OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:36:13:11:26:7a:f2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:8a:b8:aa:16:d0:9d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:da:96:5f:71:21:1a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:e3:2b:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:e3:2b:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
