1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 
    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: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether d4:be:d9:70:ea:3b brd ff:ff:ff:ff:ff:ff
3: wwan0: <BROADCAST,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether ce:5d:eb:fa:fc:d5 brd ff:ff:ff:ff:ff:ff
4: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 60:67:20:7b:16:80 brd ff:ff:ff:ff:ff:ff
    inet 10.20.206.79/16 brd 10.20.255.255 scope global wlan0
       valid_lft forever preferred_lft forever
    inet6 2001:14b8:201:20:fc3a:81fe:c32e:7c11/64 scope global temporary dynamic 
       valid_lft 603499sec preferred_lft 84499sec
    inet6 2001:14b8:201:20:6267:20ff:fe7b:1680/64 scope global dynamic 
       valid_lft 2591998sec preferred_lft 604798sec
    inet6 fe80::6267:20ff:fe7b:1680/64 scope link 
       valid_lft forever preferred_lft forever