This is actually about the ARCHER VR900 v2!!! The above will not let me select the correct version.
[ MODEM / DSL ROUTER, Archer VR900 v2 ]
I am trying to get IPv6 working on an Archer VR900 using the WAN interface. It previously worked just fine on the DSL interface.
The settings for my internet provider (zen internet: firstname.lastname@example.org) are SLAAC, RADVD, delegated. This worked fine on DSL. When the router is plugged in from the WAN interface (for my new fibre connection) and I select SLAAC, RADVD, delegated, I get an IPv6 DNS but the gateway is blank and I also now have no IP as it obviously cannot delegate addresses from anything. I have confirmed that the ISPs radius server is working ok and have sucessfully got a Fritzbox 7530 router working in IPv6 with exactly the same settings as above.
So, I am convinced you have an IPv6 BUG in the firmware for the WAN interface.
Please note, I have of course selected the correct settings in the LAN interface as well as WAN.
I have used the routers interface to check for updated firmware, but it says there is none. I am running the same firmware it shipped with.
Thanks for your help,