OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:8e:b9:0d:99:0a:c3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:70:87:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:d2:90:a7:53:6a:6d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:be:07:85:3b:5c:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:70:87:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
