Again, thank you for replying, hanging in there on this with me.
Yes, PPPoE is working fine. It is installed on an older Zyxel c3000z router that comes by default with Centurylink DSL service. I switched out routers and PPPoE continued to work fine. So yes, PPPoE is working on other devices.
No, there is no other device in front of the router. It is only connected to the modem which maintains the DSL connection.
I have tried several Vlan numbers based on information I have found serching. And I did find the same link you posted to check out. So thank you on that. I have not tried Vlan 1 yet per that reference, but will shortly.
And yes, I have tried leaving the Vlan value blank as well. No go. If anyone has more ideas on how to pursue this, it would be much appreciated. I continue to research. This is my first experience of PPPoE…