OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:42:9f:79:ee:d4:6c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:be:46:21
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:86:1a:9a:77:9e:24
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:56:92:59:d0:58:8a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:be:46:21
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
