CCENT/CCNA ICND1 100-105 Official Certification Guide, First Edition

Appendix O. Route Summarization

This appendix was Chapter 21 in the previous edition of the book. Although the ICND1 exam objectives do not explicitly reference the content covered here, the skills and concepts covered are important to have a solid understanding of as a future CCENT or CCNA IT professional.

Route summarization tools allow engineers to advertise one route that replaces several smaller routes, with the new route matching the same range of addresses. Doing so alleviates some of the waste: wasted effort, bandwidth, RAM, and CPU.

This appendix first examines manual route summarization concepts. The concepts rely on math that uses the same principles as subnetting math, and it relies on a good subnetting plan that assigns subnets in ...