OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:56:6b:1a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:8e:2c:56:fe:8f:a6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:6a:a2:db:8f:33:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:26:3f:a0:0e:f6:2b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:56:6b:1a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
