OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:86:c5:ce:82:2d:d7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:47:31:a9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:32:a6:98:33:fc:94
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:7e:35:85:c8:cf:df
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:47:31:a9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
