[THIN] Re: How to Simulate High Latency/Low Bandwidth
- From: kenw@xxxxxxxx
- To: thin@xxxxxxxxxxxxx
- Date: Mon, 05 Jul 2004 07:58:03 -0600
>Anyone know of any free software to simulate high latency or low
>bandwidth
>to a particular machine?
For high latency, I use dummynet. Bonus: it's free. See:
http://ai3.asti.dost.gov.ph/sat/dummynet.html
Here's a description:
"dummynet is a flexible tool for bandwidth management and for testing
networking protocols. It is implemented in FreeBSD but is easily portable
to other protocol stacks. There is also a one-floppy version of FreeBSD
which includes dummynet and a lot of other goodies, see below. It works by
intercepting packets in their way through the protocol stack, and passing
them through one or more pipes which simulate the effects of bandwidth
limitations, propagation delays, bounded-size queues, packet losses, etc."
I use a boot floppy with a small old PC with two NICs.
For low bandwidth, I use a serial link between two PCs and implement a
null-modem network connection. Baud rate = bandwidth.
/kenw
Ken Wallewein
K&M Systems Integration
Phone (403)274-7848
Fax (403)275-4535
kenw@xxxxxxxx
www.kmsi.net
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