OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:76:48:15:5c:5c:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:f3:1c:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:52:6f:aa:ac:2f:d8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:be:b8:78:76:ee:4f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:f3:1c:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
