OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:8e:59:e1:5d:bb:f0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:fc:bd:18
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:6e:ac:28:25:5f:b4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:9e:66:f2:9c:d2:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:fc:bd:18
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
