实验4：开源控制器实践——OpenDaylight

（一）基本要求

1.利用Mininet平台搭建下图所示网络拓扑，并连接OpenDaylight控制器；

使用postman清除旧流

通过Postman工具调用OpenDaylight提供的API下发流表，实现拓扑内主机h1和h3网络中断10s

代码如下：

{
    "flow": [
        {
            "id": "1",
            "match": {
                "in-port": "1",
                "ethernet-match": {
                    "ethernet-type": {
                        "type": "0x0800"
                    }
                },
                "ipv4-destination": "10.0.0.3/32"
            },
            "instructions": {
                "instruction": [
                    {
                        "order": "0",
                        "apply-actions": {
                            "action": [
                                {
                                    "order": "0",
                                    "drop-action": {}
                                }
                            ]
                        }
                    }
                ]
            },
            "flow-name": "flow1",
            "priority": "65535",
            "hard-timeout": "10",
            "cookie": "2",
            "table_id": "0"
        }
    ]
}