Wireshark · Ethereal-users: RE: [Ethereal-users] Measuring intervals of transfer time

["Champion, Tim" <Tim.Champion@xxxxxxx>]

Ethereal allows you to merge multiple capture files so you can easily
when the packet was transmitted and received.

-----Original Message-----
From: ethereal-users-bounces@xxxxxxxxxxxx
[mailto:ethereal-users-bounces@xxxxxxxxxxxx] On Behalf Of Donald Prue
Sent: 14 July 2006 15:58
To: 'Ethereal user support'
Subject: RE: [Ethereal-users] Measuring intervals of transfer time

VAIBHAV,

I would think that the only way to accomplish your time measurement is
to
have a sniffer (Ethereal) at each end of the link and they MUST be
time-synced from the same NTP server or else the times are meaningless.
I
hope you can get it done.

Don Prue 
Nye County 
Manager, Network Operations  
   
dprue@xxxxxxxxxxxx
Desk - 775.751.4266 
Cell   - 775.764.0572 


-----Original Message-----
From: ethereal-users-bounces@xxxxxxxxxxxx
[mailto:ethereal-users-bounces@xxxxxxxxxxxx] On Behalf Of
vaibhav_kaware@xxxxxxxxxxxxxxxx
Sent: Friday, July 14, 2006 12:01 AM
To: ethereal-users@xxxxxxxxxxxx
Subject: [Ethereal-users] Measuring intervals of transfer time

Hi,
I intend to measure the time of transfer of a given packet
from source to the destination. 

But each packet has a single time stamp, that of arrival time
on the client machine. This only marks a single point on the
timeline. 

Is it possible to get the duration of travel of the packets
using Ethereal? If yes, how?
Alternatively, is it possible to get the arrival timestamps of
the packets, 'of the other end'?

If not, what could I employ to perform the measurements?

-VAIBHAV

Please read further if further clarification required.
-----------------------------------------------------------
e.g.
If there is a webpage small enough that gets transferred from
the server to the client machine within one packet, then there
is no way of knowing how long it took for the transfer from
server to the client, looking just at the arrival time-stamp
on the packet.

e.g.
If a 'file' transfer (download) takes place in 'n>1' number of
packets, then seldom will all the packets arrive in an
uninterrupted queue at the client's machine. In that case, it
wont be possible to conclude about the download time of the
'file' as a whole.

e.g.
When I send a message, say,  using the instant messanger,
there is no way for me to know how much time it took for my
message to reach the other user, as all the timestamps on the
packets are the ones that belong to 'my' machine. What about
the arrival time-stamps at the other end?

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