Re: Network impairment generator software?

[Jeff Morriss <jeff.morriss.ws () gmail com>]

RUOFF, LARS (LARS)** CTR ** wrote:
> Hello,
>  
> anyone knows a good network impairment generator software?
> One that is using a PC with two NICs, on which you relay packets from 
> one NIC to the other with user defined packet loss, jitter etc.
> I used to use Netdisturb some time back.
> Does anybody know something else? Possibly free software?
> Windows or Linux based.

I used NistNet some years ago but found it too unstable (machine was 
hanging/crashing all the time).

Since then I've used FreeBSD's ipfw dummynet/traffic shaper:

http://www.freebsd.org/cgi/man.cgi?query=ipfw&sektion=8&apropos=0&manpath=FreeBSD+8.1-RELEASE#TRAFFIC_SHAPER_(DUMMYNET)_CONFIGURATION


It's rock solid in my experience.  But, it has limited functionality 
compared to some other products (e.g., you can't do jitter).  But that 
fit's my needs: I generally want to control packet loss and occasionally 
mis-order packets.


I think my company also uses this product:

http://www.shunra.com/ve-cloud

Complaints that I know of is that it's not free and (at least in 
the--probably old--version we have) it's not easy to automate tests with it.
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