OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:a5:df:91
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:be:6d:fd:7a:75:98
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:d2:dd:55:68:fd:1e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:a6:e7:16:c0:34:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:a5:df:91
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
