OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:73:e8:ae
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:8a:a9:11:dd:b7:fa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:96:45:2f:93:09:b0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:8a:60:01:2d:cd:b8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:73:e8:ae
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
