OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:46:04:90:ca:15:bb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:22:0b:c2:c7:eb:a3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:2e:79:7b:89:c0:55
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:2d:b4:1d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:2d:b4:1d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
