This is the first thing I tried which does give me outgoing access but then I have 2 DHCP servers and no ability to route incoming traffic through both routers. I tried DMZ and forwarding all ports...

Region : Canada Model : TL-MR3020 Hardware Version : V1 Firmware Version : ISP : Hello. I have a 3G USB modem and I would like to connect it to a TP-LINK dual wan router. I bought an MR3020 3G router...

See my reply to this post http://forum.tp-link.com/showthread.php?2316-Configure-routing-on-R470T

It will actually *not* work if you pick the link backup option. Link backup means that only one connection is in online at a time (primary is online until it goes down, then the backup comes online)....

Click Advanced > Load Balance > Policy Routing Protocol: All Protocols Source IP: (ie: 192.168.1.101-192.168.1.101) Destination IP: 0.0.0.0-0.0.0.0 (meaning all) WAN: (ie: WAN2) Click Add This will...