OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:1a:ad:a3:78:80:18
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:86:1e:9a:48:25:93
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:56:eb:43:39:b6:9d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:a1:70:bc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:a1:70:bc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
