chapter 3 overview.ppt - leamanobjectives describe the fundamental concepts of frame relay...
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Frame Relay
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1Version 4.0
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 Relay operation, Frame Relay implementation requirements, Frame Relay maps, and LMI operation.
� Configure a basic Frame Relay PVC including configuring and troubleshooting Frame Relay on a router serial interface and configuring a static Frame Relay map.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2
� Describe advanced concepts of Frame Relay technology in terms of Enterprise WAN services including Frame Relay sub-interfaces, Frame Relay bandwidth and flow control.
� Configure an advanced Frame Relay PVC including solving reachability issues, configuring Frame Relay sub-interfaces, verifying and troubleshooting Frame Relay configuration.
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Describe the Fundamental Concepts of Frame Relay Technology
� Describe how Frame Relay is used to provide WAN services to the Enterprise
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Describe the Fundamental Concepts of Frame Relay Technology
� Describe how Frame Relay uses virtual circuits to carry packets from one DTE to another
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Describe the Fundamental Concepts of Frame Relay Technology
� Explain how Frame Relay encapsulation works
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Describe the Fundamental Concepts of Frame Relay Technology
� Describe the types of topologies that are used for implementing Frame Relay in different environments
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Describe the Fundamental Concepts of Frame Relay Technology
� Describe how a router attached to a Frame Relay network uses LMI status messages and inverse ARP queries 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 serial interface
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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 Relay Technology
� Explain the reachability issues associated with the Frame Relay NBMA topology
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Describe Advanced Concepts of Frame Relay Technology
� Describe how to implement bandwidth control in the Frame Relay technology
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Describe Advanced Concepts of Frame Relay Technology
� Describe how to implement flow control in Frame Relay technology
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Configure an Advanced Frame Relay PVC
� Explain the steps to configure point-to-point subinterfaces on a physical interface
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Configure an Advanced Frame Relay PVC
� Describe the commands used for verifying Frame Relay operation
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Configure an Advanced Frame Relay PVC
� Describe the steps for troubleshooting a Frame Relay configuration
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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 model and encapsulates data packets in a frame relay frame
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 16
and 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 IP addresses
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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 multiple VCs are placed on a single physical interface
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 17
VCs are placed on a single physical interface
� Factor affecting frame relay configuration
–How service provider has their charging scheme set up
� Frame relay flow control
–DE
–FECN
–BECN
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Summary
� The following commands can be used to help verify frame relay configuration
–Show interfaces
–Show frame-relay lmi
–Show frame-relay pvc ###
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–Show frame-relay pvc ###
–Show frame-relay map
� Use the following command to help troubleshoot a frame relay configuration
–Debug frame-relay lmi
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