OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:d8:f9:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:d6:8f:12:c7:43:c1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:0a:46:06:3a:b1:a5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:fe:4c:4e:bb:5e:eb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:d8:f9:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
