OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:ff:1a:ae
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:b6:be:0d:7c:81:a5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:8e:65:c7:0c:87:d7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:7e:1c:1e:f1:01:00
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ff:1a:ae
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
