{
  "node": [
    {
      "node-id": "openflow:1",
      "node-type": "switch",
      "attribute": [
        {
          "name": "location",
          "value": "openflow:1"
        }
      ],
      "port": [
        {
          "port-id": "openflow:1:1",
          "port-type": "external",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:1:1"
            }
          ]
        },
        {
          "port-id": "openflow:1:2",
          "port-type": "external",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:1:2"
            }
          ]
        },
        {
          "port-id": "openflow:1:3",
          "port-type": "internal",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:1:3"
            }
          ]
        }
      ]
    },
    {
      "node-id": "openflow:2",
      "node-type": "switch",
      "attribute": [
        {
          "name": "location",
          "value": "openflow:2"
        }
      ],
      "port": [
        {
          "port-id": "openflow:2:1",
          "port-type": "external",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:2:1"
            }
          ]
        },
        {
          "port-id": "openflow:2:2",
          "port-type": "external",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:2:2"
            }
          ]
        },
        {
          "port-id": "openflow:2:3",
          "port-type": "internal",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:2:3"
            }
          ]
        }
      ]
    },
    {
      "node-id": "openflow:3",
      "node-type": "router",
      "attribute": [
        {
          "name": "location",
          "value": "openflow:3"
        }
      ],
      "port": [
        {
          "port-id": "openflow:3:1",
          "port-type": "internal",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:3:1"
            }
          ]
        },
        {
          "port-id": "openflow:3:2",
          "port-type": "internal",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:3:2"
            }
          ]
        },
        {
          "port-id": "openflow:3:3",
          "port-type": "internal",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:3:3"
            }
          ]
        },
        {
          "port-id": "openflow:3:4",
          "port-type": "external",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:3:4"
            }
          ]
        }
      ]
    },
    {
      "node-id": "openflow:4",
      "node-type": "router",
      "attribute": [
        {
          "name": "location",
          "value": "openflow:4"
        }
      ],
      "port": [
        {
          "port-id": "openflow:4:1",
          "port-type": "internal",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:4:1"
            }
          ]
        },
        {
          "port-id": "openflow:4:2",
          "port-type": "external",
          "attribute": [
            {
              "name": "location",
              "value": "openflow:4:2"
            }
          ]
        }
      ]
    }
  ]
}