OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:2e:38:c0:b1:0b:db
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:d2:0c:71:a0:91:53
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:a6:37:73:73:57:0c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:cb:38:4c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:cb:38:4c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
