OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:fe:9e:e9:72:47:22
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:2e:0b:f3:0f:12:ac
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:16:53:e5:fd:16:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:b6:d6:66
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:b6:d6:66
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
