OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:c5:e3:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:d6:29:1e:06:cb:0a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:82:9f:b1:a8:22:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:2a:bb:64:59:ff:24
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:c5:e3:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
