OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:1a:1b:6e:71:53:a1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:f0:45:9d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:f6:03:7b:e6:21:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:56:b5:07:9e:70:33
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:f0:45:9d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
