OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:b6:52:de:b4:15:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:4e:49:2f:8f:ce:7b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:a6:98:2c:9d:ad:29
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:6e:dc:b0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:6e:dc:b0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
