How much bandwith and how much data is being used between a client and a server?: help needed

From: José Vicente Núñez Zuleta (josevnz@yahoo.com)
Date: 11/08/01

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Message-ID: <20011108234542.16015.qmail@web10003.mail.yahoo.com>
Date: Thu, 8 Nov 2001 17:45:42 -0600 (CST)
From: José Vicente Núñez Zuleta <josevnz@yahoo.com>
Subject: How much bandwith and how much data is being used between a client and a server?: help needed

Greetings,
  I'm trying to find out how much bandwidth is being
consumed by a set of clients in a local network (we
are crunching numbers and before to jumt to a Gigabit
Ethernet we need to know if our current config is
ok).
  I managed to measure the bandwith between the client
and the server using iperf
(http://dast.nlanr.net/Projects/Iperf/#previous) and
recognized.
to see some traffic using ethereal
(http://www.ethereal.com/introduction.html#license)
recognized.
but the info was not very helpfull (because ethereal
doesn't gave me the througput of each app).
  Now i'm using tcpdump on the server machine,
capturing
all the traffic that comes from the client machine as
follows:
  [root@linux0101 src]# tcpdump -nn -i eth0 -s 9999
-vvv
src host 10.1.20.102 -w sniff2.log
Then i'm processing the data with tcptrace as
follows:
[root@josevnz devtest]# tcptrace -l -r -W
sniff2.log.gz
  I'm sending like 9MB of data per transaction, but
the
output of tcptrace is showing me only the size of the
headers data not the whole conversation size.
  Now the questions:
  1) There is a way to tell how much data was
exchanged
in a conversation between a client an a server?
  2) How can i know the bandidth taken during a
certaim
period of time for all the clients conecting to the
server?
  Thanks in advance,
  Jose Vicente

=====
System Engineer, José Vicente Nuñez Zuleta (josevnz@yahoo.com)
Java 2 Certified Programmer
Java 2 Certified Developer
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Next message: José Vicente Núñez Zuleta: "How can i know how much data is transfered between a client and a server (length of the whole conversation) or how much bandiwth is being used in a given time for a given interface?"
Previous message: Daikichi Osuga: "Re: Questions - HTTP module and ATM interface"
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