OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:72:d7:a2:d5:c7:ce
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:52:65:6c:6b:b1:a7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(enp1s0): addr:52:54:00:82:7f:98
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan22): addr:66:f9:dc:3c:96:d0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:82:7f:98
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
