OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:80:b1:7b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:be:a3:e1:70:eb:4b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:0e:b6:e8:06:33:c1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:de:2d:e9:12:eb:51
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:80:b1:7b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
