tcptrace How to compute packet loss rate?

From: Minghua Chen (minghua@eecs.berkeley.edu)
Date: 02/26/03

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Date: Tue, 25 Feb 2003 21:23:01 -0800 (PST)
From: Minghua Chen <minghua@eecs.berkeley.edu>
Subject: tcptrace How to compute packet loss rate?
Message-ID: <Pine.SOL.4.44.0302252110570.8581-100000@nima.EECS.Berkeley.EDU>

Hi,

I am dumping and analyzing the TCP packets from a fixed host to a mobile
host connected via Verizon wireless network using 1xRTT CDMA data service.
I run tcpdump on the mobile host, and try to DL some file from the
fixed host using FTP service.

I want to collect the packet loss rate information like this :
retransmit packets / total packets sent out * 100%
this is not perfectly equal to the packet loss rate but can give us an
idea on the order of loss rate.

However, when I analyzed the packet loss rate using dump file on sender
side and receiver side, two totally different # appears.

How can I compute roughly the packet loos rate?

Thanks in advance.

Minghua

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