OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:35:cb:2e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:fe:36:18:57:ab:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:9a:a0:00:19:d8:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:d6:93:92:3b:86:7d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:35:cb:2e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
