OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:e6:df:97:67:2d:de
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:de:a0:5c:f4:18:5f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:2e:30:3f:c1:f2:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:7b:86:c0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:7b:86:c0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
