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List:       tcpreplay-users
Subject:    Re: [Tcpreplay-users] A general question regarding tcpreplay
From:       Aaron Turner <synfinatic () gmail ! com>
Date:       2010-03-23 20:41:57
Message-ID: 1ca1c1411003231341g1489d171n6b2b4b105a206ba7 () mail ! gmail ! com
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On Tue, Mar 23, 2010 at 1:13 PM, Guanyao Huang <gyhuang@ucdavis.edu> wrote:
> Hi
> I have a very general question regarding tcpreplay a pcap trace. When
> replaying a trace, what is the actual time interval between two
> different packets when you specifying a replay rate. Suppose
> originally two intervals are 0.1s and 0.2s. If I want to replay at
> lower rate, the intervals becomes 1s and 2s, or, will it become 1.5s
> and 1.5s? Will the interval be uniform after I specifying a larger
> rate, or, will it be according to the original interval?
> Thanks.

Depends on what options you use.  You can specify a hard coded rate in
terms of packets/sec or Mbps, or use a multiplier to cause it to run X
times faster/slower.  Ie:  --multiplier=0.1 would cause it to run 10x
slower (0.1 sec becomes 1sec and 0.2sec -> 2sec).

This is all documented in the man pages and online manual on the
tcpreplay website:

http://tcpreplay.synfin.net/wiki/tcpreplay#Replayingatdifferentspeeds


-- 
Aaron Turner
http://synfin.net/
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix & Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
    -- Benjamin Franklin
"carpe diem quam minimum credula postero"

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