ipv6 setup with a 3rd party router connected to BT FTTP , solved for TP-Link Deco X60

[maguirejohnny]

Hi, there are many threads on this topic, however thought I would post my experience separately rather than pick a random existing thread.

Finally got ipv6 correctly configured to work with setup of-

BT FTTP, Openreach modem, TP-Link Deco X60 router with 2 x satellites.

After several configurations this one has proven to work, having checked the usual ipv6 web browser validation sites such as test-ipv6.ocm;  also my laptop and iphone 13 connetion-

Connection type: PPPoE

Sync IPv4 Account: On

Prefix Delegation: On

DNS Address: Auto

Assigned Type: DHCPv6

Hope this helps someone!

[McGrath1982]

Sorry to jump on this post. But I’m looking at getting these for myself with FF900 and not using the Smart Hub etc. Are you still using them and have you had any issues since posting this. Thanks 

[maguirejohnny]

Hi there, yes I’m still using them and have had zero problems with ipv6 setup since posting. I would certainly recommend them, depending on current price competitiveness.

[McGrath1982]

Thanks for the reply back just ordered them now the 3 pack £220 on Amazon 

[markbebb]

I am trying to set my deco x95 to use IPv6 but no matter what setting I use, it seems to drop the IPv6 address after a few seconds and the Wi-Fi drops at the same time. It’s the strangest thing 

[NJackooo]

I had the same thing with my AX95, make sure PPPOE username is bthomehub@btbroadband.com

Also, I found I had to reboot mine to get it to actually stop glitching out, once the settings were correct.

[NJackooo]

@markbebb 

[markbebb]

Thanks! I'll give it a go 

[beanybaby212]

Felt the need to jump on this thread if you are still active, I'm having similar problems to these here.

I have a pair of deco x20's

I have had an ISP router behind them for years now, changed to EE smart hub not that long ago with my deco's in router mode.

I wanted to remove the smart hub to prevent double NAT'ing myself and found more problems, I didn't even realise my IPv6 wasn't working with smart hub connected and my deco's in Dynamic IP mode. (Haven't tried them in AP mode yet but I will assume for now that it will probably work). I want to keep the deco's router features so AP mode won't help me.

I have them connected now in PPPoE mode with IPv6 disabled and they work perfect, enabling IPv6 causes similar symptoms to above as it just keeps dropping the Wifi every 5-20 seconds and is very unstable when it is connected.

The only method I can seem to have a working IPv6 connection is with the deco's removed and only using the smart hub then all is fine.

EDIT: solved i have tried the setting get address to non address and all working fine!

[Crimliar]

As soon as you "Double NAT", there is nowhere for the secondary router to get an IPv6 delegation from, when using the BT SH2.  Because of this your secondary router cannot assign IPv6 addresses that are addressable from outside of it's own subnet.  You might still get local IPv6 addresses, but nothing really usable.

*Even for most of us with third party routers, we get a /56 delegation, but because the routers only use the first subnet (equivalent) we only really see the equivalent of a /64 delegation with upper most byte being 00H.  You need to be getting into the realms of OpenWRT or RouterOS to see more.  But just think how many devices that would actually be!

**Sits back and waits for a pedant to come in and say "well actually...."!