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Linux IP

ping -i 0.01 10.0.0.2

On PC A:

sudo ip addr add 192.168.10.1/24 dev eth0
sudo ip link set eth0 up

On PC B:

sudo ip addr add 192.168.10.2/24 dev eth0
sudo ip link set eth0 up

Test:

ping 192.168.10.2

Mininet NAT​

forward:

sudo sysctl -w net.ipv4.ip_forward=1
sudo ip route add 10.0.2.0/24 dev s1-eth1
ip route get 10.0.2.2

confim:

sudo ip addr add 10.0.2.254/24 dev s1-eth1

nat:

sudo iptables -t nat -A POSTROUTING -s 10.0.2.0/24 -o wlp4s0 -j MASQUERADE
sudo iptables -A FORWARD -i wlp4s0 -o s1-eth1 -j ACCEPT
sudo iptables -A FORWARD -o wlp4s0 -i s1-eth1 -j ACCEPT