OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:42:da:24:94:e7:d5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:c6:b3:06:1d:85:63
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:d6:d8:73:ef:61:e0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:eb:db:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:eb:db:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
