I have the OpenWRT firmware flashed to my old Plusnet Hub One. Did this whilst I was at work on a ship. I am now at home and trying to get it actually talking to Plusnet.
I have entered my Plusnet credentials into the Network/Interfaces/WAN page.
I have the ONT connected to the WAN port and the ONT has three green lights on.
I can try and manually connect to the WAN, but it is not working. Looking at the system log, I can see the error message:
IPv6: ADDRCONF(NETDEV_UP): ptm0: link is not ready
But, I am not trying to use IP6, so maybe that's a red herring.
Hopefully someone has a clue. Just one more bit of information. The firmware version is LEDE Reboot 17.01.4r3560-79f57e422d.
Just to state the obvious, these lantiq devices are designed with VDSL 50/10 in mind, yes you can use them for 100/40 MBit/s, but performance is really hard with the back to the wall there (~85 MBit/s without software flow-offloading). If you are on ftth with significantly faster WAN speeds than ~100 MBit/s, you really should look at different/ faster router hardware instead.
I have used the BTHH5 successfully on FTTP upto the 145/30 service with Plusnet.
Follow the excellent installation guide referenced on the wiki page (https://openwrt.org/toh/bt/homehub_v5a) and do not forget to disable/stop/delete entries referencing DSL.
I also disabled the IPv6 stuff to reduce the error messages in the log.
This is my wan config. for FTTP:
Initially I also had a temporary wan connection setup using DHCP protocol (for upgrade/re-configure purposes) but had to disable it, as it would "grab" the port, fail to connect, and not let the PPPOE protocol attempt to connect.
So it seems the main takeaways are that I am using a very old version, so I will try and get that updated. I'll take a look at if it is trying to use the ADSL port as well.
Regarding performance, it should be good enough for just me for the moment. I do have a Firewalla Gold (not OpenWRT) in storage somewhere, but I would need to dig through lots of stuff to get to it and I just don't have time right now.
But thanks for all the pointers, I will let you know how I get on.