OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:d4:ac:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:5a:02:7c:2a:2a:ab
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:6e:42:5d:b5:e6:99
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:da:f1:7a:96:ac:09
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:d4:ac:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
