1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:5d:9e:29:5a brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
21: eth0@if22: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UP group default qlen 1000
    link/ether 00:16:3e:cc:3d:e0 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 252.49.162.4/8 metric 100 brd 252.255.255.255 scope global dynamic eth0
       valid_lft 2358sec preferred_lft 2358sec
    inet6 fe80::216:3eff:fecc:3de0/64 scope link 
       valid_lft forever preferred_lft forever