int r1-eth0
  ip address 192.168.1.1/24

int r1-eth1
  ip address 192.168.2.1/24

int r1-eth2
  ip address 192.168.3.1/24

int r1-eth3 vrf vrf-chiyoda
  ip address 192.168.4.1/24

int r1-eth4
  ipv6 address c0ff:ee::/64
