I have a fiber internet connection going into a Tomato router (Shibby's variant). The setup is simple: fiber going into a media converter, and from there Ethernet into the WAN port of the Tomato router (Linksys EA6900). The ISP (Bell Canada) requires the WAN to be tagged on VLAN 35. The WAN connection is PPPoE. This router works as expected. I am trying to add a second router to the mix because I need two public IP addresses. The ISP allows 3 PPPoE sessions, so that's not an issue. The second router is a Linksys EA2500, also flashed with Shibby's build. One way to do this would be to add a switch between the media converter and the WAN ports of the two routers, but I am trying to avoid adding that. So I am trying to connect it to the main router through just one Ethernet cable, with both the WAN and the LAN going through it. So I tried to make one of the LAN ports on the main router part of both VLANs, and connect it to the WAN port of the second router which is also part of both VLANs. See the attached photo. I tried in one case to have both VLANs tagged (on both routers) and in another case to have the WAN VLAN tagged and the LAN one untagged. In both cases the LAN connection works (the routers can ping each other) but the WAN on the second router is not able to establish a PPPoE connections. Any idea what I am doing wrong ?