===DHCP===
----
<pre>
$ sudo ip netns add server
$ sudo ip netns add client
$ sudo ip link add s-veth0 type veth peer name c-veth
$ sudo ip link set s-veth0 netns server
$ sudo ip link set c-veth netns client
$ sudo ip netns exec server ip link set s-veth0 up
$ sudo ip netns exec client ip link set c-veth up
$ sudo ip netns exec server ip address add 192.0.2.254/24 dev s-veth0</pre>