OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:4b:e0:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:82:1b:7a:ca:ae:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:de:cb:85:11:10:4c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:5a:2a:b2:1d:41:1b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:4b:e0:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
