OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:68:48:33
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:2e:e1:93:3c:2d:ae
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:8e:86:46:af:10:19
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:be:be:72:e4:ee:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:68:48:33
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
