OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:67:0d:db
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:06:fb:f9:e5:f3:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:c2:b4:c1:8a:4e:05
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:0a:b8:cf:e1:58:ec
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:67:0d:db
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
