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Date:      Fri, 17 Jul 1998 11:42:22 -0400
From:      "Swanton, George" <gswanton@biw.com>
To:        "'freebsd-questions@FreeBSD.ORG'" <freebsd-questions@FreeBSD.ORG>
Subject:   simulating WAN latency
Message-ID:  <8340CF4C9BFED01188A200A0C969E9971DAA71@NT_LPD17_EXCH>

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Hello, 

Travelling as a stranger in the strange land of WindowsNT I have encountered
a 
problem I'm hoping my faithful friend FreeBSD can help me solve. 

We have an application demonstrating less than impressive performance over a
wide 
area link. There is a configuration I belive will help but for various
reasons am unable to 
test without undo difficulty. I would like to test the solution locally
using a FreeBSD 
machine to introduce the ~80ms latency of the 512K WAN into a local TCP
link. 

I am writing to request suggestions as to how to procede. I am considering
tweaking the 
system to buffer packets and forward them after a specified delay, or
perhaps dropping 
incoming packets with probability P. A pointer to an existing package or
related 
document would of course be highly desirable. 

I am not much acquainted with TCP/IP networking internals but am an
experienced 
Unix/C programmer willing to 'dive in and break things'. 

Any feedback is much appreciated. 
Thanks 
gps 
  

George P Swanton
CSC/BIW-LPD17
(207)-442-3021
gswanton@biw.com



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