Thank You for the detailed guide. I successfully ran it for a year using. 1. BSNL connection. 2. Wired iBall modem ADSL2. 3. LAN from modem to 2750U LAN4. 4. Perfectly working as an ethernet router using IP over Ethernet. I entered my id pass in iBall modem and gave the internet connection to Dlink by LAN port. This setup was working for a year or so. Now I discarded the iBall modem and bought TP-Link 8968 modem. I entered id pass in TPlink and fed it to Dlink using LAN to LAN4. As i made no changes to Dlink, i am not getting internet access. Same setup and i always used to get internet access by iBall modem. I know i am using BSNL and still getting internet using IP over ethernet as id pass is entered in main modem and not in Dlink. Can anyone guide me why my TPlink and Dlink combo is not working?anything I am missing? I have 2 units of 2750U and it doesnt work with it also.