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?