Previously, many developers and engineers needed to add OpenFlow dissector to WireShark to analyze OpenFlow protocol packets in WireShark. It was so difficult stuff, because we needed to match the version of OpenFlow dissector and the version of Wireshark.


According to Wireshark wiki page (http://wiki.wireshark.org/OpenFlow), OpenFlow dissector will be available on Wireshark 1.12.0, and this version was released as 'Stable Release' on 31 July, 2014.


I have downloaded this stable release version and checked that this version well supports both OpenFlow 1.0 & 1.3!


Just download from Wireshark homepage (https://www.wireshark.org/download.html)and install the latest stable release of Wireshark.

After installation, you can see that your Wireshark supports OpenFlow 1.0, 1.3 and 1.4.


I have downloaded & installed Wireshark 1.12.0 on my Windows computer and it worked very well!


[Menu: Supported Protocols]


[Parts from supported protocols]


Here are some screenshots which show that OpenFlow 1.0 & 1.3 filters work very well:


[OpenFlow 1.0: openflow_v1]


[OpenFlow 1.3: openflow_v4]



Posted by Ian Y.

I have finished the draft translation of "RYU SDN Framework", written in Japanese & English.


HTML: http://ianychoi.github.io/ryu-book/ko/html/

PDF: http://ianychoi.github.io/ryu-book/ko/Ryubook.pdf


This book was published in Japanese first, on the early of this year

(http://osrg.github.io/ryu-book/ja/html/)

and after several months, the English edition of this book was also published

(http://osrg.github.io/ryu-book/en/html/).


I'm not good at Japanese, but I mainly used Google translator (http://translate.google.com).

So please give me feedback through github (https://github.com/ianychoi/ryu-book/).


Currently, the PDF edition has line-feed problems.

I think it is because of the conflict between ko.tex & listings packages used in Latex,

but it is a little bit difficult for me to solve this problem..


I hope that more Korean developers will read this book and contribute to SDN worlds!


Note: Ryu is a SDN controller written by Python, and supports various OpenFlow versions: 1.0, 1.2, 1.3 and 1.4.



Posted by Ian Y.

OpenStack Icehouse was officially released on the last Thursday (Apr 17, 2014).


At that time, I checked on DevStack code base on GitHub, and found that icehouse branch was already created! https://github.com/openstack-dev/devstack/tree/stable/icehouse )

I installed this Icehouse Release. It was a little bit easier than I expected, so I recorded my installation steps and uploaded into YouTube.


I am now practicing my English skills. Although some pronunciations are not well, please see and give comments on my videos.


I installed DevStack using VirtualBox with Ubuntu 12.04 LTS, and I configured network using Neutron.

The followings are YouTube URL information:


#1: Downloading VirtualBox & Ubuntu, and basic Ubuntu installation for DevStack

 - http://youtu.be/zoi8WpGwrXM


#2: Actual DevStack installation steps (Icehouse, Neutron)

 - http://youtu.be/1GgODv34E08


You can download localrc file on http://goo.gl/OeOGqL .


Thank you,



Posted by Ian Y.