OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:96:03:14:fd:df:aa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:e5:f4:60
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:6a:59:76:f0:2c:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:76:06:9c:90:10:fc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:e5:f4:60
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
