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）

安装代码

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

2. 用Python脚本搭建如下拓扑，连接OpenDayLight控制器

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):
        Topo.__init__(self)
        s=[]
        for i in range(1):
            sw = self.addSwitch('s{}'.format(i+1))
            s.append(sw)
        count=1 
        for i in range(3):
            host = self.addHost('h{}'.format(count))
            self.addLink(s[0],host)
            count += 1
topos = {'mytopo': (lambda:Mytopo())}

pingall结果

打开ODL，reload

3. 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

下发流表设置过程：

查询链路连接情况

h1 ping h3,发生延时。

4. 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。

安装运行postman，下发流表json格式

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"
            },
            "priority": "65535",
            "hard-timeout": "25",
            "cookie": "2",
            "table_id": "0"
        }
    ]
}

将preview的url复制到地址栏，输入odl的默认账号和密码admin

将preview的消息粘贴在文本框中，修改id和url里的flow为2，防止与之前的流表重合，点击send后下发成功，然后改为GET并send查看刚下发的流表，如下图

get查看下发流表