OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:7f:7e:73
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:92:eb:ae:24:a5:70
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:0e:75:13:15:aa:af
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:82:59:ae:3a:a7:f3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:7f:7e:73
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
