Implementing IP quality of service, step 2

Step 2: Classifying traffic based on the requirements identified

The definition of traffic classes does not need to be general; it must include the traffic (application) types that were observed during the network audit step. You can classify tens or even hundreds of traffic variations into very few classes. The defined traffic classes must be in line with business objectives. The traffic or application types within the same class must have common requirements

IP quality of service IP quality of service is becoming increasingly important as customers add bandwidth-intensive services and applications to their networks. Value-added resellers (VARs) and systems integrators who can troubleshoot and improve sub-optimal performance in a converged network environment have marketable skills. This excerpt from CCNP ONT Official Exam Certification Guide defines quality of service and the three steps to implementing it.

and business requirements. The exceptions to this rule are the applications that have not been identified or scavenger-class traffic.

Voice traffic has specific requirements, and it is almost always in its own class. With Cisco LLQ, VoIP is assigned to a single class, and that class uses a strict priority queue (a priority queue with strict maximum bandwidth) on the egress interface of each router. Many case studies have shown the merits of using some or all of the following traffic classes within an enterprise network:

Scavenger traffic class -- This class of applications will be assigned into one class and be given limited bandwidth. This class is considered inferior to the best-effort traffic class. Peer-to- peer file sharing applications are put in this class.

Go to Step 3: Defining policies for each traffic class

Reproduced from the book CCNP ONT Official Exam Certification Guide Copyright [2007], Cisco Systems, Inc. Reproduced by permission of Pearson Education, Inc., 800 East 96th Street, Indianapolis, IN 46240. Written permission from Pearson Education, Inc. is required for all.

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