OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:e8:5a:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:f2:fa:51:e3:ea:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:36:ac:6d:f6:9e:5b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:06:e3:92:46:3a:3e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:e8:5a:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
