OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:86:84:54:a4:19:c1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:0a:b1:cd:af:63:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ee:41:75:16:9e:af
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:14:76:48
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:14:76:48
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
