Ethereal-users: Re: [Ethereal-users] help:reduce the performance of application using ethereal

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From: Loïc Minier <lool+ethereal@xxxxxxxxxx>
Date: Sun, 9 Nov 2003 16:05:58 +0100
Ching Tung Lo <g931319@xxxxxxxxxxx> - Sun, Nov 09, 2003:

> I want to use ethereal to  collect UDP packets to measure the performance of
> DNS server.
> But It seemed to lower the performance of DNS server when I used  the command
> of "tethereal -l -V port 53" to collect UDP packets.

 I suggest recording a capture to disk with windump/tcpdump and analyse
 it later using ethereal, on another machine for example. Capturing the
 data doesn't cost a lot, but dissecting every packet might.

> Do you think it is a good method to measure the performance  of DNS using
> ethereal?

 This depends on what you want to measure, but you will certainly learn
 tons of things on your traffic.

-- 
Loïc Minier <lool@xxxxxxxx>