OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:c4:bc:f6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:22:73:68:12:6e:22
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:96:c5:6b:ad:70:74
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:7e:49:35:04:d9:10
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:c4:bc:f6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
