load balancing multiple gateway using route and iptables

Question

under linux, how do I load balancing multiple gateway by using route, note that I have one input interface lets say eth0, and one output interface lets say eth1. eth1 can connect to multiple IP gateway where each of those gateway has its own internet provider

Answer 1

You use iproute2. Details on setting that up are at http://lartc.org/howto/lartc.rpdb.multiple-links.html