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How to measure 3 L2L connections

asked 2019-11-11 19:00:37 +0000

lolner gravatar image

Hello Guys!

I'm needing some help, we have a project that we need to measure the connection of 3 Lan to Lan networks that are in a ring topology.

The links stream videos to each other for midia production with RTP, and we need to analyze and measure the UDP packets loss, multi cache and the jitter.

Is there any way to do it with Wireshark?

Thank you all in advance!

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answered 2019-11-11 20:50:15 +0000

updated 2019-11-19 22:01:39 +0000

You can do this with Wireshark in general. But as you talk about UDP traffic things are getting a little bit more complicated.

When you want to analyze at UDP traffic packet loss and jitter I recommend you to use special capture hardware with precise HW time stamping less than 100 microsec better less than 100 ns (If we talk about speeds >= 1 Gbit/s).

The easiest way is to do a multiple point capture and compare the number of captured packets and timings.

Harder approach: If you have to do it with a single point capture you need, for determining packet loss in an UDP stream, a sequence number at application level to to see if a packet is missing. Or you can try to guess a packet loss by looking at the IP.ID or when the traffic has a constant packet rate by the timing of the packets, but this guessing approach is not pretty much reliable.

If you have considered this, you can capture your traffic and do somme analysis in Wireshark. - For example have a look at the delta time - IO Graph maximum delta and minimum delta - Analyze the (Application) Sequence Numbers, if present

Different approach: If you just want to proof the quality of your network, you can try an active measurement by some traffic generation tools like: perf, ostinato, flowgrind But here I also suggest some professional equipment to perform such tests.

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Asked: 2019-11-11 19:00:37 +0000

Seen: 52 times

Last updated: Nov 19