OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:ff:30:ef
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:ae:35:41:11:e8:1e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:16:82:75:7f:3e:7c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:8a:53:8b:2a:2b:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:ff:30:ef
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
