OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:36:e7:31:2e:1a:85
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:b5:43:6f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:8e:4c:c7:8b:21:9b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:fe:3d:46:d1:cc:d5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:b5:43:6f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
