OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:9e:1e:ef:f5:fe:d1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:9e:a8:08:db:f3:f8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:7a:d8:1a:3a:8d:14
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:22:83:70
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:22:83:70
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
