OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:67:a4:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:12:83:a7:76:2f:9d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:ce:22:93:d9:fe:22
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:9e:b1:20:bf:53:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:67:a4:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
