[ns] Synthesis of scripts and/or traffic

[Bob McConnell]

Has anyone written any scripts to create an emulation from a physical
description of the network to be emulated or to generate traffic files
for an emulation run?

I have ns-allinone-2.28 installed on a FreeBSD 5.4 system at 10.3.1.253.
The application server I need to exercise is at 10.1.5.169. I want to
emulate a router and four subnets behind the actual computer, feeding it
either from a pcap file or a random traffic generator. Those subnets are
10.3.2.0, 10.3.3.0, 10.3.4.0 and 10.3.5.0. There should be an average of
50 computers on each subnet initially, increasing to at least 200 each
over a series of test runs. Each node will open a socket to the
application server and occasionally send a sequence of two messages. The
primary purpose is to test the TCP stack and socket library on the
server to verify they can handle that many open connections. A secondary
goal is to determine the maximum sustainable throughput of the server in
a variety of configurations.

Setting all of this up manually is going to take a lot of time. I am
looking for shortcuts, templates, scripts, etc. to take over most of the
manual labor of defining and configuring the nodes and creating the
traffic.

Thank you,

Bob McConnell
Principal Communications Programmer
The CBORD Group, Inc.
61 Brown Road
Ithaca NY, 14850
Phone 607 257-2410
FAX 607 257-1902
Email rvm at cbord.com
Web www.cbord.com