From: darbyweaver@yahoo.com
Date: Wed May 03 2006 - 10:07:26 ART
Here's a link that might come in handy:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/hqos_c/part05/ch05/index.htm
A practical example that I have used in production is to use a device such as Packeteer in discovery mode to quickly identify traffic and then create associated rulesets thoughout the network based on those findings.
From a pure Cisco-based Solution, NBAR can be used to do this as well. For me the latter solution is a shortcut to creating End-to-End QoS rules that can be deployed effectively in dealing with issues like worms in a very quick and efficient manner.
I do advise playing with it a bit first.
The team at NMC also had a very nice set of tools for creating scenarios and testing those rules as well. Bruce is a diehard QoS fan... :)
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Configuration Tasks
The NBAR feature has two components: one component monitors applications traversing a network, and the other that classifies traffic by protocol.
In order to monitor applications traversing a network, Protocol Discovery needs to be enabled.
The ability to classify traffic by protocol using NBAR and then applying QoS to the classified traffic is configured using the Modular QoS CLI.
The Modular QoS CLI is a CLI structure that allows users to create traffic policies and attach these policies to interfaces. A traffic policy contains a traffic class and one or more QoS features. A traffic class is used to classify traffic, while the QoS features in the traffic policy determine how to treat the classified traffic.
Modular QoS CLI configuration includes the following three steps
Step 1 Define a traffic class with the class-map command.
Step 2 Create a traffic policy by associating the traffic class with one or more QoS features (using the policy-map command).
Step 3 Attach the traffic policy to the interface with the service-policy command.
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