OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:e6:a7:f7:84:42:3c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:06:b1:f8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:9e:20:b7:89:c8:ed
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:86:54:c4:38:d2:4c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:06:b1:f8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
