Cisco s TAC team<197>the elite of troubleshooting professionals<197>have reviewed and revised the first edition of Internetwork Troubleshooting Handbook to ensure that today s internetworking professionals will be able to solve everyday problems in their networks. This book provides the information necessary to troubleshoot many problems commonly encountered in internetworks using Cisco hardware and software products, enabling readers to diagnose and resolve specific problems common to every network type. It will help readers reduce downtime, improve network performance, and enhance network reliability using proven troubleshooting solutions. Readers will be able to make intelligent, timely, and cost-effective networking decisions for their networking environments. Each section of the book is devoted to problems common to a specific protocol or topology. Sections are subdivided into symptoms, descriptions of environments, diagnosing and isolating problem causes, and problem-solution summaries.