Going crazy with this config...

Hi,

I'm trying to bridge my DSL modem to my main router with Asuswrt Merlin. I come from Tomato and everything worked fine but... with the new firmware I'm getting a lot of problems and I'm almost sure that is a cabling problem.

I have the modem/router with the RJ11 connector and 4 100Mb LAN ports.
I go from the modem/router to my main router through a Dlink switch with 8 LAN ports of 1Gb.

I connect my modem LAN port 1 with the LAN port 1 of my switch and from the LAN port 8 of my swith I...

Going crazy with this config...