Downloading the network simulation cradle with ./download.py?

[Arthur Wulf White]

I read here:
https://www.nsnam.org/docs/release/3.14/tutorial/singlehtml/index.html
That when I download NS-3, it's supposed to download NSC too?
However, when I download, I only seem to get the following:

    # Get NS-3 ...
    # Get PyBindGen ...
    # Get NetAnim ...
    # Get bake ...

How do I download NSC?

Thanks,

Arthur

[Konstantinos]

Dear Arthur,

The tutorial you read is for NS-3.14, and it is outdated.

From the ns-3 wiki you can get

"NSC is now hosted at WAND (NSC repository)." http://www.nsnam.org/wiki/Network_Simulation_Cradle_Integration

In addition, NSC development in NS-3 has been very active, on the contrary DCE has been.

I would suggest to look at DCE http://www.nsnam.org/docs/dce/manual/html/getting-started.html

Regards,

K.

[Arthur Wulf White]

Hello Konstantinos,

Thank you for the help. So you recommend I use DCE to run a simulation with cubic?

Best regards,
Arthur

[Konstantinos]

Yes, I think that DCE is better. 

TCP Cubic is included in linux kernels 2.6.19 and newer, and DCE supports 2.6.36-2.3

Just make sure you install the 'advanced' mode. 

[Arthur Wulf White]

How do I use the DCE TCP Cubic with an existing ns-3 scenario?
I saw this example:
http://www.nsnam.org/docs/dce/manual/html/dce-cradle.html
Is there any additional information on this?

I simply need to configure TCP to DCE with Cubic instead of the native new-reno  on an existing P2P star configuration..

Previously (with NSC) I used these as examples to see how nsc configures cubic:

./examples/tcp/tcp-nsc-lfn.cc
./examples/tcp/tcp-nsc-comparison.cc
./examples/tcp/tcp-nsc-zoo.cc

Best regards,
Arthur

[Konstantinos]

I haven't worked with DCE much. More information you can find here https://www.nsnam.org/overview/projects/direct-code-execution/

[Tommaso Pecorella]

Hi,

mind that there's a proposed patch (currently being reviewed) which will add TCP CUBIC to the ns-3 supported TCP flavors.

Cheers,

T.

[Arthur Wulf White]

Dear Tommaso,

How do I find this patch? Is there any chance you could attach the tgz?
Are users allowed to access patches before release?

Many thanks,

Arthur

[Konstantinos]

Hi Arthur 

Here is the proposed TCP cubic https://codereview.appspot.com/87740043

Users are welcome to download, test the code and provide reviews that would make the merging process quicker.

[Siddharth]

Hello Arthur,

To use CUBIC or any of the available congestion control algorithms, you could try the following procedure:

Enable the needed modules in the kernel:

  # patching arch/sim/defconfig with the needed changes (patch attached with this mail)

  $ patch defconfig < protocols_enabler.patch

  # cd to kernel base directory and rebuild kernel with the changes

  $ make clean ARCH=sim

  $ make defconfig library ARCH=sim

  # cd to bakefile.xml directory and build using bake to link new .so file

  $ bake/bake.py build

Once enabled, you could set specific congestion control algorithms using a system call in your test script as below:

  <stack>.SysctlSet(<specificNode>, ".net.ipv4.tcp_congestion_control", "cubic");

Do let me know if you have any further questions.

Cheers,

Siddharth

[feilu....@gmail.com]

Hi Konstantinos and Tom,

Has the ns-3 TCP cubic code been merged into official ns3 code?

If not, where could I find the latest version of the code? I could not open the link you shared last year: https://codereview.appspot.com/87740043

I could not find TCP cubic code in the latest ns 3.22 either.

I am evaluating to use TCP cubic in ns-3, if ns-3 does not natively support it, then I may use NSC or DCE cradle. Which one is easier to use, NSC or DCE cradle?

Thanks in advance for your help,

Feilu Liu

--------------

Ph.D., Senior Engineer,

Qualcomm Technologies, Inc.

[Konstantinos]

Hi Feilu,

You can download TCP cubic from the author's website

http://perform.wpi.edu/downloads/#cubic

I guess it is the same. I do not know why the codereview is not working.

From the discussions in the ns-3-reviews mailing list, I got that this patch was not merged, but some comments were given.

https://groups.google.com/d/msg/ns-3-reviews/hGx4gtIfbyc/PxXoFHJJy3wJ

https://groups.google.com/d/msg/ns-3-reviews/4JrqlIYTZjg/FyYpAiFCLhkJ

I have not used NSC at all and only slightly DCE. I would recommend going for DCE since it is actively developed and you can get feedback.

Also I think it is said to be more resource efficient based on some presentation I had seen.

[Feilu Liu]

Dear Konstantinos,

Thank you so much for your fast response! Really appreciate it.

Feilu Liu

--------------

Ph.D., Senior Engineer,

Qualcomm Technologies, Inc.

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[Tommaso Pecorella]

As far as I know, Cubic has been also implemented by Natale recently. We'll review his code soon™, and we plan to merge it along with some other TCP flavours.

Cheers,

T.

[Feilu Liu]

Thanks a lot Tom for the info!

Feilu

[Tom Henderson]

On 7/4/19 8:39 AM, Shahrukh Khan Kasi wrote:
>
> Hi,
>
>
> I have a question regarding the integration of LWIP with Network
> simulator 3. If I have to run simulations of LWIP in NS3 (or some
> other simulator) then how can that be possible?
>
>
> Best,
>
> Shahrukh
>
HI Shahrukh,

Would you mind please reposting your question with a new subject line
rather than replying to a subject line from a different topic?

Please have a look at our guidelines for posting:
https://www.nsnam.org/wiki/Ns-3-users-guidelines-for-posting

Thanks,

Tom