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

Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.

Date Prev · Date Next · Thread Prev · Thread Next
Date Index · Thread Index · Other Months · All Mailing Lists
From: Richard Urwin <richard@xxxxxxxxxxxxxxx>
Date: Mon, 10 Nov 2003 00:09:15 +0000
On Sunday 09 Nov 2003 11:09 pm, Guy Harris wrote:
> On Sun, Nov 09, 2003 at 10:55:56PM +0800, Ching Tung Lo wrote:
> > 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.
> > Do you think it is a good method to measure the performance of DNS
> > using ethereal?
>
> If you're doing it by running Ethereal - or Tethereal or tcpdump - on a
> machine other than the DNS server, capturing shouldn't affect the
> server's performance; however, that might be difficult to do if you're
> on a switched network.

If you put an unswitched hub between the switch and the server with just the 
three connections: server hub and ethereal, it shouldn't affect the server 
performance. Or not by much.

-- 
Richard Urwin