OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:b2:b3:9f:a5:48:30
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:66:a2:b4:a1:97:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:5a:fe:27:ea:26:98
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:fb:a9:df
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:fb:a9:df
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
