Re: Ns3 Fat Tree Topology

[Ashok Kumar]

Hi Linh
I am sending with this reply code for variation of fat-tree. In this topology there are four pods but unlike in fat-tree the pods are connected
in the form of Mesh. Hope it will help you in getting answers for the questions you have asked.
I am searching for code for fat-tree, once I get it, I will post that code too.

On Wed, Jan 16, 2013 at 7:49 PM, Linh Vu <linh...@gmail.com> wrote:

Hi Ashok Kumar,

I am Linh from NTU University (Singapore). I am currently working on fat-tree topology and I found a lot of your related posts in ns3 google group. Therefore if you don't mind, may I ask you some simple questions about the coding? If you are busy or not interested in this, please kindly ignore this email.

Firstly, I see that you used Click Module for the simulation. But I see some others use OpenFlow instead. So what is the difference between Click and OpenFlow? And do they work the same for the fat-tree? 

Secondly, should I use CSMA or Point-to-point? Since nowadays real Network channel link mostly are point-to-point, so I tend to point-to-point, but I see most people still use CSMA in ns3.

Thirdly, I have problem with subnet IP addressing. As an edge switch connect to a number of hosts, and each connection is a separate net device, so different IP address for each of them. In such way, it is not possible to create a proper subnet as I want. You have any idea about this? 

I would really appreciate if you can help me on this, I have been stuck with this for few days already!!

Regards,

Linh

--
Vu Ngoc Linh, "LINH" (Mr.)

Computer Engineering, School of Computer Engineering

Nanyang Technological University

Contact:

+65-97351426

[Linh Vu]

Thanks, Kumar!! Your code helps me a lot actually, I can solve most of my problems now!!!

[arash ams]

hello
I have the same problem and I don't know how to find or create fat tree topology
could you plz help me?