OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:86:50:7d:eb:8d:f4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:6e:4e:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:72:92:e2:dd:80:fb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:6a:84:a0:1c:23:4a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:6e:4e:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
