OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ca:d1:a0:2d:4f:8a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:f2:5f:d2:d4:37:13
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:7e:92:9f:bb:2f:06
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:9f:22:89
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:9f:22:89
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
