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Establishing Serial

Point-to-Point ConnectionsModule 7

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2002, Cisco Systems, Inc. All rights reserved. ICND v2.07-3

Objectives

Upon completing this module, you will be able to:

Use Cisco IOS commands to configure serial interfacesusing HDLC and PPP encapsulation for leased-line

connections, given a functioning router Use show commands to identify anomalies in HDLC and

PPP encapsulation for leased-line connections, given anoperational router

Use debug commands to identify events and anomaliesin HDLC and PPP encapsulation for leased-lineconnections, given an operational router

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2002, Cisco Systems, Inc. All rights reserved. 4

Wide-Area Networking Review

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2002, Cisco Systems, Inc. All rights reserved. ICND v2.07-5

Objectives

Upon completing this lesson, you will be able to:

Describe leased-line, circuit-switched, andpacket-switched networks

Define terms used by WAN service providers includingCPE, demarcation, local-loop, CO, and toll network

Identify the five serial standards supported by Ciscodevices

Describe the major WAN protocols including HDLC,PPP, SLIP, X.25, Frame Relay, and ATM

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WAN Overview

WANs connect remote sites.

Connection requirements vary depending onuser requirements, cost, and availability.

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WAN Connection Types: Layer 1

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Provider assigns connection parametersto subscriber.

Interfacing BetweenWAN Service Providers

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Serial Point-to-Point Connections

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Summary

A WAN makes data connections across a broadgeographic area so that information can beexchanged between distant sites.

Some of the WAN connection types available areleased line, circuit-switched, and packet-switched.

Cisco routers support the EIA/TIA-232, EIA/TIA-449,V.35, X.21, and EIA/TIA-530 standards for serialconnections.

To encapsulate data for crossing a WAN link, youcan choose from a variety of Layer 2 protocols,including HDLC, PPP, SLIP, X.25/LAPB, Frame Relay,and ATM.

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