Appendix A. CISCO Routers

It is very important that all network administrators know at least the basics of working with CISCO routers since CISCO is considered the dominant company in this area. Routers of some other manufacturers and also daemon GNU Zebra (http://www.zebra.org/) use similar configuration languages to that which CISCO uses. In this book, we provided examples of not only the configuration of operating systems such as UNIX and Windows, but also of the CISCO configuration language.

CISCO specializes especially in network active elements (boxes) ranging from switches to firewalls. These boxes interest us mostly because of their similar configuration language, and the basics of these boxes are described in this appendix. We will focus exclusively on router configuration. To find out more, visit http://www.cisco.com/ where you can find thousands of pages of complete documentation describing both the hardware and the IOS.

CISCO routers are dedicated boxes that attend to...