OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:62:44:01:85:3e:52
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:6a:09:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:2a:23:b8:2a:8d:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:0e:41:7a:13:9c:0b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:6a:09:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
