OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:26:61:94:3f:94:6b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:f1:cd:cf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:3a:91:7e:32:1d:99
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:ba:f7:ef:67:23:d7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:f1:cd:cf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
