I need to drive up my latency between a link to test an applications behavior. I have multiple routers I could use (1x3825 & 3x2801). I could use traffic shaping, but that doesn't let me input a latency delay in ms between packets... Any other thoughts??? Is there a way to put in latency in a bridge-group?
As you say, traffic shaping is an option and imho would be your best bet here.
You could also alter the MTU of the links, which in turn would increase fragmentation and reduce efficency (thus increasing latency).
Unfortunatly these techniques will only give approximated behaviour and will not produce hard and fast data (e.g. it'll be hard to simulate propogation delay if using disimilar physical mediums). If you need that level of assurance then building a lab that is closely matches the production system may be required.
The trouble you'll face in general is that unless you use a packet generator tuned to simulate your production network, any test you do in isolation will be based on disimilar operating conditions. In which case the best you can hope for is an approximation of behaviour.
Depending on whether you're testing the application itself or its impact on the network you could use a network analysis system (e.g. Smartbits - http://www.spirentcom.com) to introduce a sending delay between packets or simulate general operating conditions.
Again, depending on your test objectives you could also write a TCL script to fluctuate the QoS parameters over time.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.