OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:d6:57:cb:ad:43:53
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:74:61:85
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:b6:0f:cb:17:9d:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:72:bc:aa:c8:49:e1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:74:61:85
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
