OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:e2:83:26:e3:eb:33
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:3f:79:2e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:1e:e0:76:66:58:f0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:2e:bc:da:83:82:37
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:3f:79:2e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
