OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:3c:e0:db
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:ae:1b:15:f1:d0:74
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:7a:a1:d6:1d:c8:06
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:5e:ca:3f:b4:44:63
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:3c:e0:db
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
