OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:0e:e1:3f:7a:ca:52
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:ea:48:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:6e:a9:10:03:b7:cd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:42:6f:16:99:93:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:ea:48:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
