OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:3a:36:c7:94:02:99
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:0e:d1:d6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:b2:d3:b5:a1:1a:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:a2:2c:c4:85:8a:8e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:0e:d1:d6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
