Never mind.
I found out what I need is to change WAN Connection Type.
My ISP will require PPPoE authentication so I went into IP Config/WAN to set my name/passwd but I'm unsure what Authentication method select.
There are three options: 802.1x MD5, ISP KabiNET, ISP Convex.
Could someone explain what it means and what is the difference between one and other?
I'm on 1.9.2.7-rtn-r4752 (wl500gpv2)
Never mind.
I found out what I need is to change WAN Connection Type.