OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:c4:66:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:86:7e:77:7f:77:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:ae:81:fc:69:21:53
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:6e:a7:ae:ce:07:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:c4:66:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
