OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:b6:2b:e1:b0:32:3c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:6b:91:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:e6:73:bf:be:f5:67
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:de:09:28:ee:d4:fd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:6b:91:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
