Do all fibre connections use PPPoE diallers or only some of them?
On FibreX I used DHCP over Tagged Vlan 10 (3rd party router)
On fibre (non vodafone) I needed to use PPPoE on tagged Vlan 10 (3rd party router)
I'm not sure if that makes a difference?
Depends on the ISP.
Some do DHCP, some do PPPoE, some do both.
Same with VLAN, some do tagged, some do untagged, some both.