After the introduction of WireGuard on the Vigor2927 router, I have successfully implemented WireGuard LAN-to-LAN connections to other Vigor2927, as well as WireGuard dial-in tunnels to the Vigor2927. This all works fine.
I've also tried to configure a LAN-to-LAN connection from the Vigor2927 to MullVad, so all my internet traffic from the Vigor gets routed to a MullVad WireGuard VPN, but although I succeeded to get a stable tunnel once, nothing got through and all other working tunnels that I've managed to create crashed within minutes.
Before I have had similar set-ups from the Vigor2927 to NordVPN using OpenVPN and IPsec tunnels.
Can anyone tell me how to set-up a WireGuard LAN-to-LAN VPN from a Vigor2927 to MullVad? Both Draytek and MullVad haven't published any papers on this.