ip forwarding
ipv6 forwarding

int eth-dummy
 ip addr 172.16.1.1/24
 ip addr fd00:100::1/64

int eth-sw
 ip addr 192.168.2.1/24
 ipv6 address fd00:0:2::1/64

int lo
 ip addr 10.1.1.1/32
 ipv6 address 2001:db8::1/128