hi,
I have 2 internet link
i want to forward download traffic from one of them and other traffic from the other.

please help me
thanks

If you're talking about splitting your tx/rx so that all tx are on one connection and rx on another this can't be done with two different internet connections because all packets returning to the internet must be marked with the same source address as the destination address they came in on. You can load balance your two connections by giving more traffic to the better connection with an nth rule.