Router QoS Configuration

[JohnTylerPearce]

Hey, How do you police traffic to a customer so they have forinstnace only 20Mbps with no bursting off of a specific interface.

police bps burst-normal burst-maxconform-action action exceed-action action violate-actionaction

I was wondering if you have to do all of that configuration or just what you need. My QoS skills aren't the best.

I'm a bit confused on how they all fit together, because I just want this client to only have 20 Mbps.

[SOcchiogrosso · Accepted solution]

Here a decent link for configuring Policing

http://www.cisco.com/en/US/docs/ios/12_2/qos/configuration/guide/qcfpoli_ps1835_TSD_Products_Configuration_Guide_Chapter.html

Are you looking to police traffic or shape traffic? Policing drops excess traffic where-as shaping will queue it.

[JohnTylerPearce]

Thanks for the information. I believe the rate-limit command will do what we want it to do.

From my understanding, you configure rate-limit by doing the following.

rate-limit bps normal-burst max-burst

So for instnace

rate-limit 20000000 10000000 5000000

So, this would allow him bursts of 1000000 and if there arnt enough tokens in the bucke it will borrow form the max burst.

I believe setting it that way will do the trick. I also, understand about the conform-action as well, I just didn't include it

in my configuration.

[SOcchiogrosso]

Correct, Rate-limiting will also do what your looking, however policing within the CBWFQ/LLQ model configuration is much more scalable if you have continue added to this configuration, just because you can break everything in class-maps and later on mark traffic for addition priorities in the same service-policy for when you addition QoS parameters later on.

But if your looking to rate-limit and nothing more you are good to go.