OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:e4:2e:66
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:6e:d4:ee:f5:32:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:36:1d:84:b0:b0:d6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:d6:21:90:a9:85:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:e4:2e:66
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
