blocks|key|900159|text|在PC上尝试任何东西之前，先在VM(可能是Ubuntu)上安装Open+vSwitch，并尝试它的OpenFlow功能。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|900160|要在ubuntu上安装开放式vSwitch，|900161|900162|+sudo+apt-get+install+openvswitch-switch|blockquote|900163|900164|900165|您可以使用像Floodlight或Ryu+SDN+framework这样的控制器作为交换机的控制器。|offset|length|900166|这是一个OpenFlow教程。它已经过时了，但仍然提供了丰富的信息http://archive.openflow.org/wk/index.php/OpenFlow_Tutorial|900167|或者你也可以按照@EricSorensen在之前的回答中建议的那样尝试mininet。Mininet允许您使用主机和交换机模拟网络。在使用mininet时，您可以使用其内置的'nox‘控制器。不过，我更喜欢泛光灯。|900168|希望它能帮上忙！|900169|entityMap|0|LINK|mutability|MUTABLE|url|http://www.projectfloodlight.org/floodlight/|1|http://osrg.github.io/ryu/|2|http://archive.openflow.org/wk/index.php/OpenFlow_Tutorial^0|0|0|0|0|0|0|6|A|0|H|H|1|0|X|1M|2|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|16|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|17|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|18|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|19|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1B|8|@]|9|@$L|1C|M|1D|1|1E]|$L|1F|M|1G|1|1H]]|A|$]]|$1|N|3|O|5|6|7|1I|8|@]|9|@$L|1J|M|1K|1|1L]]|A|$]]|$1|P|3|Q|5|6|7|1M|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1N|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]]|U|$V|$5|W|X|Y|A|$Z|10]]|11|$5|W|X|Y|A|$Z|12]]|13|$5|W|X|Y|A|$Z|14]]]]

Before you try anything on a PC, Install Open vSwitch on a VM(probably Ubuntu) and try its OpenFlow functionality.

To install Open vSwitch(OVS) on ubuntu,

<blockquote>
 sudo apt-get install openvswitch-switch
</blockquote>

You could get a controller like <a href="http://www.projectfloodlight.org/floodlight/" rel="nofollow">Floodlight</a> or <a href="http://osrg.github.io/ryu/" rel="nofollow">Ryu SDN framework</a> to act as the controller for your switch.

Here is an OpenFlow tutorial. It is outdated but still informative <a href="http://archive.openflow.org/wk/index.php/OpenFlow_Tutorial" rel="nofollow">http://archive.openflow.org/wk/index.php/OpenFlow_Tutorial</a>

Or you could also try mininet as @EricSorensen suggested in the previous answer. Mininet allows you to simulate a network with hosts and switches.
While using mininet, you could use its inbuilt 'nox' controller. I'd prefer floodlight though.

Hope it helps!

blocks|key|1051710|text|这就是你所需要的：http://mininet.org/查看下载和教程。使用虚拟机或从源代码进行本机安装(在Linux上)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1051711|entityMap|0|LINK|mutability|MUTABLE|url|http://mininet.org/^0|9|J|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

This is all you need: <a href="http://mininet.org/" rel="nofollow">http://mininet.org/</a>
Check the downloads and tutorial. Use either a Virtual Machine, or native install from source (on Linux)

blocks|key|900191|text|您可以在基于linux的PC上安装openvswitch或使用中的ofsoftswitch13，该PC至少有两个物理interfaces.so，数据包路由可以看到。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|900192|此外，使用mininet+可以运行(对于这个接口就足够了)，它支持创建各种网络拓扑。|900193|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

you can install openvswitch or use ofsoftswitch13 from <a href="https://github.com/CPqD/ofsoftswitch13" rel="nofollow">https://github.com/CPqD/ofsoftswitch13</a> in a linux based PC with at least two physical interfaces.so that the packet routing can see.

Also using mininet <a href="https://github.com/mininet/mininet" rel="nofollow">https://github.com/mininet/mininet</a> can run OF (for this one interface is enough) which supports the creation of various network topologies.

blocks|key|3215969|text|根据测试建议，您可以简单地在最新的Linux发行版上执行apt-get+install或类似的命令。openvswitch有两个组件，一个内核模块和一个用户空间openvswitch。用户空间进程不需要任何特定数量的内核或处理器类型，而且在大多数情况下，您可以使用少于一个内核的内核。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3215970|除了ovs之外，你还需要ovsdb，apt-get+install或类似的东西会自动为你设置(因此是最简单的方法)。同样，非常轻量级，它只是一个json键值数据库。|3215971|对于控制器，有很多选项，但是为了解决这个问题，你也可以使用内置的命令行工具。|3215972|ovs-apptctl:设置交换机http://openvswitch.org/support/dist-docs/ovs-appctl.8.txt|offset|length|3215973|ovs-oftcl:添加/mod/flow+http://openvswitch.org/support/dist-docs/ovs-ofctl.8.txt|3215974|ovs-dpctl:查看内核流程|3215975|我强烈建议在选择Pox、Daylight等之前，先体验一下命令行工具、OpenFlow命令以及流程是如何工作的。|3215976|除了mininet之外，还有Oftest+(https://github.com/floodlight/oftest)，它主要用于为openflow编写测试，但在受限环境中学习和调试问题非常有用。|3215977|entityMap|0|LINK|mutability|MUTABLE|url|http://openvswitch.org/support/dist-docs/ovs-appctl.8.txt|1|http://openvswitch.org/support/dist-docs/ovs-ofctl.8.txt|2|https://github.com/floodlight/oftest^0|0|0|0|H|1L|0|0|M|1K|1|0|0|0|M|10|2|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|14|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|15|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|16|8|@]|9|@$H|17|I|18|1|19]]|A|$]]|$1|J|3|K|5|6|7|1A|8|@]|9|@$H|1B|I|1C|1|1D]]|A|$]]|$1|L|3|M|5|6|7|1E|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1F|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1G|8|@]|9|@$H|1H|I|1I|1|1J]]|A|$]]|$1|R|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]]|S|$T|$5|U|V|W|A|$X|Y]]|Z|$5|U|V|W|A|$X|10]]|11|$5|U|V|W|A|$X|12]]]]

As suggested for testing you can simply do a apt-get install or similar on most recent Linux distros. There are two components to openvswitch, a kernel module and the user space openvswitch. The user space process does not require any specific number of cores or processor type and for the most part you can do with less than a core.

Apart from ovs you also need ovsdb, which apt-get install or similar will automatically set up for you (hence the easiest way to go about it). Again pretty lightweight its just a json key-value db.

For the controller there are a lot of options but for playing around you can use the built in command line tools as well.

ovs-apptctl: To setup the switch <a href="http://openvswitch.org/support/dist-docs/ovs-appctl.8.txt" rel="nofollow">http://openvswitch.org/support/dist-docs/ovs-appctl.8.txt</a>

ovs-oftcl: To add/mod/flows <a href="http://openvswitch.org/support/dist-docs/ovs-ofctl.8.txt" rel="nofollow">http://openvswitch.org/support/dist-docs/ovs-ofctl.8.txt</a>

ovs-dpctl: To see the kernel flows

I would highly recommend getting a feel for the command line tools, OpenFlow commands and how flows work before picking Pox, Daylight etc. 

Apart from mininet there is also Oftest (<a href="https://github.com/floodlight/oftest" rel="nofollow">https://github.com/floodlight/oftest</a>) that is primarily used to write tests for openflow but its pretty useful to learn and debug issues in a constrained environment.

blocks|key|900238|text|运行OpenvSwitch|type|unstyled|depth|inlineStyleRanges|entityRanges|data|900239|如果你想用裸机构建OpenvSwitch，我建议你使用官方的tarball来安装OpenvSwitch守护进程。请按照以下步骤操作：|900240|#/bin/bash
#+In+root+permission
aptitude+install+dh-autoreconf+libssl-dev+openssl
wget+http://openvswitch.org/releases/openvswitch-2.4.0.tar.gz
tar+zxvf+openvswitch-2.4.0.tar.gz+&&+cd+openvswitch-2.4.0
./boot.sh
./configure+#+If+you+want+to+build+kernel+module,+please+append+--with-linux=/lib/modules/`uname+-r`/build
make+modules_install
modprobe+gre
modprobe+openvswitch
modprobe+livcrc32c
ovsdb-tool+create+/usr/local/etc/openvswitch/conf.db+/usr/local/share/openvswitch/vswitch.ovsschema
ovsdb-server+--remote=punix:/usr/local/var/run/openvswitch/db.sock+\
--remote=db:Open_vSwitch,Open_vSwitch,manager_options+\
--pidfile+--detach+--log-file
ovs-vsctl+--no-wait+init
ovs-vswitchd+--pidfile+--detach+--log-file|code-block|syntax|javascript|900241|您可以使用ovs-ofctl+show的ovs-vsctl+show查看OpenvSwitch状态。下一步，我们需要向OpenvSwitch网桥添加物理或逻辑(如veth对)接口|offset|length|style|CODE|900242|#+Create+OpenvSwitch+is+named+'ovs-br'
ovs-vsctl+add-br+ovs-br

#+Add+interface+to+OpenvSwitch+bridge
#+If+you+want+to+check,+please+use+`ovs-vsctl`+to+check+again.++++
ovs-vsctl+add-port+ovs-br+eth0

#+Set+OpenFlow+controller
#+You+should+ready+one+controller
#+If+not,+I+have+two+installation+solutions+can+give+you
#+Ryu+installation:+https://github.com/sdnds-tw/ryu-installer
#+ONOS+installation:+https://github.com/pichuang/onos-ansible
ovs-vsctl+ovs-br+set-controller+tcp:x.x.x.x:6653

#+Use+ovs-vsctl+to+check+controller+attribute+is+UP|900243|entityMap^0|0|0|0|5|E|K|E|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@$K|W|L|X|M|N]|$K|Y|L|Z|M|N]]|9|@]|A|$]]|$1|O|3|P|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

Running OpenvSwitch

If you want to build OpenvSwitch with bare metal, I suggest you use official tarball to install OpenvSwitch daemon.
Please follow this step: 

<pre><code>#/bin/bash
# In root permission
aptitude install dh-autoreconf libssl-dev openssl
wget http://openvswitch.org/releases/openvswitch-2.4.0.tar.gz
tar zxvf openvswitch-2.4.0.tar.gz &amp;&amp; cd openvswitch-2.4.0
./boot.sh
./configure # If you want to build kernel module, please append --with-linux=/lib/modules/`uname -r`/build
make modules_install
modprobe gre
modprobe openvswitch
modprobe livcrc32c
ovsdb-tool create /usr/local/etc/openvswitch/conf.db /usr/local/share/openvswitch/vswitch.ovsschema
ovsdb-server --remote=punix:/usr/local/var/run/openvswitch/db.sock \
--remote=db:Open_vSwitch,Open_vSwitch,manager_options \
--pidfile --detach --log-file
ovs-vsctl --no-wait init
ovs-vswitchd --pidfile --detach --log-file
</code></pre>

You can use <code>ovs-vsctl show</code> of <code>ovs-ofctl show</code> to check OpenvSwitch status. Next step, we need to add physical or logical (likes veth pair) interfaces to OpenvSwitch bridge

<pre><code># Create OpenvSwitch is named 'ovs-br'
ovs-vsctl add-br ovs-br

# Add interface to OpenvSwitch bridge
# If you want to check, please use `ovs-vsctl` to check again. 
ovs-vsctl add-port ovs-br eth0

# Set OpenFlow controller
# You should ready one controller
# If not, I have two installation solutions can give you
# Ryu installation: https://github.com/sdnds-tw/ryu-installer
# ONOS installation: https://github.com/pichuang/onos-ansible
ovs-vsctl ovs-br set-controller tcp:x.x.x.x:6653

# Use ovs-vsctl to check controller attribute is UP
</code></pre>

blocks|key|900266|text|一旦你让另一个服务器(这里我们称之为控制器)来决定你的本地机器(这里是你的PC)的数据包转发行为，它就变成了所谓的SDN机制。因此，选择哪种CPU或硬件并不重要，基本上，您可以将SDN视为一种软件解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|900267|对于安装支持SDN的软件的过程，您可以选择open+vswitch，上面的帖子中已经回答了这一问题。|900268|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Once you let another server(here we call it controller) to determine the packet forwarding behavior of your local machine (here it is your PC), it turns into so-called SDN mechanism. So it's not relevant what kind of CPU or hardware you are choosing, basically, you can consider SDN as a software solution.

For the process to install the SDN-enabled software, you can choose open vswitch which has been answered in the above posts.

I have a question about the running of OpenFlow switch:
If we want to run OpenFlow on such a PC or a router to work as an OpenFlow switch, what should we do for that?, and is the CPU type or platform of that device important? does it make any difference?

thanks in advance.

Running OpenFlow on a PC?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个关于OpenFlow交换机运行的问题:如果我们想在这样的PC或路由器上运行OpenFlow作为OpenFlow交换机，我们应该怎么做？这有什么不同吗？提前谢谢。

问在PC上运行OpenFlow？
EN

回答 6

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