[asr9k] cgn/mpls

Question

Hi, Community:
I've been trying to find the best solution for the following problem.
As I understand it, for me to send IP traffic to an ISM or VSM on an ASR9k for CGN(ex: NAT44), the solution would be to use ABF and configure the ISM/VSM as next-hop for pre-NAT outgoing traffic. My question is this: ABF deployment guide says that ABF does not support mpls-labeled traffic, in other words if an IP-packet I want to NAT comes in labeled, ABF would not be able to catch it an redirect it to VSM so it would be NATed. Can anybody share a posible (best) solution to this scenario?
Thanks,
c.

Answer 1

Thanks for your answer, nifevrie .
That's exactly the point, in my environment my PE (in this case a CMTS running mpls for l3vpn) has to have labels for L3VPN setup. This PE also has Internet access service. It connects to 2 ASR9000 P routers, that are the correct place for me to install an ISM or a VSM. So basically, the originating router would 'have to do PHP'. 
So basically, for me to get to the CGN card, as far as I can tell, my 'only' option is the loop. I saw this being described in a CiscoLive presentation. Let's forget for a moment that is not an elegant solution, we're talking 10-20G of traffic here per POP. I cannot fathom telling my customer they have to invest in the CGN card AND 2-4 10G interfaces per loop, per ASR.
Seems to me it makes sense to work on ABF being able to catch mpls labels.
Regards,
c.