OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:1a:26:f0:87:96:ae
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:df:8b:99
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:b6:fd:d8:7a:27:fe
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:36:6d:85:2c:74:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:df:8b:99
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
