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Frame Relay

Accessing the WAN Chapter 3

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Objectives Describe the fundamental concepts of Frame Relay technology

in terms of Enterprise WAN services including Frame Relayoperation, Frame Relay implementation requirements, FrameRelay maps, and LMI operation.

Configure a basic Frame Relay PVC including configuring and

troubleshooting Frame Relay on a router serial interface andconfiguring a static Frame Relay map.

Describe advanced concepts of Frame Relay technology interms of Enterprise WAN services including Frame Relay sub-interfaces, Frame Relay bandwidth and flow control.

Configure an advanced Frame Relay PVC including solvingreachability issues, configuring Frame Relay sub-interfaces,verifying and troubleshooting Frame Relay configuration.

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Describe the Fundamental Concepts of FrameRelay Technology

Describe how Frame Relay is used to provide WANservices to the Enterprise

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Describe the Fundamental Concepts of FrameRelay Technology

Describe how Frame Relay uses virtual circuits to carrypackets from one DTE to another

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Describe the Fundamental Concepts of FrameRelay Technology

Explain how Frame Relay encapsulation works

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Describe the Fundamental Concepts of FrameRelay Technology

Describe the types of topologies that are used forimplementing Frame Relay in different environments

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Describe the Fundamental Concepts of FrameRelay Technology

Describe how a router attached to a Frame Relaynetwork uses LMI status messages and inverse ARPqueries to map VCs to layer 3 network IP Addresses

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Configure a Basic Frame Relay PVC

Configure a basic Frame Relay PVC on a router serialinterface

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Configure a Basic Frame Relay PVC

Configure a static Frame Relay map

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Describe Advanced Concepts of Frame RelayTechnology

Explain the reachability issues associated with theFrame Relay NBMA topology

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Describe Advanced Concepts of Frame RelayTechnology

Describe how to implement bandwidth control in theFrame Relay technology

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Describe Advanced Concepts of Frame RelayTechnology

Describe how to implement flow control in Frame Relaytechnology

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Configure an Advanced Frame Relay PVC

Explain the steps to configure point-to-pointsubinterfaces on a physical interface

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Configure an Advanced Frame Relay PVC

Describe the commands used for verifying Frame Relayoperation

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Configure an Advanced Frame Relay PVC

Describe the steps for troubleshooting a Frame Relayconfiguration

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Summary Frame relay is the most widely used WAN technology

because it:Provides greater bandwidth than leased line

Reduces cost because it uses less equipment

Easy to implement

Frame relay is associated with layer 2 of the OSI modeland encapsulates data packets in a frame relay frame

Frame relay is configured on virtual circuits

These virtual circuits may be identified by a DLCI

Frame relay uses inverse ARP to map DLCI to IPaddresses

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Summary

Configuring frame relay requires

Enable frame relay encapsulation

Configuring either static or dynamic mapping

Considering split horizon problems that develop when multipleVCs are placed on a single physical interface

Factor affecting frame relay configuration

How service provider has their charging scheme set up

Frame relay flow controlDE

FECN

BECN

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Summary

The following commands can be used to help verifyframe relay configuration

Show interfaces

Show frame-relay lmi

Show frame-relay pvc ###

Show frame-relay map

Use the following command to help troubleshoot a

frame relay configurationDebug frame-relay lmi

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