OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:9d:82:41
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:ba:b7:e3:50:3d:9f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:fa:8c:b5:44:81:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:9e:fa:49:32:55:b2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:9d:82:41
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
