OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:c0:97:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:0a:be:28:83:38:c8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:c6:70:76:e8:17:d9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:16:d3:59:c9:01:d9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:c0:97:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
