OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ee:14:05:81:75:e0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:ae:d0:1d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:9e:5e:22:ff:2c:bf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:2e:4f:76:24:a0:b8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ae:d0:1d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
