hostname r3 interface r3-eth0 ip address 10.0.20.1/24 ipv6 address 2001:db8:1:1::1/64 ! interface r3-eth1 ip address 10.0.10.2/24 ipv6 address 2001:db8:2:1::2/64 ! interface lo ip address 10.254.0.3/32 ipv6 address 2001:db8:F::3/128 !