Network trace contains whole communication between IP devices over LAN. In order to analyse what this communication between devices contains, a network trace can be requested.
If network trace is requested, please note there are two possible network traces available. Gateway can provide network tracing with limited size on its side, for unlimited network trace of IP communication, external device (usually laptop or PC) equipped with network capture software needs to be used. This article explains how to perform both network trace in such software called Wireshark as well as network trace directly from gateway.
How to get Wireshark network trace?
How to get network trace from 2N® VoiceBlue Max?
Program Wireshark is used for tracing the communication between devices interconnected by LAN. The devices (e.g. PBX connected with a GSM gateway via LAN) send to each other packets which are captured by the above mentioned program. Wireshark is distributed under the Open source licence (http://www.wireshark.org/download.html).
Before Wireshark (or in general, any packet capture tool) is used, careful consideration should be given to where in the network packets are to be captured.
In order to capture all the packets which are sent via particular LAN, the devices have to be part of the same network segment (they have to be connected via HUB). If you do not have a hub you can use a switch which supports so called port mirroring (http://en.wikipedia.org/wiki/Port_mirroring).
Obtain a Wireshark package or installer for the operating system running on the system which is to be used for packet capture.
Download a binary or installer from http://www.wireshark.org. With installers, ensure all product components are selected for installation.
On a Linux or Unix environment, select the Wireshark or Ethereal entry in the desktop environment's menu, or run "wireshark" (or "ethereal") from a root shell in a terminal emulator.
In a Microsoft Windows environment, launch wireshark.exe from program installation folder.
Note that on Unix systems, a non-GUI version of Wireshark called "tshark" (or "tethereal") may be available as well, but its use is beyond the scope of this article.
After starting Wireshark, do the following: