OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:42:e7:f4:14:e7:84
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:62:7f:70:29:0d:eb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:8a:0d:62:08:8b:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:23:d6:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:23:d6:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
