[mpls-linux-general] DNAT & MPLS

[Antonio M. <ant...@mu...>]

Hello,
I ma doing some testing with Linux + MPLS (/proc/net/mpls_version = 01010702)
My test network is made by a front-end dispatcher (public IP address) that receive MPLS traffic
and many back-end servers (private IP address).

I'd like to dispatch the incoming traffic directed to the public IP address
based on the MPLS label it carries.

Simple Net:

client ---> dispatcher (130.192.a.b) -->n back-end (192.168.c.x)

let's assume a client send IP traffic to 130.192.a.b (dispatcher) with a MPLS label = 255
I'd like to set an iptables rule on the dispatcher as:

iptables -t nat -A PREROUTING -d 130.192.a.b -j DNAT --to 192.168.c.x

this works fine for IP. How can I modify it to match the MPLS label  (255)?
Is there a way to match an incoming packet based on the MPLS it carries?

Thanks a lot and excuse my English :)))

Antonio