Sending shaped traffic

[antoine...@gmail.com]

Hi

I would like to send subrate Gbps traffic at a rate shaped at 200, 300, 500 Mbps for example.Basically slower than the VM interface speed.

I was hoping that playing with the inter packet gap would do. But my experiments show it does not. After going through the docs, I in fact wonder if that is possible.

Thanks

[ido barnea]

Is not the -m command line argument exactly what you need?

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[antoine...@gmail.com]

This option seems to multiply the CPS number. Or maybe my issue is why the IPG is not taken into account?

[ido barnea]

So, can you explain the issue better.
You said that you want to send traffic at different rates. This can be achieved by -m.
Relevant parameters here are really IPG and connection per second, but it is enough to change one of them (using -m).

> On 23 Feb 2017, at 3:45 PM, antoine...@gmail.com wrote:
>
> This option seems to multiply the CPS number. Or maybe my issue is why the IPG is not taken into account?
>

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[antoine...@gmail.com]

Hello,

for example, I would like to send some IMIX traffic at an exact configured rate, because I want to plot CPU usage vs traffic rate.

Now, I have noticed that I need to add the option 'cap_ipg: false' if I want the configured ipg to be taken into account. Then, I could see with the http_simple.yaml example that playing with gap and number of connections changes indeed the traffic rate.

But if I take the IMIX 100k flows example, it does not, because, I guess, the pcap file just include one packet.

I would be grateful if someone has a yaml example with IMIX working at different rates and with a configurable number of sessions.

[hanoh haim]

Hi,

For IMIX you should better work with Stateless (it was design for that and works much faster with better automation)

See the Stateless manual

https://trex-tgn.cisco.com/trex/doc/trex_stateless.html

The profile for imix is 

stl/imix.py

You can change the rate and ratio. No *don't* need to change ipg

You could look into the automation example to create a script that would it for you.

See this imix example script

https://github.com/cisco-system-traffic-generator/trex-core/blob/master/scripts/automation/trex_control_plane/stl/examples/stl_imix.py

Thanks,

Hanoh

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