OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:9e:65:cc:53:77:7d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:09:f3:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:ca:b9:5e:cd:1d:af
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:3a:80:65:bb:7e:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:09:f3:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
