Appendix I. WAN Configuration

This chapter examines the configuration details for how to configure a few of the types of wide-area networks (WANs) covered in Chapter 4, “Fundamentals of WANs,” and Chapter 22, “WAN Concepts.” The first section of this chapter examines leased-line configuration using both High-Level Data Link Control (HDLC) and Point-to-Point Protocol (PPP). The second section of the chapter shows how to configure the Layer 3 features required for an Internet access router to connect to the Internet, specifically Dynamic Host Configuration Protocol (DHCP) and Network Address Translation/Port Address Translation (NAT/PAT). However, the configuration in the second half of the chapter does not use the command-line interface (CLI), but instead focuses on using the web-based router Security Device Manager (SDM) interface.