ccna 4 v3.0 module 5 frame relay

1© 2003, Cisco Systems, Inc. All rights reserved.

CCNA 4 v3.0 Module 5 Frame Relay

222© 2003, Cisco Systems, Inc. All rights reserved.

Purpose of This PowerPoint

• This PowerPoint primarily consists of the Target Indicators (TIs) of this module in CCNA version 3.0.

• It was created to give instructors a PowerPoint to take and modify as their own.

• This PowerPoint is:

NOT a study guide for the module final assessment.

NOT a study guide for the CCNA certification exam.

• Please report any mistakes you find in this PowerPoint by using the Academy Connection Help link.

333© 2003, Cisco Systems, Inc. All rights reserved.

To Locate Instructional Resource Materials on Academy Connection:

• Go to the Community FTP Center to locate materials created by the instructor community

• Go to the Tools section

• Go to the Alpha Preview section

• Go to the Community link under Resources

• See the resources available on the Class home page for classes you are offering

• Search http://www.cisco.com

• Contact your parent academy!

444© 2003, Cisco Systems, Inc. All rights reserved.

Objectives

• Frame Relay concepts

• Configuring Frame Relay

555© 2003, Cisco Systems, Inc. All rights reserved.

Frame Relay Operation

666© 2003, Cisco Systems, Inc. All rights reserved.

Frame Relay Switches

777© 2003, Cisco Systems, Inc. All rights reserved.

Frame Relay Concepts

888© 2003, Cisco Systems, Inc. All rights reserved.

Local Significance of DLCIs

The data-link connection identifier (DLCI) is stored in the Address field of every frame transmitted.

999© 2003, Cisco Systems, Inc. All rights reserved.

Terminology

• The connection through the Frame Relay network between two DTEs is called a virtual circuit (VC).

• Virtual circuits may be established dynamically by sending signaling messages to the network. In this case they are called switched virtual circuits (SVCs).

101010© 2003, Cisco Systems, Inc. All rights reserved.

Frame Relay Stack Layered Support

111111© 2003, Cisco Systems, Inc. All rights reserved.

Frame Relay Functions

121212© 2003, Cisco Systems, Inc. All rights reserved.

Bandwidth and Flow Control

Bit counter Example 1

131313© 2003, Cisco Systems, Inc. All rights reserved.

Frame Relay Concepts

141414© 2003, Cisco Systems, Inc. All rights reserved.

LAPF Frame

151515© 2003, Cisco Systems, Inc. All rights reserved.

Full-Mesh Topology

161616© 2003, Cisco Systems, Inc. All rights reserved.

Frame Relay Mesh

171717© 2003, Cisco Systems, Inc. All rights reserved.

LMI

• Three types of LMIs are supported by Cisco routers:

Cisco — The original LMI extensions

Ansi — Corresponding to the ANSI standard T1.617 Annex D

q933a — Corresponding to the ITU standard Q933 Annex A

181818© 2003, Cisco Systems, Inc. All rights reserved.

Stages of Inverse ARP and LMI Operation #1

191919© 2003, Cisco Systems, Inc. All rights reserved.

Stages of Inverse ARP and LMI Operation #2

202020© 2003, Cisco Systems, Inc. All rights reserved.

Configuring Basic Frame Relay

212121© 2003, Cisco Systems, Inc. All rights reserved.

Configuring a Static Frame Relay Map

222222© 2003, Cisco Systems, Inc. All rights reserved.

Reachability Issues with Routing Updates in NBMA

By default, a Frame Relay network provides nonbroadcast multiaccess (NBMA) connectivity between remote sites. An NBMA environment is treated like other multiaccess media environments, where all the routers are on the same subnet.

232323© 2003, Cisco Systems, Inc. All rights reserved.

Frame Relay Subinterfaces

242424© 2003, Cisco Systems, Inc. All rights reserved.

Configuring Point-to-Point Subinterfaces

252525© 2003, Cisco Systems, Inc. All rights reserved.

Verifying Frame Relay

• The show interfaces command displays information regarding the encapsulation and Layer 1 and Layer 2 status. It also displays information about the following:

The LMI type

The LMI DLCI

The Frame Relay data terminal equipment/data circuit-terminating equipment (DTE/DCE) type

262626© 2003, Cisco Systems, Inc. All rights reserved.

The show frame-relay lmi Command

272727© 2003, Cisco Systems, Inc. All rights reserved.

The show frame-relay pvc Command

282828© 2003, Cisco Systems, Inc. All rights reserved.

The show frame-relay map Command

292929© 2003, Cisco Systems, Inc. All rights reserved.

Troubleshooting Frame Relay

• Use the debug frame-relay lmi command to determine whether the router and the Frame Relay switch are sending and receiving LMI packets properly.