OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:4e:f8:81:ed:c0:68
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:d6:98:40:f7:09:d3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:9a:fe:e4:de:fe:5c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:7e:b6:07
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:7e:b6:07
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
