OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:cf:ec:eb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:0a:98:7d:f7:f6:81
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:0a:25:4f:24:48:43
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:e2:13:11:e4:dc:67
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:cf:ec:eb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
