I'm running 21.03.3 on a r7800, reset to the factory default config (with the exception of Wifi enabled).
My WAN connection is provided by a Huawei CPE Pro 2 5G router connected by ethernet to the r7800's WAN port. The Huawei is setup in bridge mode, looks to be passing the external ip/dns etc. to the r7800 for ipv4 and ipv4 works fine.
I'm struggling to get ipv6 working though.
So the r7800 reports the following for the IPv6 upstream connection. I'm getting a /64 address assigned and local-link addresses for the Gateway and DNS servers.
Of all my wireless clients, only one of the Windows 10 laptops shows as having a DHCPv6 lease. All other clients are assigned DHCPv4 leases.
I can't ipv6 ping / traceroute from the router (get network unreachable). I also can't ipv6 ping from the Windows laptop.
I'm looking to get dual stack ipv4/v6 working if possible. Where do I start with identifying whether the cause of the problem is the ipv6 WAN connection provided by Three or my config?