The Enhanced Interior Gateway Protocol (EIGRP) from Cisco Systems is one of the most widely used intra-domain routing protocols in todayis corporate networks. Although EIGRP is easily configured, the inner workings are generally not well understood. The result: nonoptimized networks that lead to chronic and costly problems requiring time and energy to solve.
EIGRP for IP is a concise, complete, and practical guide to understanding and working with EIGRP. It focuses on EIGRP in the context of IP, although the principles learned from this guide can be applied to the other major network protocols that EIGRP supports, including IPX and AppleTalk.
The book provides an overview of essential concepts, terminology, and EIGRP mechanisms, in addition to a look at the most important configuration options. It examines network design with regard to EIGRPis capabilities, offering concrete tips for specific design issues that arise in EIGRP networks. Also featured is an experience-based guide to EIGRP troubleshooting, with solutions to many commonly encountered problems.
Specific topics covered include:
The foundations of EIGRP, including the Diffusing Update Algorithm (DUAL)
A comparison of EIGRP to other interior gateway routing protocols
Configuring summarization
Standard and extended access distribution lists
Hierarchy and redundancy in network topology
Path selection
Multiple EIGRP autonomous systems
Isolating misbehaving routers
Solving problems with neighbor relationships
Stuck in Active (SIA) routes
Serving as both a complete reference and a practical handbook, EIGRP for IP is an essential resource for network professionals charged with maintaining an efficient, smoothly functioning network.
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Für höhere Schule und Studium
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978-0-321-61855-9 (9780321618559)
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Schweitzer Klassifikation
Alvaro Retana, a Technical Leader in Cisco Systems' Core IP Engineering Department, has first-hand expertise in the development and testing of routing protocols such as IS-IS, OSPF, RIP, EIGRP, and BGP4. Alvaro is CCIE #1609, and serves as an Adjunct Professor in the Department of Electrical and Computer Engineering at Duke University.
Russ White, a Routing Protocols Deployment Engineer at Cisco Systems, is a frequent Networkers speaker on routing protocols and router architecture, and the coauthor of several IETF requests for comments (RFCs). He is well known within and outside Cisco for his routing protocols expertise. Russ is CCIE #2635, and one of the reviewers and question writers for the CCIE written exam.
Don Slice is a Technical Lead on the IOS Network Protocols Deployment and Scalability Team at Cisco Systems, and is an acknowledged expert in EIGRP and other interior routing protocols.
Preface.
1. EIGRP Fundamentals.
Distance Vector and Link State Protocols.
Distance Vector Protocols.
Link State Protocols.
EIGRP Compared to Other Protocols.
EIGRP: The Basics.
Neighbor Relationships.
Reliable Multicast.
Limiting Bandwidth Consumption.
EIGRP's Foundation: DUAL.
The Metric.
A More Practical Example.
Split Horizon and Queries.
Queries with No Feasible Successor.
Where Does the Query End?
Deciding Where to Use EIGRP.
2. EIGRP Configuration.
Starting and Running EIGRP.
The network Command.
The Autonomous System (AS) Number.
Redistribution.
Externals and Internals.
Caveats.
Configuring Summarization.
Autosummarization.
Manual Summarization.
Distribution Lists.
Standard Access Lists as Distribution Lists.
Extended Access Lists as Distribution Lists.
Hello and Hold Timers.
Logging Neighbor Status.
Passive Interface.
Stub Neighbors.
3. EIGRP Network Design.
Network Topology.
Hierarchy.
Redundancy.
Minimizing Query Range.
Summarization.
Route Filtering.
Stub Routers.
Multiple Autonomous Systems.
Multiple Routing Protocols.
Path Selection Issues.
Changing the Metric Components on an Interface.
Offset Lists.
Changing K Values.
Variance.
Asymmetric Routing.
Default Routing Strategy.
WAN and Dial Issues.
Frame Relay and Bandwidth Statements.
Point-to-Point Subinterfaces.
Multipoint Interfaces and Subinterfaces.
Dual-Homed Remotes.
Low-Speed NBMA Links and SIAs.
NBMA and Split Horizon.
Frame-Relay Broadcast Queue.
Dial Backup Strategies.
Redistribution Issues.
General Issues.
Forms of Redistribution.
Administrative Distance.
Source of Redistributed Routes.
Other Design Considerations.
4. EIGRP Troubleshooting.
Problems with Neighbor Relationships.
One-Way Communication between Two Routers.
Unicast-Only between Two Routers.
Multicast-Only between Two Routers.
Overburdened or Dirty Link.
Stuck in Active Routes.
Why Did the Route Go Active?
Why Did the Route Stay Active So Long?
Duplicate Router Ids.
Failure to Converge.
Simplifying the Network.
Isolate Misbehaving Routers.
Diagnose the Event.
Glossary.
Recommended Reading.
Index
