dns_21: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 198.21.0.1  netmask 255.255.255.0  broadcast 198.21.0.255
        inet6 fe80::dcec:c7ff:fe2d:4096  prefixlen 64  scopeid 0x20<link>
        ether de:ec:c7:2d:40:96  txqueuelen 1000  (Ethernet)
        RX packets 15  bytes 1146 (1.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 225  bytes 17654 (17.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0