Simulate latency delay in a lab setup

[amerutoji]

Hello,

I have a few routers in a lab setting connected via crossover serial lines (T1).

I am trying to test some QoS policies and was wondering if there is a way to somehow artificially introduce latency on a direct back-to-back cable serial connection, to make a "circuit" look like a long distance WAN?

I've heard about some specialized hardware that can create different latencies, errors, jitter etc. I don't know if Cisco has anything like that (hardware or IOS)?

Thanks,

Amer.

[Harold Ritter]

I do not believe that we have a product that does that. There is many different solution available out there though.

Hope this helps,

[amerutoji]

Thanks for a reply.

Do you know of any product like that, that can be used for serial lines in particular?

[scottmac]

Check out a product called "The Cloud" by Shunra. It allows you to take a snapshot of network conditions and "playback" traffic through those conditions.

It also allow you to tweak the conditions to throw in things like latency, several kinds of congestion, and errored line conditions.

Check out a Google of "shunra" ... there's some articles and a link to the company.

I was told once or twice that there's a way to tweak a Linux kernel to do latency simulation too, but I don't remember any of the details.

("latency simulator" got a few hits too)

Good Luck

Scott