text: """
  This is sample config file for start_topo.py.
  Please rename to topo.`hostname`.py before use.
  """
  def createTopo():
    return {
      "controllers": {
          "onosdev1" : "192.168.56.11:6633",
          "onosdev2" : "192.168.56.12:6633"
      },
      "switches": {
          # Note that dpid is optional.
          # If omitted, sequential number will be assigned.
          "sw01": { "dpid": "0000000000000101", "controllers": [ "onosdev1" ] },
          "sw02": { "dpid": "0000000000000102", "controllers": [ "onosdev1" ] },
          "sw03": { "dpid": "0000000000000103", "controllers": [ "onosdev1" ] },
          "sw04": { "dpid": "0000000000000104", "controllers": [ "onosdev2" ] },
          "sw05": { "dpid": "0000000000000105", "controllers": [ "onosdev2", "onosdev1" ] }
      },
      "hosts": {
          # Only default interface is configurable for now.
          # mac and ip are optional and automatically assigned if omitted.
          # To avoid collision of address, do not mix specified hosts and omitted hosts.
          "h01": { "mac": "00:00:00:00:01:01", "ip": "10.0.0.1" },
          "h02": { "mac": "00:00:00:00:02:02", "ip": "10.0.0.2" },
          "h03": { "mac": "00:00:00:00:03:03", "ip": "10.0.0.3" },
          "h04": { "mac": "00:00:00:00:04:04", "ip": "10.0.0.4" },
          "h05": { "mac": "00:00:00:00:05:05", "ip": "10.0.0.5" }
  #         "h01": {},
  #         "h02": {},
  #         "h03": {},
  #         "h04": {},
  #         "h05": {}
      },
      "links": [
          # Note that multiple links between nodes are unsupported (if declared, single link will be created).
          {
              "node1": "sw01",
              "node2": "sw02"
          },{
              "node1": "sw02",
              "node2": "sw03"
          },{
              "node1": "sw03",
              "node2": "sw04"
          },{
              "node1": "sw04",
              "node2": "sw05"
          },{
              "node1": "sw05",
              "node2": "sw01"
          },{
              "node1": "h01",
              "node2": "sw01"
          },{
              "node1": "h02",
              "node2": "sw02"
          },{
              "node1": "h03",
              "node2": "sw03"
          },{
              "node1": "h04",
              "node2": "sw04"
          },{
              "node1": "h05",
              "node2": "sw05"
          }
      ]
  }