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8/9/2019 Exploration Accessing WAN Chapter3
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE I Chapter 6 1
Frame Relay
Accessing the WAN Chapter 3
8/9/2019 Exploration Accessing WAN Chapter3
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 2
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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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 3
Describe the Fundamental Concepts of FrameRelay Technology
Describe how Frame Relay is used to provide WANservices to the Enterprise
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 4
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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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 5
Describe the Fundamental Concepts of FrameRelay Technology
Explain how Frame Relay encapsulation works
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 6
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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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 7
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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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 8
Configure a Basic Frame Relay PVC
Configure a basic Frame Relay PVC on a router serialinterface
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 9
Configure a Basic Frame Relay PVC
Configure a static Frame Relay map
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 10
Describe Advanced Concepts of Frame RelayTechnology
Explain the reachability issues associated with theFrame Relay NBMA topology
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 11
Describe Advanced Concepts of Frame RelayTechnology
Describe how to implement bandwidth control in theFrame Relay technology
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 12
Describe Advanced Concepts of Frame RelayTechnology
Describe how to implement flow control in Frame Relaytechnology
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 13
Configure an Advanced Frame Relay PVC
Explain the steps to configure point-to-pointsubinterfaces on a physical interface
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 14
Configure an Advanced Frame Relay PVC
Describe the commands used for verifying Frame Relayoperation
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 15
Configure an Advanced Frame Relay PVC
Describe the steps for troubleshooting a Frame Relayconfiguration
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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 16
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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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 17
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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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 18
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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2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 19
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