OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:7e:7f:31:2f:55:46
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:7a:7f:47:96:c7:97
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(enp1s0): addr:52:54:00:3b:51:26
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan22): addr:5e:ae:e3:d5:7d:e3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:3b:51:26
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
