OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:c6:ec:3d:10:97:c8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:06:2d:96:8f:ac:6c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(enp1s0): addr:52:54:00:b9:e5:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan22): addr:46:02:4b:b4:e3:a4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:b9:e5:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
