OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:82:ae:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:16:a5:22:91:3d:9e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:3a:30:d2:80:3f:43
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:1e:b2:45:2e:8e:ed
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:82:ae:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
