In message <Pine.NEB.4.21.0101092101170.14151-100000@kudra.yubyub.net>, Yubyub 
bird writes:
>I am in need of a way to _introduce_ delays in a network.  Basically, we
>have to test a few different protocols and how they react to added
>latencies at high bandwidth.
>
>Every piece of networking knowledge that I know of relates somehow to
>decreasing latency and delays.  Is there a piece of functionality in
>NetBSD (such as a traffic shaper) that will allow me to introduce a delay
>while maintaining a high bandwidth?  Possibly with adjustable bandwidth
>(so I could, say, emulate an international E1 or such)?
>
It would be really nice (hint, hint) if someone would port the dummynet 
code from FreeBSD -- I think it would do exactly what you want.

Failing that, it should be easy enough to write something using the 
tunnel driver.

		--Steve Bellovin