2019 SDN上机第4次作业

1. 解压安装OpenDayLight控制器（本次实验统一使用Beryllium版本）

1.配置java环境

sudo gedit ~/.bashrc

2.解压安装OpenDayLight控制器

2. 启动并安装插件

1.启动

2.安装插件

opendaylight-user@root>feature:install odl-restconf
opendaylight-user@root>feature:install odl-l2switch-switch-ui
opendaylight-user@root>feature:install odl-openflowplugin-all
opendaylight-user@root>feature:install odl-mdsal-apidocs
opendaylight-user@root>feature:install odl-dlux-core
opendaylight-user@root>feature:install odl-dlux-node
opendaylight-user@root>feature:install odl-dlux-yangui

3. 用Python脚本搭建如下拓扑，连接OpenDayLight控制器

1.拓扑结构如下

2.编写拓扑的Python脚本

from mininet.topo import Topo

class Mytopo(Topo):
    def __init__(self):
        Topo.__init__(self)
        sw=self.addSwitch('s1')
        
        h1 = self.addHost('h1')
        h2 = self.addHost('h2')
        h3 = self.addHost('h3')
        
        self.addLink(h1,sw,1,1)
        self.addLink(h2,sw,1,2)
        self.addLink(h3,sw,1,3)

topos = {'mytopo': (lambda:Mytopo())}

3.打开ODL图形化界面

打开浏览器访问http://127.0.0.1:8181/index.html进入ODL图形化界面（以下是启动完成界面）

4.运行

sudo mn --custom sdn4.py --topo mytopo --controller=remote,ip=127.0.0.1,port=6633 --switch ovsk,protocols=OpenFlow13

5.pingall检测连通性，同时在控制器端查看拓扑图

4. 在控制器提供的WEB UI中下发流表使h2 20s内ping不通h3，20s后恢复

1.依次打开：Yang UI>Opendaylight-inventory>config>nodes>table>flow

2.首先使用links查询链路连接情况

3.ODL内部设置：

4.验证h2 ping h3中断20s又恢复

5.具体报文

http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1

{
    "flow": [
        {
            "id": "1",
            "match": {
                "in-port": "2",
                "ethernet-match": {
                    "ethernet-type": {
                        "type": "0x0800"
                    }
                },
                "ipv4-destination": "10.0.0.3/32"
            },
            "instructions": {
                "instruction": [
                    {
                        "order": "0",
                        "apply-actions": {
                            "action": [
                                {
                                    "order": "0",
                                    "drop-action": {}
                                }
                            ]
                        }
                    }
                ]
            },
            "priority": "65535",
            "hard-timeout": "20",
            "table_id": "0"
        }
    ]
}

5. 借助Postman通过OpenDayLight的北向接口下发流表，再利用OpenDayLight北向接口查看已下发的流表。

1.安装Postman

使用命令如下，即可安装成功

sudo tar -xzf Postman-linux-x64-7.11.0.tar.gz
./Postman/Postman

2.使用postman下发流表

3.使用get来调用接口查看流表