OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:26:9d:37:f6:83:38
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:48:c6:f7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:3e:51:46:f8:97:51
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:b2:7c:cf:6c:fd:34
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:48:c6:f7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
