作者：Nakia Stringfield, Russ White, Stacia McKee
出版日期：May 4, 2007
出版社：Cisco Press
页数：288
ISBN：ISBN-10: 1587052369 ISBN-13: 978-1587052361
文件格式：CHM

Product DescriptionCisco Express Forwarding

Understanding and troubleshooting CEF in Cisco routers and switches

Nakia Stringfield, CCIE® No. 13451
Russ White, CCIE No. 2635
Stacia McKee

How does a router switch a packet? What isthe difference between routing a packet, switching a frame, and packetswitching? What is the Cisco® Express Forwarding (CEF) feature referredto in Cisco documentation and commonly found in Cisco IOS® commands?CEF is a general term that describes the mechanism by which Ciscorouters and Catalyst® switches packet-switch (route) frames. CEF isfound in almost all Cisco routers and Catalyst switches, andunderstanding how CEF operates can improve the performance,scalability, and efficiency of your network.

Cisco Express Forwardingdemystifies the internal workings of Cisco routers and switches, makingit easier for you to optimize performance and troubleshoot issues thatarise in Cisco network environments. This book addresses commonmisconceptions about CEF and packet switching across various platforms,helping you to improve your troubleshooting skills for CEF- andnon-CEF-related problems.

The first part of the book provides anoverview of packet-switching architectures and CEF operation andadvanced features. It also covers the enhanced CEF structure andgeneral troubleshooting. The second part of the book provides casestudies that focus on the common topics that have been problematic forcustomers and those supporting Cisco networks.

Full of practical examples andconfigurations, this book draws on years of experience to help you keepyour Cisco networks running efficiently.

Nakia Stringfield, CCIE® No. 13451, is anetwork consulting engineer for Advanced Services at Cisco, supportingtop financial customers with network design and applying bestpractices. She was formerly a senior customer support engineer for theRouting Protocols Technical Assistance Center (TAC) teamtroubleshooting issues related to CEF and routing protocols. Nakia hasbeen with Cisco for more than six years, previously serving as atechnical leader for the Architecture TAC team.

Russ White, CCIE No. 2635, is a PrincipleEngineer in the Routing Protocol Design and Architecture team at Cisco.He is a member of the IETF Routing Area Directorate, co-chair of theRouting Protocols Security Working Group in the IETF, a regular speakerat Cisco Networkers, a member of the CCIE Content Advisory Group, andthe coauthor of six other books about routing and routing protocols,including Optimal Routing Design from Cisco Press. Russ primarily worksin the development of new features and design architectures for routingprotocols.

Stacia McKee is a customer support engineerand technical leader of the Routing Protocols Technical AssistanceCenter (TAC) team. This team focuses on providing post-sales support ofIP routing protocols, MPLS, QoS, IP multicast, and many other Layer 3technologies. Stacia has been with Cisco for more than six years,previously serving as a technical leader of the Architecture TAC teamand a member of the WAN/Access TAC team.

Learn the key features of packet-switching architecturesUnderstand the basics of the CEF architecture and operationExamine the enhanced CEF structure, which improves scalabilityLearn how to troubleshoot in software-switching environmentsUnderstand the effect of CEF on a Cisco Catalyst 6500 Supervisor 720Configure and troubleshoot load sharing with CEFEvaluate the effect of CEF in an MPLS VPN environmentReview CEF design considerations that impact scalability
This book is part of the NetworkingTechnology Series from Cisco Press®, which offers networkingprofessionals valuable information for constructing efficient networks,understanding new technologies, and building successful careers.

Category: Networking
Covers: Routing and Switching


1587052369
About the Author
Nakia Stringfield, CCIE No. 13451,is a network consulting engineer for Advanced Services at Cisco inResearch Triangle Park, North Carolina, supporting top financialcustomers with network design and applying best practices. She wasformerly a senior customer support engineer for the Routing ProtocolsTechnical Assistance Center (TAC) team, troubleshooting issues relatedto CEF and routing protocols. Nakia has been with Cisco for more thansix years, previously serving as a technical leader for theArchitecture TAC team. She has given training courses on CEF operationand troubleshooting for internalemployees. Nakia also worked for ayear with IBM Global Services LAN Support in Research Triangle Park,North Carolina. Nakia attended North Carolina State University andcompleted her bachelor of science degree in electrical engineering in1996. She also earned a master of science in computer networkingand computer engineering from North Carolina State University in 2000.
Russ White, CCIE No. 2635, isa member of the Routing Protocol Design and Architecture Team at Cisco,Research Triangle Park, North Carolina. He is a member of the InternetEngineering Task Force (IETF) Routing Area Directorate, a cochair ofthe Routing Protocols Security Working Group in the IETF, a regularspeaker at Networkers, a member of the Cisco Certified InternetworkExpert (CCIE) Content Advisory Group, a member of the core teamdeveloping the new Cisco Design certification, a regular contributor tothe Internet Protocol Journal, and the coauthor of six other books about routing and routing protocols, including Optimal Routing Design, from Cisco Press. Russ primarily works in the development of new features and design architectures for routing protocols.
Stacia McKee is a customersupport engineer and technical leader of the Routing Protocols (RP)Technical Assistance Center (TAC) team at Cisco in research TrianglePark, North Carolina. This team focuses on providing postsales supportof IP routing protocols, Multiprotocol Label Switching (MPLS),quality of service (QoS), IPmulticast, and many other Layer 3 technologies. Stacia has been withCisco for more than six years, previously serving as a technical leaderof the Architecture TAC team and member of the WAN/Access TAC team. Shehas created and presented training on packet switching, routerarchitecture, and troubleshooting for internal employees. Stacia hasalso been a technical editor and reviewer of Cisco.com technicaldocumentation, mainly in router and IOS architecture and IP routingprotocols technologies. She works closely with the IP Routing and IPServices groups within the CiscoNetwork Software and SystemsTechnology Group (NSSTG) on customer problems and early field trials.In 2000, Stacia completed her bachelor of science degree in computerinformation systems, bachelor of science degree in businessadministration, and bachelor of arts degree in computer science at theCollege of Charleston in Charleston, South Carolina.