OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:61:9e:1f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:56:5a:fd:6f:36:2d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:46:1b:aa:31:58:4a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:3a:21:7b:6c:77:21
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:61:9e:1f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
