I just switched my NBN from Telstra to Spintel.

Telstra is using DHCP while Spintel is using PPPOE. But when I configure the usrename and password for my WAN, USG can’t connect to internet.

Spent lots of time to troubleshot this issue, and then I notice that there is a log on USG

Oct 29 14:49:25 USG pppd[8094]: pppd 2.4.4 started by root, uid 0
Oct 29 14:49:25 USG pppd[8094]: Failed to create PPPoE socket: Protocol not supported
Oct 29 14:49:37 USG xl2tpd[8208]: setsockopt recvref[30]: Protocol not available

Then I realize it’s a driver issue. Looks like USG won’t load PPPOE driver without a restart. So if you are using DHCP in the past, after you change to PPPOE, you need to restart your USG.

After restart USG, all good.