OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:51:51:86
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:c2:38:82:b6:70:43
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:0a:b0:64:e2:ff:cd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:8a:8e:16:b5:29:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:51:51:86
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
