OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:e4:b1:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:02:46:e4:ae:4e:98
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:8a:10:11:2a:a5:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:c6:9b:78:25:87:ac
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:e4:b1:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
