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

[WSH]

Well actually,  I'm running a Draytek through the SH2 and it works fine set up as a DHCPv6 client.

(Not sure if that's pedantic or not...ha ha ha).

[Crimliar]

The Draytek will run as an client with a global IPv6 address, but is it passing on, or generating global IPv6 addresses (primary or secondary IPv6 "subnet"?) for clients?  If so then the SH2 is more capable than I was aware!

[WSH]

Yes, in fact my Windows 11 machines seem to have switched to using IPv6 as their primary address.  I was investigating something the other day and it turned out IPv4 had turned off.  Be interesting to know how that happened, as I didn't do it.

I’ll risk being even more pedantic and say that I’ve also found the IPv6 prefix to be very stable over the past two years.  It doesn’t change for a routine reboot and the SH2 has to be off for a long time for it to get a new prefix.  Crude as it might be, I reckon one solution would be to just copy it and put it into the Draytek or whatever manually and then updating it as necessary.  It is capable of entering a manually set prefix.  Be interesting to see if that would work sometime.

[WSH]

To expand a bit more on the previous for anyone interested…the SH2 has DHCPv6 enabled stateless, the Draytek, set as DHCPv6 Client, then picks up an address for itself from that and then uses it to generate the router advertisement for the rest of my network.  Seems to work very well.

[Crimliar]

Not what I'd expect!  Can probably put this down to cleverness on the part of Draytek (pass thru mode?), rather the BT router doing things above and beyond the call of duty!  Interestingly, at least according to the IpFoo extension, most of my connections on the laptops here are currently IPv6.

[WSH]

Yes, that reminds me, there is a bridge to LAN1 setting on the Draytek.  What's really nice is that there is also a tick box to make sure it still goes through the firewall as well.

Edit: Sorry, ambiguous there.  "goes through" as in enable firewall.

[WSH]

This is a picture from Draytek's interface demo rather than my actual router but it's set up like: