OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:76:5c:e4:24:b2:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:5f:98:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:22:de:57:ab:b3:12
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:6a:4d:9b:c8:58:cf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:5f:98:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
