Frenetic Python实验(二)

实验3 packet_in_out

目的:模拟一个普通的双端口中继器.

This application implements a very simple 2 port repeater where all the traffic goes through the controller.

1.终端1启动控制器。

2.终端2执行mininet命令:

sudo mn --topo=single,2 --controller=remote

3.终端3执行应用脚本:

$ python -m frenetic.examples.packet_in_out

控制器信息:

4.终端2中mininet执行pingall:

mininet> pingall

控制器终端出现大量packet_out信息:

pingall in the Mininet window should yield 100% successfully sent packets. There will be a lot of Packet Out activity.

注意:虽然原文说会达到100%的pingall成功率,但是实际操作往往成功率比较低,大概是因为长时间没有更新。

实验4 port_count

目的:记录经过端口的包的数目。

This application polls for port statistics and prints them every five seconds. It implements a simple switch-based repeater for a single switch and an arbitrary number of ports.

在终端3每个5s打印一次端口信息。

1.运行控制器。

2.终端2创建mininet拓扑:

sudo mn --topo=single,10 --controller=remote

3.终端3运行应用脚本:

$ python -m frenetic.examples.port_count

控制器端信息:

由于bug,h4的信息没有更新:

4.终端2执行pingall:

mininet> pingall

应用终端打印端口信息:

控制器端:

pingall in the Mininet window should yield 100% successfully sent packets. Port counts should keep climbing as ping traffic gets forwarded.

同样,虽然它说100%成功,但是实际并不是这样子的,h4的流表信息没有更新。

2016/11/30

posted @ 2016-11-30 18:56  Wasdns  阅读(172)  评论(0编辑  收藏  举报