OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:32:d4:02:4d:08:09
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:c2:82:7e:70:96:7d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:0a:0d:60:34:97:1d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:c1:68:83
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:c1:68:83
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
