OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:4b:23:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:4a:c3:44:c1:11:7b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:96:ea:04:52:a5:93
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:8a:07:d0:25:2d:4c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:4b:23:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
