchange full internet routes and the internal MPLS
routes. I didn't find it hard to enable only "normal" BGP
towards my external neighbors, and everything towards the
internal neigbor, just a matter of only specifying the internal
peer-group in the vpnv4 section.

Now I want to add two more internal routers that should just
receive the MP-BGP routes and not the internet routes, for the
obvious reasons (the new ones have no need for internet routes
and don't have the horsepower for them anyway).

I'd like to set it up so that I have three peer-groups, one for
eBGP, one for non-MPLS iBGP, and one for MP-BGP, with double
IP addresses and corresponding update-source for the two big
routers who exchange both kinds of routes.

But what is the recommended way to avoid sending out the
internet routes to the internal MPLS-only neighbors ? I've been
toying with route-maps and things like that, but the "just turn
it off" method eludes me.

Thank you for any help!






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