OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:06:28:61:0e:ce:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:61:7e:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:82:85:95:3e:9d:b7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:a2:d3:52:26:82:c3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:61:7e:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
