OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:aa:02:46:d0:9c:d3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:6a:eb:ce:d4:48:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(enp1s0): addr:52:54:00:5e:62:7a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan22): addr:d2:8b:88:be:c9:dd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:5e:62:7a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
