OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:2a:9e:15:76:d1:11
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:a0:9a:4f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:26:46:59:a3:98:39
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:7e:c3:77:8a:e0:f2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:a0:9a:4f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
