port_DUS: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 21.0.1.1  netmask 255.255.255.0  broadcast 21.0.1.255
        inet6 fe80::5090:83ff:fe7d:141d  prefixlen 64  scopeid 0x20<link>
        ether 52:90:83:7d:14:1d  txqueuelen 1000  (Ethernet)
        RX packets 504  bytes 42388 (41.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 419  bytes 33399 (32.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0