int lo
  ip address 10.1.1.1/32
  ip address 10:1::1:1/128

int eth0
  ip address 10.1.2.1/24
  ipv6 address 10:1::2:1/120

ip route 10.1.1.2/32 10.1.2.2
ip route 10.1.1.3/32 10.1.2.2
ip route 10.1.3.0/24 10.1.2.2
ipv6 route 10:1::1:2/128 10:1::2:2
ipv6 route 10:1::1:3/128 10:1::2:2
ipv6 route 10:1::3:0/90 10:1::2:2