How to use IPoA

Question for the openwrt developpers :
How to use IPoA ?

Following this thread : Modem configuration for ADSL2+

I have a modem TD-W8980A modem (Annex A) and I need this protocol however in luci after installing IPoA this protocol still don't show up, there should be a way to setup IPoA in SSH

My ISP use IPoA for authentification to their network, I need instruction for IPoA setup using SSH


In thw other thread the lik you shared (french) says that ipoa does not use user authentication.
Authentication is achieved by cloning the MAC address of your isp modem or asking your isp to auethenticate your new MAC address