OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:6a:4a:8e:20:1d:e1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:5c:14:d0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:4a:f4:a3:81:d1:f9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:4e:eb:81:a0:23:12
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:5c:14:d0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
