Chapter 29. Configuring Serial Encapsulation: HDLC and PPP

This chapter provides information and commands concerning the following topics:

Configuring HDLC encapsulation on a serial line

Configuring Point-to-Point Protocol (PPP) on a serial line (mandatory commands)

Configuring Point-to-Point Protocol (PPP) on a serial line (optional commands), including those commands concerning the following


Link quality



Verifying and troubleshooting a serial link/PPP encapsulation

Configuration example: PPP with CHAP authentication

Configuring HDLC Encapsulation on a Serial Line



HDLC is the default ...

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