I am interested, what have you got?
Saturating the network is easy. Saturating it with varying packet sizes & patterns is tricky, and it seem like that's what you need to create jitter.
An easier way is to use something like netem or other network impairment tools.
Ben
-- Ben Greear <greearb --at-- candelatech.com> Candela Technologies Inc http://www.candelatech.com