OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:f6:b4:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:1a:fd:53:67:bf:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:d2:be:30:97:68:ef
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:02:be:b1:22:5e:c7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:f6:b4:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
