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Difference between revisions of "Wireshark - capture data"

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In order to capture data you need the following equippment:
 
In order to capture data you need the following equippment:
* A PC with a
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* A PC with Wireshark installed
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* A netwok hub
  
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===Wireshark===
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Wireshark (formerly known as Ethereal) is a packet analyzer (also known as Ethernet sniffer) that can intercept and log traffic passing over the ethernet port. As data streams flow across the network, the sniffer captures each packet and eventually decodes and analyzes its content according.
  
*[[Wireshark]] (formerly known as Ethereal)
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Wireshark is freeware and can be downloaded from http://www.wireshark.org/.
  
  

Revision as of 13:03, 26 November 2008

Sometimes it is useful for debugging purposes to analyse the data on the AlphaCom ethernet port. This article describes how to use the PC program Wireshark to capture data from the ethernet port of the AlphaCom.

In order to capture data you need the following equippment:

  • A PC with Wireshark installed
  • A netwok hub

Wireshark

Wireshark (formerly known as Ethereal) is a packet analyzer (also known as Ethernet sniffer) that can intercept and log traffic passing over the ethernet port. As data streams flow across the network, the sniffer captures each packet and eventually decodes and analyzes its content according.

Wireshark is freeware and can be downloaded from http://www.wireshark.org/.



Note that a HUB must be used, not a switch.

A protocol analyzer connected to a switch does not always receive all the desired packets since the switch separates the ports into different segments. Connecting the protocol analyzer to a hub allows it to see all the traffic on the segment. (Expensive switches can be configured to allow one port to listen in on traffic from another port. This is called port mirroring. However, these cost much more than a hub.)