OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:e9:af:d8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:be:37:8d:49:63:bd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:2e:85:a0:34:6f:54
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:22:fb:72:62:6a:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:e9:af:d8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
