OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:5e:de:a0:d9:0f:d2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:3d:86:a6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:12:b8:55:00:4a:e7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:0e:94:1b:84:83:f6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:3d:86:a6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
