OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:46:bf:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:46:f0:84:fb:8d:4d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:1a:9e:5e:0a:fc:9f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:fa:00:14:93:94:e7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:46:bf:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
