OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:fa:ab:81:4c:6c:96
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:55:eb:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:2a:96:51:27:40:bc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:4e:d7:ed:ea:04:af
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:55:eb:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
