OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:66:53:15:eb:6c:00
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:e6:5f:1a:e9:8b:14
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:66:b5:84:0b:6f:c1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:0f:00:52
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:0f:00:52
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
