OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:8a:c8:10:07:5a:53
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:2a:b2:2f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:62:c2:94:a8:6d:87
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:c2:c1:83:76:61:e7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:2a:b2:2f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
