© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE I Chapter 6 1 Point-to-Point Protocol (PPP) Accessing the WAN – Chapter 2
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 2 Objectives Describe: the fundamental concepts of point-to-point serial communication including: o TDM, o demarcation point, o DTE-DCE functions, HDLC encapsulation o serial interface troubleshooting.
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 3 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).
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 4 Objectives Configure PPP on a serial interface – enabling PPP encapsulation, verifying the PPP connection troubleshooting encapsulation problems.
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 5 Objectives Configure PPP authentication - explaining PAP and CHAP authentication protocols, configuring PPP authentication using: o PAP and CHAP, o troubleshooting PPP authentication problems.
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 6 Fundamental Concepts of Point-to-Point Serial Communication The basis of WAN technologies
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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 9 Point-to-Point Serial Communication TDM
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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 14 Point-to-Point Serial Communication Demarcation point relative to customer and service provider networks
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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 29 Describe the Fundamental Concepts of Point-to-Point Serial Communication When and how to configure HDLC encapsulation on a router
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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 33 Describe Point-to-Point Concepts PPP
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 34 Describe Point-to-Point Concepts Layers of the PPP architecture
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 35 Describe Point-to-Point Concepts Functions of each layer of PPP architecture
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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 38 Describe Point-to-Point Concepts The Purpose and format of each field in a PPP frame
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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 41 Describe Point-to-Point Concepts The three phases of PPP session establishment
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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 46 Describe Point-to-Point Concepts The role of the LCP in PPP
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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 72 Configure PPP on a Serial Interface
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 73 Configure PPP on a Serial Interface Show commands
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 74 Configure PPP on a Serial Interface Explain the output of the debug ppp command
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 75 Configuring PPP with Authentication Differentiate between PAP and CHAP
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 76 Configuring PPP with Authentication
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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 78 Configuring PPP with Authentication
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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 94 PPP Summary Widely used WAN protocol Provides multi-protocol LAN to WAN connections Session establishment – 4 phases Link establishment Link quality determination Network layer protocol configuration negotiation Link termination WAN Encapsulations –HDLC default encapsulation –PPP
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 95 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
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 96 ENDEND END