OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:aa:c2:3f:d5:30:ab
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:46:b9:4f:1c:a0:f6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:26:1c:cc:1f:24:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:25:ae:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:25:ae:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
