Beam cable Router IP?


Nov 6, 2011
I have the 10 mbps beam connection and it works blazing fast.What is don't like is the terrible wifi router they gave me, I took beam's WIFI PLUS router. I recently tried to connect to Xbox live using wired connection. It seems the MTU is insufficient(Same with wifi connection). I tried to connect to the "default gateway" or router IP. I tried :-
and i used ipconfig /all and found my default gateway and tried that but nothing.

what is the default gateway or how can you change the MTU for a device(Xbox 360) through
Beam Cable's WiFi plus router?