Simulating network latency in a testbed

I am trying to do an analysis of network latency requirements for a set of Oracle-based client/server applications which will run over national and international WAN circuits (mostly frame-relay). Since we don't have good performance requirements data from the application developer, my organization is preparing to do some performance testing in a testbed environment. I am looking for a device which I could use to insert delays into an ethernet LAN segment between a local client and server. Ideally, this device would allow me to control the duration of delay inserted, so that I could simulate a wide range of WAN/LAN latencies. I am envisioning something as simple as an ethernet repeater  with the ability to set a delay time between the input and output buffers.

Any information on such a device, or an alternative method to simulate network latency in a testbed environment, would be greatly appreciated.

Jeff Paige
Eaton Corporation Received on Fri Jan 31 1997 - 00:00:00 CST