creating controlled latency/jitter

[Gerald Combs]

crash3m wrote:
> I need to test some real time traffic, but I need to create some
> 'interference' to simulate a flaky internet connection.  I am trying
> to create controlled latency so that I can determine at which point
> latency (and jitter) becomes a big problem.  Would this be a job for
> QoS?

I've used NIST Net (http://www-x.antd.nist.gov/nistnet/) in the past,
and it works well.  It doesn't support bridging, however.  If you need
to simulate flakiness at layer 2 you might be able to use FreeBSD's
dummynet(4) driver.  Dunno if there's an equivalent Netfilter module for
Linux.