ip forwarding
ipv6 forwarding

int eth-dummy
 ip addr 172.16.5.5/24
 ip addr fd00:500::5/64

int eth-rr
 ip addr 192.168.3.5/24
 ipv6 address fd00:0:3::5/64

int lo
 ip addr 10.5.5.5/32
 ipv6 address 2001:db8::5/128