Hi,
I am running Version: VyOS 1.2.0-rolling+201908030337
And the Kernel seems to support GRE over IPv6:
:~$ grep -H CONFIG_IPV6_GRE /boot/config-uname -r
/boot/config-4.19.54-amd64-vyos:CONFIG_IPV6_GRE=m
However when trying to set encapsulation, there is no option for it:
set interfaces tunnel tun666 encapsulation n
Possible completions:
gre Generic Routing Encapsulation gre-bridge Generic Routing Encapsulation bridge interface ipip IP in IP encapsulation sit Simple Internet Transition encapsulation ipip6 IP in IP6 encapsulation ip6ip6 IP6 in IP6 encapsulation
The layout (kernel side command's) seems to be identical as GRE, where the validation should check if the address is a valid IPv6 and not allowing IPv4 addreses