OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:45:51:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:fa:5e:c9:ef:63:a8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:4a:67:d4:15:c6:17
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:52:56:62:29:aa:55
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:45:51:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
