CCIP BGP (642-661) Quick Learning Modules

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

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Introducing BGP Confederations

This QLM describes the function of confederations in a BGP environment. After completing this lesson, you should be able to:

· Describe iBGP full-mesh requirements when using a transit AS.

· Explain how to use BGP confederations to split an autonomous system into a series of smaller autonomous systems.

· Describe autonomous system path propagation in BGP confederations.

· Explain autonomous system path attribute processing in an autonomous system that contains BGP confederations.

· Explain the properties of intraconfederation eBGP sessions.

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Introducing Route Reflectors

Upon completing this lesson, you should be able to:

· Describe the function of route reflectors in a BGP environment:

· Explain the need for BGP route reflectors in BGP transit backbones

· Explain how route reflectors modify traditional IBGP split-horizon rules

· Explain the benefits of deploying redundant route reflectors

· Explain how route reflector clusters prevent loops in the deployment of route reflectors in redundant configurations

· Describe additional route reflector mechanisms designed to prevent routing loops

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Understanding BGP Path Attributes

Upon completing this module, you should be able to do the following:

· List BGP path attributes and the functionality of each attribute

· Describe the concept of BGP path attributes

· Explain the difference between mandatory and discretionary well-known BGP attributes

· Explain the difference between nontransitive and transitive optional BGP attributes

· Describe the functionality of the AS-path attribute

· Describe the functionality of the next-hop attribute

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