OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:96:da:7b:2f:e5:a9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:9e:b9:1d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:06:a6:7a:f7:60:5c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:d2:b7:05:52:46:e2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:9e:b9:1d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
