SOME third-party routers fail to get an IP on TalkTalk Fibre

[Christmas themed thank]

I have a very strange issue with TalkTalk fibre.

Using the HG612 in routing mode (i.e. as a modem and router), it gets an IP from TalkTalk using DHCP and the Internet works.

Using a ZyXel VMG8324, sync is acheived but the router cannot get an IP. Different firmwares have been tried, it's setup correctly to request an IP via DHCP but it just doesn't get one.

Using a Billion 8800NL, sync is acheived but the router also cannot get an IP.

The TalkTalk routers (Huawei HG635, Huawei HG633) get an IP.

What is going on?

 

[Ricimer]

Is the VLAN set for the VDSL connection? The HG612 will probably be using VLAN 101 by default

 

[Steveocee]

What if you connect a windows PC and build a PPPoE connection? Does that fail to get an IP?

 

[Christmas themed thank]

Is the VLAN set for the VDSL connection? The HG612 will probably be using VLAN 101 by default

Ah! Yes that does ring a bell.

I can't remember why this is needed though?

 

[Voodle]

Because that's how VDSL works It's like the VPI / VCI stuff for ADSL.

 

[Caged]

https://www.draytek.co.uk/archive/kb/kb_vigor_v2850_setup.html

That's a good "what settings do I need on an Openreach FTTC connection" primer.

 

[KIA]

@Gigabit Did you manage to solve this?

I have the same issue.

 

[Christmas themed thank]

@Gigabit Did you manage to solve this?

I have the same issue.

VLAN must be 101, priority I believe 0, 1 or 2

 

[KIA]

VLAN must be 101, priority I believe 0, 1 or 2

Thanks. I was using VLAN 101 and priority 2. All is well after a factory reset.