Network Warrior View Larger Image | Gary A. Donahue
O'Reilly Media, Paperback, Published June 2007, 576 pages, ISBN 0596101511 | List Price: $44.99
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Chapter 4: VLANS
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Written by networking veteran with 20 years of experience, Network Warrior
provides a thorough and practical introduction to the entire network infrastructure,
from cabling to the routers. What you need to learn to pass a Cisco certification
exam such as CCNA and what you need to know to survive in the real world are
two very different things. The strategies that this book offers weren't on the
exam, but they 're exactly what you need to do your job well.
Network Warrior takes you step by step through the world of hubs, switches,
firewalls, and more, including ways to troubleshoot a congested network, and
when to upgrade and why. Along the way, you 'll gain an historical perspective
of various networking features, such as the way Ethernet evolved. Based on the
author 's own experience as well as those he worked for and with, Network Warrior
is a Cisco-centric book, focused primarily on the TCP/IP protocol and Ethernet
networks -- the realm that Cisco Systems now dominates. The book covers:
The type of networks now in use, from LANs, WANs and MANs to CANs
* The OSI Model and the layers involved in sending data
* Hubs, repeaters, switches, and trunks in practice
* Auto negotiation and why it 's a common problem in network slowdowns
* Route maps, routing protocols, and switching algorithms in Cisco routers
* The resilient Ethernet -- how to make things truly redundant
* Cisco 6500 multi-layer switches and the Catalyst 3750 switch
* Telecom nomenclature -- why it 's different from the data world
* T1 and DS3
* Firewall theory, designing access lists, authentication in Cisco devices
* Server load balancing technology
* Content switch module in action
* Designing QOS and what QOS does not do
* IP design and subnetting made easy
Table of Contents
Preface
Part I. Hubs, Switches, and Switching
1. What Is a Network?
2. Hubs and Switches
Hubs
Switches
3. Auto-Negotiation
What Is Auto-Negotiation?
How Auto-Negotiation Works
When Auto-Negotiation Fails
Auto-Negotiation Best Practices
Configuring Auto-Negotiation
4. VLANs
Connecting VLANs
Configuring VLANs
5. Trunking
How Trunks Work
Configuring Trunks
6. VLAN Trunking Protocol
VTP Pruning
Dangers of VTP
Configuring VTP
7. EtherChannel
Load Balancing
Configuring and Managing EtherChannel
8. Spanning Tree
Broadcast Storms
MAC Address Table Instability
Preventing Loops with Spanning Tree
Managing Spanning Tree
Additional Spanning Tree Features
Common Spanning Tree Problems
Designing to Prevent Spanning Tree Problems
Part II. Routers and Routing
9. Routing and Routers
Routing Tables
Route Types
The IP Routing Table
10. Routing Protocols
Communication Between Routers
Metrics and Protocol Types
Administrative Distance
Specific Routing Protocols
11. Redistribution
Redistributing into RIP
Redistributing into EIGRP
Redistributing into OSPF
Mutual Redistribution
Redistribution Loops
Limiting Redistribution
12. Tunnels
GRE Tunnels
GRE Tunnels and Routing Protocols
GRE and Access Lists
13. Resilient Ethernet
HSRP
HSRP Interface Tracking
When HSRP Isn't Enough
14. Route Maps
Building a Route Map
Policy-Routing Example
15. Switching Algorithms in Cisco Routers
Process Switching
Interrupt Context Switching
Configuring and Managing Switching Paths
Part III. Multilayer Switches
16. Multilayer Switches
Configuring SVIs
Multilayer Switch Models
17. Cisco 6500 Multilayer Switches
Architecture
CatOS Versus IOS
18. Catalyst 3750 Features
Stacking
Interface Ranges
Macros
Flex Links
Storm Control
Port Security
SPAN
Voice VLAN
QoS
Part IV. Telecom
19. Telecom Nomenclature
Introduction and History
Telecom Glossary
20. T1
Understanding T1 Duplex
Types of T1
Encoding
Framing
Performance Monitoring
Alarms
Troubleshooting T1s
Configuring T1s
21. DS3
Framing
Line Coding
Configuring DS3s
22. Frame Relay
Ordering Frame-Relay Service
Frame-Relay Network Design
Oversubscription
Local Management Interface (LMI)
Configuring Frame Relay
Troubleshooting Frame Relay
Part V. Security and Firewalls
23. Access Lists
Designing Access Lists
ACLs in Multilayer Switches
Reflexive Access Lists
24. Authentication in Cisco Devices
Basic (Non-AAA) Authentication
AAA Authentication
25. Firewall Theory
Best Practices
The DMZ
Alternate Designs
26. PIX Firewall Configuration
Interfaces and Priorities
Names
Object Groups
Fixups
Failover
NAT
Miscellaneous
Troubleshooting
Part VI. Server Load Balancing
27. Server Load-Balancing Technology
Types of Load Balancing
How Server Load Balancing Works
Configuring Server Load Balancing
28. Content Switch Modules in Action
Common Tasks
Upgrading the CSM
Part VII. Quality of Service
29. Introduction to QoS
Types of QoS
QoS Mechanics
Common QoS Misconceptions
30. Designing a QoS Scheme
Determining Requirements
Configuring the Routers
31. The Congested Network
Determining Whether the Network Is Congested
Resolving the Problem
32. The Converged Network
Configuration
Monitoring QoS
Troubleshooting a Converged Network
Part VIII. Designing Networks
33. Designing Networks
Documentation
Naming Conventions for Devices
Network Designs
34. IP Design
Public Versus Private IP Space
VLSM
CIDR
Allocating IP Network Space
Allocating IP Subnets
IP Subnetting Made Easy
35. Network Time Protocol
What Is Accurate Time?
NTP Design
Configuring NTP
36. Failures
Human Error
Multiple Component Failure
Disaster Chains
No Failover Testing
Troubleshooting
37. GAD's Maxims
Maxim #1
Maxim #2
Maxim #3
38. Avoiding Frustration
Why Everything Is Messed Up
How to Sell Your Ideas to Management
When to Upgrade and Why
Why Change Control Is Your Friend
How Not to Be a Computer Jerk
Index
About the Author
Gary A. Donahue is a working consultant who has been in the computer industry
for 25 years. Gary has worked as a programmer, mainframe administrator, Technical
Assistance Center engineer, network administrator, network designer, and consultant.
Gary has worked as the Director of Network Infrastructure for a national consulting
company and has been the president of his own New Jersey consulting company;
GAD Technologies.
Having designed and built networks ranging from simple LANs to world-wide converged
VoIP networks, Gary has worked with people from all levels of IT and management.
From small local businesses to Fortune 500 clients Gary observed many misunderstandings
regarding routing and switching technologies, even among people with high-level
certifications. Gary's goal as a consultant has always been to help his clients
understand the technology at hand. Over the years he has written many documents
outlining complex technologies in order that others might better understand.
Much of this knowledge has been transformed into this book.
Being a teacher by nature, Gary enjoys the process of imparting newfound understanding
to others. Gary has taught Tae Kwon Do, Photography and Astronomy both informally
and through professional schools. Being someone who disdains boredom, Gary has
many hobbies including amateur radio, astronomy, bicycling, computers of all
kinds, gadgets, guitar, hiking, home theater, martial arts, photography, SCUBA
diving, and competitive shooting. Gary is the owner of the Newf-Net Newfoundland
Dog forum and is the author of the Newf-L F.A.Q.
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