Eigrp for Ip: Basic Operation and Configuration

by Retana, Alvaro; White, Russ; Slice, Don

• ISBN13: 9780201657739
• ISBN10: 0201657732
• Format: Paperback
• Copyright: 2000-05-01
• Publisher: Prentice Hall

Summary

Cisco's EIGRP routing protocol is increasingly popular in enterprise IP networks -- but accurate, readable EIGRP documentation is scarce, so many EIGRP networks don't run nearly as well as they might. Now, a team of Cisco network engineers has distilled everything you need to know to implement, operate, and troubleshoot EIGRP successfully into one concise guide! The book begins with EIGRP theory, explaining the basic concepts, terminology, and mechanisms used by EIGRP to provide routing information. Next, the authors introduce each of the most important EIGRP configuration options; and review fundamental network design principles within the framework of EIGRP's capabilities. Along the way, they present practical tips on network architecture, and on addressing common EIGRP network scenarios. The final chapter presents comprehensive troubleshooting guidance on the most common problems encountered in EIGRP network. For all network engineers, designers, and IT professionals working with Cisco's EIGRP protocol; and for anyone studying for CCIE certification.

Table of Contents

Preface	ix
EIGRP Fundamentals	1	(22)
Distance Vector and Link State Protocols	1	(5)
Distance Vector Protocols	1	(4)
Link State Protocols	5	(1)
EIGRP Compared to Other Protocols	6	(2)
EIGRP: The Basics	8	(5)
Neighbor Relationships	8	(1)
Reliable Multicast	9	(3)
Limiting Bandwidth Consumption	12	(1)
EIGRP's Foundation: DUAL	13	(4)
The Metric	15	(1)
A More Practical Example	16	(1)
Split Horizon and Queries	17	(5)
Queries with No Feasible Successor	20	(1)
Where Does the Query End?	21	(1)
Deciding Where to Use EIGRP	22	(1)
EIGRP Configuration	23	(14)
Starting and Running EIGRP	23	(2)
The network Command	23	(2)
The Autonomous System (AS) Number	25	(1)
Redistribution	25	(3)
Externals and Internals	26	(1)
Caveats	27	(1)
Configuring Summarization	28	(3)
Autosummarization	28	(1)
Manual Summarization	29	(2)
Distribution Lists	31	(2)
Standard Access Lists as Distribution Lists	31	(1)
Extended Access Lists as Distribution Lists	32	(1)
Hello and Hold Timers	33	(1)
Logging Neighbor Status	34	(1)
Passive Interface	34	(1)
Stub Neighbors	35	(2)
EIGRP Network Design	37	(58)
Network Topology	37	(4)
Hierarchy	38	(1)
Redundancy	39	(2)
Minimizing Query Range	41	(9)
Summarization	42	(3)
Route Filtering	45	(2)
Stub Routers	47	(1)
Multiple Autonomous Systems	48	(1)
Multiple Routing Protocols	49	(1)
Path Selection Issues	50	(12)
Changing the Metric Components on an Interface	50	(2)
Offset Lists	52	(1)
Changing K Values	53	(2)
Variance	55	(2)
Asymmetric Routing	57	(1)
Default Routing Strategy	58	(4)
WAN and Dial Issues	62	(14)
Frame Relay and Bandwidth Statements	62	(2)
Point-to-Point Subinterfaces	64	(1)
Multipoint Interfaces and Subinterfaces	64	(3)
Dual-Homed Remotes	67	(2)
Low-Speed NBMA Links and SIAs	69	(3)
NBMA and Split Horizon	72	(1)
Frame-Relay Broadcast Queue	72	(2)
Dial Backup Strategies	74	(2)
Redistribution Issues	76	(15)
General Issues	77	(3)
Forms of Redistribution	80	(2)
Administrative Distance	82	(2)
Source of Redistributed Routes	84	(7)
Other Design Considerations	91	(4)
EIGRP Troubleshooting	95	(14)
Problems with Neighbor Relationships	95	(6)
One-Way Communication between Two Routers	96	(1)
Unicast-Only between Two Routers	97	(2)
Multicast-Only between Two Routers	99	(1)
Overburdened or Dirty Link	100	(1)
Stuck in Active Routes	101	(3)
Why Did the Route Go Active?	101	(1)
Why Did the Route Stay Active So Long?	102	(2)
Duplicate Router IDs	104	(3)
Failure to Converge	107	(2)
Simplifying the Network	107	(1)
Isolate Misbehaving Routers	107	(1)
Diagnose the Event	108	(1)
Glossary	109	(8)
Recommended Reading	117	(2)
Index	119