OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:42:aa:6a:00:b8:f1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:a2:3d:47:e0:85:ac
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:ce:0d:2b:98:06:bc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:00:b4:56
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:00:b4:56
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
