OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:be:e4:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:86:39:3a:6e:d4:d8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:2e:19:05:cd:15:24
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:a6:1f:a7:72:4d:78
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:be:e4:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
