OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:9b:af:c2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:5a:8b:e0:52:24:06
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:b2:4f:d5:17:0d:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:46:5a:d2:e7:d8:f7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:9b:af:c2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
