Can anyone help with appropriate settings for ipv6? Unlike the previous iteration of the router (AC-68U) this one doesn’t give any options to change the lan prefix length to coordinate with BT as /56 rather than /64 I have it set in native mode and have tried messing around with the other settings (eg Static Ip) to no avail.
I fought with IPv6 on this router for months and in the end I gave up – it simply doesn’t work on BT Openreach services, either with the built in modem or an external Openreach one.
Oddly enough, I also have a Billion 8900AX-1600 R2 which has the same chipset and the same IPv6 issues… 
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