How to add latency on test network ?

[michelcaissie]

Hi ,

I would like to simulate internet latency between a client-server

application.

(adding 200ms)

I tried putting 2 routers back-to-back between them but the only thing i

have

available is two 1720 with a T1 module . And it does not add much

latency.

I look in the available serial interface command , there is a delay

command but

the max delay is about 2 ms .

Does anyone have an idea on how to accomplish my goal ?

thanks

[michelcaissie]

Finaly got the solution , i had to plug the AUX back-to-back not the

T1.

http://www.cisco.com/warp/public/793/access_dial/auxback.html

[rlcarr]

How does this ADD latency at a 200ms level? All you've really done is lower your bandwidth. You are just requiring more packets and app turns to give you the appearance of latency. The Aux port isn't going to let you control latency.

I would recommend purchasing a T1 simulator.

Ron

[tim_quinn]

Definitely the best way we have found (free) to simulate WAN connections is by using NIST Net. In addition to intriducing latency, yuou can intriduce other things such as packet loss, etc.

Here is a link

http://snad.ncsl.nist.gov/itg/nistnet/

Good Luck

[smif101]

The only way that you are going to get a 200ms delay is to purchase a satelite simulator. That is what I assume you are wanting to simulate in your test network. The delay command is nothing but for using in routing protocols and adding packet loss to the network isn't going to add delay either, its just going to add packet loss. Just to a serch for the device and you will find a lot of companies that sell them.