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I work with industrial control systems. I often use an old non switching hub to monitor traffic between several devices, but I now have a problem where this would not be appropriate.

It is a network with bandwidth problems, and the central 100MB switch is routing raw ethernet packets between several different ports, as well as some ordinary IP traffic.

I need to find the bottlenecks and who is using most bandwidth etc...putting a hub in place of a switch is going to completely change the situation.

I know 'managed' switch have a lot of extra config possibilities, is there any way I could eg. monitor traffic on a GB managed switch with one port specially configured to output to WireShark?

Would it be realistic?

asked 12 Jul '17, 07:35

RogerIrwin's gravatar image

accept rate: 0%

This is called port mirroring or spanning, see here for info and have a look at the Wireshark wiki page on Ethernet Capture for info on how to capture on a mirror port.

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answered 12 Jul '17, 07:47

grahamb's gravatar image

grahamb ♦
accept rate: 22%

Thanks, some very clear explanations at the end of those links.

(12 Jul '17, 08:14) RogerIrwin
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question asked: 12 Jul '17, 07:35

question was seen: 6,005 times

last updated: 12 Jul '17, 08:14

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