OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:a3:d2:a9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:f2:7a:69:a0:a7:08
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:76:f4:f2:e7:4f:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:8a:ca:c1:70:67:e8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:a3:d2:a9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
