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Network interface switches

asked 2019-06-19 13:05:04 +0000

Farhad gravatar image

Hello there,

I want to use Wireshark to monitor traffic exchange in an small network made of two sensor nodes, my laptop as a server, and a router that I just use to connect my laptop and the sensor nodes. You can consider it as a small IoT.

Before running Wireshark, all works fine; sensor nodes periodically send their measures to my laptop through WiFi and my laptop prints the measurement. The issue is when I run Wireshark. When I run Wireshark and put the network interface in monitor mode and then start capturing packets, the network becomes disconnected and it switches to another WiFi network if it is available. I played with different options but I have not yet figured out why this is happening.

I should add that Wireshark normally works fine, and can capture packets on say my home WiFi network or my WiFi network at work. This problems appears when I want to capture traffic of my IoT. Could you provide me some hints on how this can be fixed?

Thank you,

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answered 2019-06-19 13:10:57 +0000

grahamb gravatar image

See the Wireshark Wiki page on WLAN capture setup, in particular the section on monitor mode.

As your laptop is the server for your tests, unless you actually need to see the radio info, you don't need monitor mode. Simply capture on the WiFi interface and you'll see the packets from your sensor nodes.

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You are correct. I applied your comment and it is working now.

Thank you,

Farhad gravatar imageFarhad ( 2019-06-19 13:40:47 +0000 )edit

If an answer has solved your issue, for the benefit of others with the same issue, please accept it by clicking the checkmark icon to the left.

grahamb gravatar imagegrahamb ( 2019-06-19 13:42:47 +0000 )edit

Great, sure :)

Farhad gravatar imageFarhad ( 2019-06-19 13:49:21 +0000 )edit

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Asked: 2019-06-19 13:05:04 +0000

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Last updated: Jun 19 '19