OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:4e:94:0b:fe:3d:24
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:47:da:08
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:62:ca:83:50:e9:a0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:96:b7:ee:bc:11:3e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:47:da:08
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
