OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:8c:87:c8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:aa:89:26:52:8c:19
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:2e:50:60:f3:9d:a3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:9e:93:1a:3d:01:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:8c:87:c8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
