Re: MPLS Route Targets

Paul,
you are missing my point. I said that same RD was needed if the routes
referred to the same network.

NAT makes no sense if this is the case!

My test was to have a direct comparison of the outcome of doing it
one way or the other (common RD or different RD). So the idea is that
there is one VPN that has two PEs with access to the same network.

If you use same RD, you'll get BGP to do its thing and elect the best
route on intermediate nodes. If you use different RDs then BGP
does not compare those routes *while they are vpnv4 routes*.

-Carlos

Paul Negron @ 24/8/2010 13:44 -0300 dixit:
> Cool.
>
> As you saw. The fact they come into 1 BGP RIB is why you are still able to
> retain route policy between them. It just keeps them from looking the same
> if both clients used the same IP Addressing scheme. Your 10.0.0.0 in this
> case. They are technically 3 different routes that terminate to the same
> place.
>
> The clients may have to run NAT or the provider can do it but only if the
> customer still uses the same addressing scheme on both sides of the cloud.
>
> Paul

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net