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Point-to-Point Protocol (PPP)

Accessing the WAN – Chapter 2

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Objectives

Describe:

the fundamental concepts of point-to-point serial communication including:o TDM, o demarcation point, o DTE-DCE functions, HDLC encapsulationo serial interface troubleshooting.

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Objectives

Describe:

PPP concepts –

PPP layered architecture,

PPP frame structure,

PPP session establishment,

multiprotocol encapsulation support,

link control protocol (LCP),

network control protocol (NCP),

Internet Protocol Control Protocol (IPCP).

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Objectives

Configure PPP on a serial interface –

enabling PPP encapsulation,

verifying the PPP connection

troubleshooting encapsulation problems.

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Objectives

Configure PPP authentication -

explaining PAP and CHAP authentication protocols,

configuring PPP authentication using:o PAP and CHAP, o troubleshooting PPP authentication problems.

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Fundamental Concepts of Point-to-Point Serial Communication The basis of WAN technologies

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Point-to-Point Serial Communication TDM

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Point-to-Point Serial Communication Demarcation point relative to customer and service

provider networks

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Describe the Fundamental Concepts of Point-to-Point Serial Communication When and how to configure HDLC encapsulation on a

router

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Describe Point-to-Point Concepts PPP

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Describe Point-to-Point Concepts Layers of the PPP architecture

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Describe Point-to-Point Concepts

Functions of each layer of PPP architecture

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Describe Point-to-Point Concepts The Purpose and format of each field in a PPP frame

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Describe Point-to-Point Concepts The three phases of PPP session establishment

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Describe Point-to-Point Concepts The role of the LCP in PPP

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Configure PPP on a Serial Interface

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Configure PPP on a Serial Interface Show commands

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Configure PPP on a Serial Interface Explain the output of the debug ppp command

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Configuring PPP with Authentication Differentiate between PAP and CHAP

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Configuring PPP with Authentication

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Configuring PPP with Authentication

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PPP Summary

Widely used WAN protocol

Provides multi-protocol LAN to WAN connections

Session establishment – 4 phasesLink establishment

Link quality determination

Network layer protocol configuration negotiation

Link termination

WAN Encapsulations–HDLC default encapsulation

–PPP

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PPP Summary

Authentication–PAP

•2 way handshake

–CHAP

•3 way handshake

–Use debug ppp authentication to confirm authentication configuration

Configuration–Done on a serial interface

Show interface commands to display:–LCP state

–NCP state

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END

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