OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:1e:a7:fb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:0a:ff:51:49:0e:9d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:92:8c:37:68:f0:a1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:c2:0c:27:26:b9:f4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:1e:a7:fb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
