OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:3e:c2:87:33:bc:8e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:f7:fd:da
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:be:f1:f5:72:63:76
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:32:07:78:97:74:98
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:f7:fd:da
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
