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）JDK的安装与环境配置

​ 嗯，装这个东西还得先装JDK：

​ 在线真人手把手教你安装jdk

​ 输入sudo gedit ~/.bashrc配置环境变量，输入：

export JAVA_HOME=/usr/local/java/jdk1.8.0_201
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

2.启动并安装OpenDayLight

• 终端下执行./.../bin/karaf

• 安装插件

  feature:install odl-restconf
  feature:install odl-l2switch-switch-ui
  feature:install odl-openflowplugin-all
  feature:install odl-mdsal-apidocs
  feature:install odl-dlux-core
  feature:install odl-dlux-node
  feature:install odl-dlux-yangui
  

3.用Python脚本搭建如下拓扑，连接OpenDayLight控制器

• Python代码

  #!/usr/bin/python
  #Creating Inernet Topo
  
  
  from mininet.topo import Topo
  from mininet.net import Mininet
  from mininet.node import RemoteController,CPULimitedHost
  from mininet.link import TCLink
  from mininet.util import dumpNodeConnections
  
  class MyTopo(Topo):
  	def __init__(self):
  		#Initialize Topology
  		Topo.__init__(self)
  
  		sw1 = self.addSwitch('s{}'.format(1))
  		#add Hosts
  		count = 1
  		for i in range(0, 3):
  			host = self.addHost('h{}'.format(count))
  			count+=1
  			self.addLink(host,sw1)
  
  topos = {'mytopo':(lambda:MyTopo())}
  
  

• 运行结果+Pingall
  

• 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

• 查看拓扑端口连接：
  
  h1 连接 s1 端口 1、h2 连接 s1 端口 2、h3 连接 s1 端口 3

• ODL:
  

• ODL具体设置：

  • get要改成put，node/openflow:1，table/0，flow/不超过1024，flow id为1，in-port为2，type为0x0800，目的地之为10.0.0.3/32
  • instruction list中order为0，action list中order为0
  • hard-timeout为20
    
    
    

• 效果：
  

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。

• 查看preview
  

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": "1",
                "ethernet-match": {
                    "ethernet-type": {
                        "type": "0x0800"
                    }
                },
                "ipv4-destination": "10.0.0.3/32"
            },
            "instructions": {
                "instruction": [
                    {
                        "apply-actions": {
                            "action": [
                                {
                                    "drop-action": {},
                                    "order": "0"
                                }
                            ]
                        }
                    }
                ]
            },
            "flow-name": "1",
            "priority": "65535",
            "hard-timeout": "10",
            "cookie": "0x02",
            "table_id": "0"
        }
    ]
}

打开postman，但是卡在进入界面，还会让我虚拟机疯狂死机，崩溃中上网查资料后，用rm -rf $HOME/.config/Postman后再./Postman，进入页面

将preview里的url复制到地址栏，消息方式选PUT
IP为控制器所在的PC的IP
type选择Basic Auth 用户名和密码是ODL的登录账号和密码都是admin

• Body中将消息格式设置成json，上传方式设置为raw
  将preview中的消息粘贴在文本框内，更改id为10，点击send后下发成功
  
• 发送成功后改为GET并send查看刚刚下发的流表项
  

{
    "flow": [
        {
      "id":"10" ,
      "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": {}
                                }
                            ]
                        }
                    }
                ]
            },
            "hard-timeout": "20",
            "table_id": "0"
        }
    ]
}