[c-nsp] TCP throughput /WAN delay simulation with back to back routers

[Ian Henderson]

On Wed, 19 Aug 2009, Thilak T wrote:

> I am trying to test TCP throughput with different variables. I want to 
> simulate a delay of aprox 45msec between two test PCs connected two bat 
> to back routers . How do we introduce an artificial delay where in the 
> actual delay is on 2-3 msec.Using cisco routers.?

Riverbed introduced us to the Network Nightmare www.networknightmare.net. 
Its a neat little appliance using the FreeBSD dummynet stuff, without 
having to maintain it. Incredibly easy to use, although its pricey if 
you've got the time/expertise to setup dummynet.

Their website is truly awful, but ordering/delivery was fast/easy.

Rgds,



- I.