OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:26:1c:96:8e:24:00
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:a6:66:1c:6f:e4:35
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:4e:96:7d:7b:cc:fe
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:4f:eb:11
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:4f:eb:11
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
