IPv6 config – Router cannot ping IPv6 addresses, but clients can

[njb12]

@mikma

If the ipv6 address assigned to the wan6 interface doesn't work then you could try disabling it by setting "Request IPv6-address" to disabled. Then you won't receive any dhcpv6 address but still a prefix via dhcpv6-pd. BTW you don't need a global ipv6 address on wan6, you can receive traffic to any global IPv6 address assigned to an interface on the router.

This turns out to be the solution. Once I disabled the IPv6 address of the wan6 interface, the router became able to ping IPv6 addresses. It appears others have been affected by this issue with my ISP (Hyperoptic in the UK) - e.g. Opkg update fails due to IPV6 running and https://forum.netgate.com/topic/135917/ipv6-setup-with-hyperoptic-uk-isp/10

I was then able to get WireGuard working by pointing peers to the IPv6 address of the router's lan interface.

Thanks to everyone who responded.