OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:1a:7a:8e:8c:dd:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:55:50:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:26:2f:56:7a:91:93
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:86:eb:25:d6:b9:3e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:55:50:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
