OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:5b:1a:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:7e:63:f3:b5:e7:4a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:b2:64:eb:50:8d:fc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:12:22:02:11:a7:5a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:5b:1a:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
