OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:f6:61:51:62:d6:79
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:72:0a:4d:a7:6c:80
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:56:ce:49:af:8e:fa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:c4:4a:3c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:c4:4a:3c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
