OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:82:ba:ae:7a:87:f4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:ae:f3:70
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:6e:9d:e1:77:de:5a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ae:11:8b:98:89:06
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:ae:f3:70
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
