OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:56:da:fa:f7:c1:40
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:3e:c8:98:8d:c4:83
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:f6:8e:5b:1b:ba:fa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:3f:e5:2b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:3f:e5:2b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
