OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:6e:71:2d:ed:4e:23
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:0c:34:8e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:3a:7c:56:0b:63:ac
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:ca:3b:fb:8c:9c:41
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:0c:34:8e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
