1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:50:56:8b:70:b7 brd ff:ff:ff:ff:ff:ff
    inet 10.40.1.16/24 brd 10.40.1.255 scope global eth0
    inet6 fe80::250:56ff:fe8b:70b7/64 scope link 
       valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop 
    link/sit 0.0.0.0 brd 0.0.0.0
