OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:40:41:55
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:aa:3b:0d:2a:e6:4e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:aa:c6:0c:69:d5:a8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:8a:d8:3e:26:c6:f4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:40:41:55
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
