As far as I know, the Tomato Dualwan provides the way of combining two LANs to one. However, I have tested it and found that was not stable, the router reboots every hour and the load of CUP was always 100%. Is there any firmware else that supports dual / multi-wan? Here is the network environment I have. A Network Cable provided from ISP. A Network Switch. Two broadband accounts. Two short LAN Cable. A Linksys WRT54G V2 Router. I used the switch to split the Network Cable into two and connected them to the router and dialed up with two different accounts via PPPoE. And here is the illustration.