One question I have is how does tethereal deal with retransmissions when using this statistics mode.
Does it:
1) Count every packet regardless of sequence numbers
2) not count the retransmitted packet
3) Not count the original packets, just the last instance of the sequence number
It seems that if it does 1 or 2, than it is not a true measure of throughput but rather of how much data was sent. Only the third method would give you something closer to what really made it through.
This of course more significant when the capture is on the same network as the sender and not at the receive point.
Paul
-----Original Message-----
From: Ian Schorr [mailto:spamcontrol2@xxxxxxxxxxx]
Sent: Thursday, July 10, 2003 2:10 PM
To: Raghu Ram Jakkampudi
Cc: ethereal-users@xxxxxxxxxxxx
Subject: Re: [Ethereal-users] Throughput
Ah, noticed you said "numerically", in which case you may have been
looking for something more like this:
From a command-line,
"tethereal -r filename.cap -R unmatched.display.filter -z io,stat,1"
where "filename.cap" is the trace file that you want to generate
statistics from, "unmatched.display.filter" is a display filter that no
frame in the trace (this is to supress the decoding of packets and
display only statistics. I never work with Token Ring, so I usually use
"-R tr" here), and "1", in this case, is the amount of time, in seconds,
of each sample.
In this case, tethereal will generate a set of bytes/sec and frames/sec
statistics that I can parse, import into and manipulate with
Excel/OpenOffice Spreadsheet, etc.
You can find more information about statistics generation with tethereal
in the tethereal man page.
If this isn't what you're looking for, can you provide more details on
what you're trying to do?
Ian
Ian Schorr wrote:
> Are you looking for something like this?
>
> Go to Tools->Statistics->IO->IOStat
> Change Frames/Tick to Bytes/Tick
> Change Tick Interval to the interval that you want.
>
> Ian
>
> Raghu Ram Jakkampudi wrote:
>
>> Hi
>> I was wondering if Ethereal can display the throughput
>> statistics,like the number of bytes that are transferred per second
>> numerically.
>> Please let me know how if it can do it.
>> Thank you
>> Raghu
>>
>> --
>> Computer Science Dept.
>> University of Alabama in Huntsville
>>
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>>
>>
>>
>
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