Cisco Press CCIE Professional Development - Cisco LAN Switch.pdf - CCNP - sliwak

Cisco LAN Switching

Kennedy Clark

Kevin Hamilton

Publisher: Cisco Press

First Edition August 26, 1999

ISBN: 1-57870-094-9, 960 pages

Front Matter

Table of Contents

Index

About the Author

CCIE Professional Development: Cisco LAN Switching is

essential for preparation for the CCIE Routing and Switching

exam track. As well as CCIE preparation, this

comprehensive volume provides readers with an in-depth

analysis of Cisco LAN Switching technologies, architectures

and deployments. CCIE Professional Development: Cisco

LAN Switching discusses product operational details,

hardware options, configuration fundamentals, spanning

tree, source-route bridging, multilayer switching, and other

technology areas related to the Catalyst series switches.

The book presents these issues at advanced levels,

providing overviews of both LAN technologies and Cisco

switching hardware, and covering Catalyst network design

essentials not found anywhere else. CCIE candidates will

gain exam preparation through the following book

elements: chapter-opening overviews of objectives;

scenarios that highlight real-world issues; configuration

examples and case studies; and review questions and

exercises.

About the Authors

Kennedy Clark is a CCIE instructor and consultant for Chesapeake Computer

Consultants, Inc. (CCCI), a Cisco training partner. As a Cisco Certified Systems

Instructor (CCSI), Kennedy was one of the original Catalyst instructors for Cisco.

Having focused on Catalyst and ATM switching since 1996, he has taught a wide

variety of switching classes. As a consultant for CCCI, Kennedy has been involved in

the design and implementation of many large, switched backbones.

Kevin Hamilton is also an instructor and consultant for Chesapeake. As a CCSI,

Kevin spends most of his instructional time teaching the Cisco Catalyst and ATM

courses. Prior to joining Chesapeake, Kevin worked for 11 years at Litton-FiberCom,

where he designed and deployed numerous analog and digital communications

systems worldwide, including Ethernet, Token-Ring, FDDI, and ATM. Kevin obtained

a degree in Electrical Engineering from Pennsylvania State University.

About the Technical Reviewers

Merwyn Andrade works as a Senior Technical Marketing Engineer for Cisco

Systems, Inc. in San Jose, California. Merwyn works closely with Cisco engineering

and customers on features running across Cisco switches as well as enhancements to

minimizing downtime and convergence and improving network availability. Merwyn

also has a patent in progress in this area. Prior to Cisco, Merwyn worked with the

Bombay Stock Exchange and as a Network Consultant with HCL-Hewlett Packard in

India. He is an Industrial Electronics Engineer from Bombay, India.

Philip B. Bourgeois has been in the computer industry for fifteen years, spending

seven years as a networking specialist with IBM and the past five years as a Senior

Systems Engineer with Cisco Systems. Phil is experienced in the design and

implementation of large IP and multiprotocol networks, encompassing complex wide

area network designs and campus local area networks. Phil is a networking

consultant to the largest commercial enterprises in the northeast area, including

insurance, the health care industry, aerospace, pharmaceuticals, casino/gaming

industry, state government agencies, and higher education. His current position is as

a Consulting Systems Engineer with a specialty focus in high-speed LAN switching

and ATM network design projects.

Jennifer DeHaven Carroll is a Principal Consultant for International Network

Services. She is CCIE number 1402. She earned her Bachelor of Science degree in

Computer Science from University of California, Santa Barbara. In the past 11 years,

Jennifer has planned, designed, and implemented many networks, utilizing both

Layer 2 and Layer 3 techniques. She has also developed and taught many theory

and Cisco implementation classes on various networking technologies.

Stuart Hamilton is the Senior Manager of Enterprise Network Design at Cisco

Systems where he leads a team of engineers focused on the design requirements of

enterprise customers. Stuart is a CCIE and joined Cisco in 1992 where, as a System

Engineer and Consulting Engineer, worked closely in the field with numerous

customers on large scale network designs and implementations. Early in Stuart's 14

years of experience he held various technical design and engineering roles at Bell

Northern Research, Northern Telecom (now Nortel Networks), and Cognos

Incorporated.

Tom Nosella is Manager of Network Design Engineering for Cisco's Enterprise Line

of Business. Tom and his team of network design engineers provide direction and

expertise in enterprise network design for both Cisco's worldwide systems engineers

and Cisco's enterprise customer base. Tom is a CCIE and has six years of experie nce

in managing and designing large data networks for customers within the enterprise

and service provider area. Tom joined Cisco Systems from Bell Canada where he led

a team of network engineers providing outsourced network management services for

large enterprise customers.

Acknowledgments

Kennedy Clark: An avid reader of all things nerdy, I have always taken

acknowledgements and dedications fairly lightly. Having now been through the book-

writing process myself, I can assure you that this will never be the case again.

Writing a book (especially one on technology that is as fast-moving as switching) is

an incredibly demanding process that warrants a huge number of "thank yous." In

the brief space I have here, I would like to express appreciation to a small number of

the people involved in this project. First, I would like to thank Kevin Hamilton, my

co-author. Kevin was willing to jump into a project that had almost been left for dead

because I was feeling completely overwhelmed by the staggering amount of work it

involved. I would like to thank Radia Perlman for reading the e-mails and Spanning

Tree chapters of an "unknown author." Also, the people at Cisco Press have been

wonderful to work with (I would encourage other authors to check them out). Chris

Cleveland and Brett Bartow deserve special mention. There are many people at Cisco

to thank… Jon Crawfurd for giving a young NetWare guy a chance with router

technology. Stuart Hamilton for taking this project under his wing. Merwyn Andrade

for being the switching genius I someday hope to be. Tom Nosella for sticking with

the project through its entirety. I owe many thanks to the people at Chesapeake

Computer Consultants. I would especially like to thank Tim Brown for teaching me

one of my first network courses and remaining a faithful friend and mentor. Also,

Tom Van Meter for showing me the ropes with ATM. Finally, a very special thanks to

my wife for her never-ending love and encouragement.

And, to God, for giving me the ability, gifts, and privilege to work in such an exciting

and fulfilling career.

Kevin Hamilton: A project of this magnitude reflects the hard work of many

individuals beyond myself. Most notably, Kennedy. He repeatedly amazes me with

his ability to not only understand minute details for a vast array of subjects (many of

which are Catalyst related), but to reiterate them without reference to written

materials months and even years past the time when he is exposed to the point. His

keen insights to networking and unique methods of communicating them consistently

challenge me to greater professional depths. I, therefore, thank Kennedy for the

opportunity to join him in this endeavor, and for the knowledge I gained as a result

of sharing ink with him. I also must thank the staff and instructors at Chesapeake

Computer Consultants for their continuous inspiration and support as we at times felt

discouraged thinking we would never write the last page. And Tim Brown, who

taught me that technology can be funny. And lastly, the staff at Cisco Press. Brett

Bartow and Chris Cleveland must especially be commended for their direction and

vision in this project. They worked hard at keeping us focused and motivated. I truly

believe that without their guidance, we could never have produced this book on our

own.

Icons Used in This Book

Throughout the book, you will see the following icons used for the varying types of

switches:

ATM

Switch

Catalyst

5000

Layer 3 (MLS) Routing

Switch

Layer 3 (8500) Switching

Router

In addition, you will see the usual battery of network device, peripheral, topology,

and connection icons associated with Cisco Systems documentation. These icons are

as follows:

Router

Bridge

Repeater

Hub

MAU

Modem

PBX/SWITCH

File Server

Printer

Phone

Workstation

Terminal

Sun Workstation

Macintosh

Telecommuter

Line: Ethernet

FDDI Ring

Token Ring

Network Cloud

Line: Serial

Line: Circuit Switched

Foreword

With the advent of switching technology and specifically the enormously successful

Catalyst Switching products from Cisco Systems, corporatio ns all over the world are

upgrading their infrastructures to enable their networks for high bandwidth

applications. Although the original goal of most switched network design was

primarily increased bandwidth, the networks of today require much more with the

advent of mission critical applications and IP Voice emerging as mainstream

networking requirements. It is therefore important not only to reap the bandwidth

benefits of Catalyst switching but also learn sound network design principles

leveraging all of the features in the Catalyst software suite.

One thing network designers have learned over the years is that things never get

any easier when it comes to understanding and evaluating all of the available

technologies that appear in standards bodies and are written about in trade

magazines. We read about MPOA, LANE, Gigabit Ethernet, 802.1Q, 802.1p, Layer 3

switching, OSPF, BGP, VPN, MPLS, and many others. The key, however, to building

and operating a successful network is understanding the basic fundamentals of the

relevant technologies, knowing where and how to apply them most effectively in a

network, and most importantly leveraging the successes of others to streamline the

deployment of the network. Internetworking design is part art and part science

mostly due to the fact that the applications that ride on top of the network have

widely varying traffic characteristics. This represents another challenge when

designing a network because you might well optimize it to perform for a certain

application only to find that a few months later a brand new application places

entirely differing demands on the network.

The science part of campus network design relies on a few basic principles. First,

every user connects to a port on a switch and so wiring closets are provisioned with

Catalyst switches such as the Catalyst 5000 family to connect end users either at 10

megabit Ethernet or increasingly 100 megabit Ethernet. The base level of switching

capability here is called Layer 2 switching.

There are typically tens to hundreds of wiring closets that need to be connected

somehow. Although there are many ways to do this, experience has taught us that a

structured approach with some hierarchy is the best technique for a stable and easily

expandable network. Wiring closets then are typically consolidated into a network

Cisco Press CCIE Professional Development - Cisco LAN Switch.pdf

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: