OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:48:d3:e2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:b2:5d:44:26:d2:d7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:52:7f:da:a7:33:1c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:22:4d:51:e5:b7:95
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:48:d3:e2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
