OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:9a:1f:aa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:8a:4a:85:a9:25:ed
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:36:a1:9b:c0:8c:e7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:e6:2e:53:13:4a:72
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:9a:1f:aa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
