OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:d2:20:ed:45:f8:15
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:f1:89:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:12:1d:85:67:41:b9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:c2:34:6d:5a:19:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:f1:89:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
