OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:26:97:09:a1:dc:80
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:0a:a7:93:40:a7:70
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:8e:05:2f:b2:cc:11
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:2f:c6:ab
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:2f:c6:ab
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
