OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:f9:b8:8e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:fe:31:5f:3c:e2:ca
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:fe:61:79:56:cb:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:f6:c4:9e:c2:61:30
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:f9:b8:8e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
