Chapter 9. Shooting Trouble with HDLC, PPP, ISDN BRI, and Dial Backup

This chapter addresses various CCNP Support WAN topics. It includes scenarios and Trouble Tickets for High-Level Data Link Control (HDLC), Point-to-Point Protocol (PPP), Integrated Services Digital Network Basic Rate Interface (ISDN BRI), and Dial Backup. It is assumed you have internetworking experience particularly with IP and routing protocols in the WAN. You will analyze these WAN technologies individually and together for more practical application. This chapter in combination with the previous chapters prepares you for the next chapter and practical internetwork support where you must integrate various skills and predefined troubleshooting methods to solve numerous issues. ...

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