OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:42:40:5d:8f:63:c0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:22:98:43
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:66:92:81:e3:ff:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:de:a6:68:0c:de:f4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:22:98:43
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
