ip forwarding
ipv6 forwarding
!
interface lo
 ip address 10.254.254.4/32
!
interface r4-eth0
 ip address 192.168.3.1/24
 ipv6 address 2001:db8:3::1/64
!
interface r4-eth1
 ip address 192.168.4.1/24
 ipv6 address 2001:db8:4::1/64
!