OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:72:2e:6a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:62:69:8b:8a:63:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:ae:8e:af:64:01:6c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan22): addr:92:01:e9:be:3f:3a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:72:2e:6a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
