auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp
    post-up route add -host 169.254.42.42/32 gw 62.210.0.1 | true
    pre-down route del -host 169.254.42.42/32 gw 62.210.0.1 | true
    post-up route add -A inet6 default gw fe80::dc00:ff:fe20:186 | true
    pre-down route del -A inet6 default gw fe80::dc00:ff:fe20:186 | true

# control-alias eth0
iface eth0 inet6 static
    address 2001:bc8:1210:232:dc00:ff:fe20:185/64