OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:5f:df:fc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:12:c8:55:29:d1:b0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:62:89:38:3d:d7:dd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:e6:ed:cd:0b:c1:a6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:5f:df:fc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
