GTP traffic profile for TRex

[Denis Gudtsov]

Hi All
I'm looking for a way how can i generate gtp-c and gtp-u traffic using TRex. I wonder why nobody contributed support of this feature yet? Is there any chance to get it working on TRex?
Thanks.

[hanoh haim]

You are welcome to contribute that.

Have you looked into this branch?

https://github.com/dimagol/trex-core/commits/master

Thanks

Hanoh 

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Hanoh

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[Denis Gudtsov]

No, i haven't look into it yet, thank you! strange, but googling didn't show me that branch. Project looks like that's i need, will check.

понедельник, 18 декабря 2017 г., 14:11:02 UTC+3 пользователь Hanoch Haim написал:

[Itay Marom]

Hi,

Are you considering this feature for stateless or stateful ?

If you are talking about stateless:

1. you can generate any traffic you like using scapy on the TX side (as long as it is supported by scapy)

    i see GTP-C control messages are supported on scapy:

    https://github.com/secdev/scapy/blob/master/scapy/contrib/gtp.py

2. if you need to handle RX packets as well you can create a service

    we have some examples such as DHCP.

    we use scapy to generate DHCP packets but we handle the state of machine of DHCP using async state machine which can scale up to

    ~64K clients in parallel (using single thread).

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

Thanks,

Itay

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Itay Marom

[Denis Gudtsov]

I'm not familiar with TRex yet, so can't answer do i need stateless or stateful. For the GTP-C only i think scapy should be enough (but i didn't understand how it can be used from Trex).
But the most interesting part is GTP-U traffic which is more higher volume than GTP-C and more utilize networking part. As soon as to start GTP-U we need GTP-C to be established before, so i guess service should be stateful. or not?

понедельник, 18 декабря 2017 г., 14:42:11 UTC+3 пользователь itaymar написал:

[Denis V. Gudtsov]

Hi all

I've build and run succesfully that fork with gtp support. The one thing i do not understand: it seems clients and servers are communicating each other inside t-rex simulator (i'm using http_simple_gtp.yaml). Can i run only client to generate traffic towards real PGW/GGSN? Thanks.

пн, 18 дек. 2017 г. в 17:47, Denis Gudtsov <denis....@gmail.com>:

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[lyu...@gmail.com]

Can you share some details on how to run gtp-u traffic using TRex?

[navar...@gmail.com]

Hi Denis, How are you?

I was looking at a GTP-U traffic generator and I faced this issue that you have answered that you were successful in doing that. Do you mind sharing the code? 

Thank you in advance.

Best,

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