PR https://github.com/vyos/vyos-1x/pull/981
vyos@r4-1.3# set interfaces ethernet eth0 ipv6 address eui64 2001:db8::/64
[edit]
vyos@r4-1.3# commit
ru[edit]
vyos@r4-1.3# run show int
Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
Interface IP Address S/L Description
--------- ---------- --- -----------
eth0 192.168.122.14/24 u/u
2001:db8::5054:ff:fe5d:4609/64