# The primary network interface
allow-hotplug ens3
iface ens3 inet dhcp

post-up ip route replace default via 192.168.1.254

# The ipv6 network interface

allow-hotplug ens8
iface ens8 inet6 static
    address 2a01:4f8:222:664::42/128
    # gateway: address="$(ip -j link show dev ens8 | jq -r '.[] | .address[9:] | gsub(":";"")')"; echo "fe80::fc54:ff:fe${address:0:2}:${address:2:4}"
    gateway fe80::fc54:ff:fec3:d645
    post-up ip -6 address add 2a01:4f8:222:6a1::42/128 dev ens8