OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:b2:0a:38:3b:ba:22
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:3f:60:01
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:7e:43:0a:c2:11:43
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:f2:ab:e4:2f:ae:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:3f:60:01
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
