OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:d4:1a:4c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:1e:a3:52:16:c9:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:62:c6:d1:91:7e:f7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan22): addr:da:b2:aa:24:d3:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:d4:1a:4c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
