OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:9a:66:ad:32:9d:71
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:ad:44:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:b2:7a:21:e3:db:4f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:4a:5e:93:6a:e2:1c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ad:44:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
