OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:19:f1:cc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:22:db:b4:7e:ab:e6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:8e:4b:62:60:1f:b0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:4e:07:e8:60:a4:f4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:19:f1:cc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
