I already tried to get online for severall hours now..
My situation:
I want to use my TP-Link TL-WR1043ND as a router and my Fritz!Box 2170 as an adsl modem. I have to mention that the FB ran for severall years without problems and same ISP-Login details like now. My ISP uses PPPoE.
I bought an TP-Link TL-WR1043ND and installed the newest Gargoyle firmware by following this guide: Install Gargoyle on TP-Link TL-WR1043ND
Very easy, very successfull.
I reseted my Fritz!Box 2170 and installed the newest AVM firmware (51.04.57). I tried for severall hours and searched this forum: I wasnt able to establish an internet/WAN connection.
I found this guide: Accessing your adsl modem in bridge mode. So I changed to bridge mode, enabled dhcp on the FB gave a static ip 192.168.2.1 to it (router uses 192.168.1.1). Both in 255.255.255.0 subnets.
I wasnt able to understand why I have to enable DHCP on the FB? I'd like to use the TL DHCP if possible.
Hardware and cables are connected like this:
INTERNET -> Fritz!Box (ADSL Modem) -> LAN -> TL-WR1043ND (WAN Port).
This is the config of my TP-Link TL-WR1043ND: