CCVP Qos (642-642) Quick Learning

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The following Quick Learning Modules are focused on a specific lesson or topic from the current QOS curriculum.

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Introduction to Modular QoS CLI

By the end of this module you will be able to:

· Define the purpose and uses of Modular QoS CLI

· Describe the basic functions of class maps, policy maps and service policies

· Describe how to configure class maps, policy maps and service policies using MQC commands

· Monitor class maps, policy maps and service policies using MQC commands

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Congestion Management Configuring CBWFQ and LLQ

By the end of this module you will be able to:

· Explain the purpose, features and benefits of CBWFQ

· Describe Class-based Weighted Fair Queuing (CBWFQ) features and explain how CBWFQ works using a block diagram

· Explain the purpose, features and benefits of Low-Latency Queuing (LLQ)

· Explain how LLQ works using a block diagram and identify situations in which LLQ is most appropriate for providing QoS

· Configure CBWFQ and LLQ to manage congestion.

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Congestion Avoidance Introducing RED and WRED

By the end of this module you will be able to you will be able to:

· Describe RED and how it can be used to prevent congestion

· Describe the elements of a RED traffic profile used to implement the RED packet-dropping strategy

· Describe the different packet drop modes of RED

· Describe the effects of using RED on TCP traffic by comparing TCP traffic flows both before and after the application of RED

· Identify the points in a network where congestion avoidance mechanisms are commonly deployed in enterprise and service provider networks

· Describe WRED and how it can be used to prevent congestion

· Describe the traffic profiles used in WRED implementations

· Identify the Cisco IOS commands required to configure CB-WRED and DSCP-based CB-WRED

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