OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:aa:73:f0:6d:f3:8b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:72:cb:ab
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:6a:ee:e4:36:12:d0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:4e:60:56:e2:d4:f9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:72:cb:ab
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
