ASUS GT-AC5300 won't connect to WAN after DSL upgrade from ADSL2+ to VDSL2

[CHaynes112]

Router - ASUS GT-AC5300
ISP - Frontier
ISP Gateway - Arris NVG448BQ (Transparent Bridging)
Service Type - VDSL2 PPPoE PAP

I just had my service upgraded from ADSL2+ to VDSL2. When using the Frontier provided gateway as a router, everything works fine. However, when I put it in bridge mode and attempt to use the ASUS as a router, it will not connect to the WAN. This was working perfectly before I was upgraded to VDSL. Does anyone have any suggestions?

Thanks

 

[drabisan]

WAN MTU?

 

[CHaynes112]

I have it set to 1492. That's what it was on for ADSL2+. That's also the value the ISP modem gets when it's set to Auto.

The workaround for now is using DMZ/IP-Passthrough to my router.

 

[CHaynes112]

I got it working. VDSL2 requires VLAN tagging. I had to set the WAN VID to 101 for my ISP (Frontier).