{
  "event": "addLink",
  "payload": {
    "id": "of:0000ffffffffff07/21-of:0000ffffffffff05/20",
    "type": "optical",
    "linkWidth": 2,
    "src": "of:0000ffffffffff07",
    "srcPort": "21",
    "dst": "of:0000ffffffffff05",
    "dstPort": "20",
    "props" : {
      "BW": "70 G"
    }
  }
}