OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:ef:1d:26
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:e2:ad:04:d9:a6:90
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:06:d4:33:c9:11:06
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:3e:8a:93:1e:f9:7f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ef:1d:26
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
