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Network Maintenance and Troubleshooting Guide: Field-Tested Solutions for Everyday Problems

Autor Neal Allen
en Limba Engleză Paperback – oct 2009
Network Maintenance and Troubleshooting Guide
Field-Tested Solutions for Everyday Problems, Second Edition
Neal Allen
The 100% practical, real-world guide to anticipating, finding, and solving network problems-fast!
Real-life networks don't always behave "by the book." Troubleshooting them requires practical intuition that normally comes only with experience. In this book, Fluke Networks' Neal Allen brings together all that hard-won, hands-on insight: everything you need to discover what's really happening in your network, so you can anticipate and fix problems before users even notice them.
Writing for network technicians and administrators at all levels, Allen presents an approach to troubleshooting that has been proven in networks of all kinds, no matter how complex. He introduces indispensable triage and troubleshooting techniques for everything from copper and fiber cabling to IPv6, and presents unparalleled guidance on identifying and resolving problems at the MAC Layer. He illustrates his advice with diagrams, tables, and screen captures from Fluke Networks' market-leading instruments. Throughout this book, Allen also offers practical summaries of each of today's core networking technologies, making it an ideal complement to any network certification study guide.
Coverage includes
  • Using the OSI model to more efficiently troubleshoot networks layer by layer
  • Copper and fiber-optic cabling: theory, operation, and troubleshooting
  • Media Access Control (MAC) Layer: Ethernet theory and operation
  • Identifying and resolving problems related to IPv4 and IPv6 protocols
  • Preventing problems before they occur
  • Discovering device behavior
  • Troubleshooting switches
  • Using a protocol analyzer more successfully
  • Creating network documentation that helps you more efficiently prevent and resolve problems
Road tested by thousands of Fluke Networks customers, this book's first edition became the best-kept secret resource for sysadmins, netadmins, and support technicians fortunate enough to discover it. Now, Allen has thoroughly updated his classic for today's networks. If you're responsible for maintaining one of those networks, you'll find this new Second Edition even more indispensable.
Neal Allen is a senior staff engineer in the Fluke Networks' Technical Assistance Center (TAC) focusing on escalated problems. He has been involved in designing, installing, and troubleshooting networks for nearly 20 years. Allen has served on Interop's trade show Network Operations Center (NOC) team since 1993, troubleshooting show-floor problems at the Las Vegas and Atlanta Interop trade shows, and helped support and troubleshoot the network for the 1996 Atlanta Olympic Games. His responsibilities currently include product feature specification and beta testing, remote and onsite problem solving, and providing training and sales support worldwide.
informit.com/aw Cover design by Louisa Adair
Cover photography from Image Source / Getty Images
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Specificații

ISBN-13: 9780321647412
ISBN-10: 0321647416
Pagini: 576
Dimensiuni: 185 x 226 x 33 mm
Greutate: 0.95 kg
Ediția:Nouă
Editura: Addison-Wesley Professional
Locul publicării:Boston, United States

Descriere

Network Maintenance and Troubleshooting Guide
Field-Tested Solutions for Everyday Problems, Second Edition
Neal Allen
 
The 100% practical, real-world guide to anticipating, finding, and solving network problems—fast!
 
Real-life networks don’t always behave “by the book.” Troubleshooting them requires practical intuition that normally comes only with experience. In this book, Fluke Networks’ Neal Allen brings together all that hard-won, hands-on insight: everything you need to discover what’s really happening in your network, so you can anticipate and fix problems before users even notice them.
 
Writing for network technicians and administrators at all levels, Allen presents an approach to troubleshooting that has been proven in networks of all kinds, no matter how complex. He introduces indispensable triage and troubleshooting techniques for everything from copper and fiber cabling to IPv6, and presents unparalleled guidance on identifying and resolving problems at the MAC Layer. He illustrates his advice with diagrams, tables, and screen captures from Fluke Networks’ market-leading instruments. Throughout this book, Allen also offers practical summaries of each of today’s core networking technologies, making it an ideal complement to any network certification study guide.
 
Coverage includes

  • Using the OSI model to more efficiently troubleshoot networks layer by layer
  • Copper and fiber-optic cabling: theory, operation, and troubleshooting
  • Media Access Control (MAC) Layer: Ethernet theory and operation
  • Identifying and resolving problems related to IPv4 and IPv6 protocols
  • Preventing problems before they occur
  • Discovering device behavior
  • Troubleshooting switches
  • Using a protocol analyzer more successfully
  • Creating network documentation that helps you more efficiently prevent and resolve problems

 
Road tested by thousands of Fluke Networks customers, this book’s first edition became the best-kept secret resource for sysadmins, netadmins, and support technicians fortunate enough to discover it. Now, Allen has thoroughly updated his classic for today’s networks. If you’re responsible for maintaining one of those networks, you’ll find this new Second Edition even more indispensable.
 
Neal Allen is a senior staff engineer in the Fluke Networks’ Technical Assistance Center (TAC) focusing on escalated problems. He has been involved in designing, installing, and troubleshooting networks for nearly 20 years. Allen has served on Interop’s trade show Network Operations Center (NOC) team since 1993, troubleshooting show-floor problems at the Las Vegas and Atlanta Interop trade shows, and helped support and troubleshoot the network for the 1996 Atlanta Olympic Games. His responsibilities currently include product feature specification and beta testing, remote and onsite problem solving, and providing training and sales support worldwide.
 
informit.com/aw Cover design by Louisa Adair
Cover photography from Image Source / Getty Images


Cuprins

Introduction
Chapter 1: Using the OSI Model
Quick Tour of the OSI Model
Seven Layers of the OSI Model
    Layer 7: Application Layer
    Layer 6: Presentation Layer
    Layer 5: Session Layer
    Layer 4: Transport Layer
    Layer 3: Network Layer
    Layer 2: Data Link Layer
    Layer 1: Physical Layer
Networking Devices and the OSI Model
    Repeaters
    Bridges
    Routers
    Switches
    Switch Forwarding Techniques
Common Networking Tools
    Network Management Tools
    Protocol Analyzers
    Handheld Network Analyzers
    Cable Testers
    Flow Protocols
Summary
Chapter Review Questions
Chapter 2: Copper Media
Standards
Basic Cable Uses
Test Parameters
    Basic Tests and Parameters Required for In-Channel Testing
    Basic Frequency-Based Test Parameters Related to In-Channel Testing
    Advanced Frequency-Based Test Parameters Related to In-Channel and External Testing
    Other Commonly Referenced Test Parameters
    Test Configurations
What Should Be Tested?
Grounding and Shielding Cable
Summary
Chapter Review Questions
Chapter 3: Fiber Optic Media
Safety
    Light
    Glass
Standards
Fiber Optic Cable Design
    Fiber Cable Construction
    Cable Construction
    Connector Types
Test Parameters
    Field Testing Parameters
Light Behavior
    Dispersion
    Modal Bandwidth
    Critical Angle
    Bending Fiber
    Graded Index
    Light Sources
    Launch Conditions
    Mandrels
    Mode Conditioning
    Absorption
    Fresnel Reflections
    Fiber Termination Polish
    Fiber Alignment Errors and Manufacturing Flaws
Testing Practices and Tools
    Test Methods
    Tools
Levels of Testing
    Tier 1
    Tier 2
    Precautions for Measurement and Testing
Summary
Chapter Review Questions
Chapter 4: Media Access Control Layer
Ethernet and the OSI Model
Frame Structure
    Bits to Bytes
    Bytes to Field Groupings
    Basic Ethernet Frame Fields
Theory of Operation
    Interpacket Spacing
    Retransmission
    Error Handling
    Duplex
    Frame Bursting
    Auto-Negotiation
    Power over Ethernet (PoE)
    Ethernet Implementation Details
    10 Mbps Versions of Ethernet
    100Mbps Versions of Ethernet
    1000Mbps Versions of Ethernet
    10Gbps Versions of Ethernet
    10GBASE-T Receive Process
    Ethernet for Subscriber Access Networks
Summary
Chapter Review Questions
Chapter 5: Data Link Layer
Bridges
    Bridge Forwarding Table
    Effect of Forwarding
    Priority
    Spanning Tree Protocol
    VLANs
MAC Control Sublayer
    Frame Structure
    Slow Protocols
    Link Aggregation Sublayer
    Operations, Administration, and Maintenance (OAM) Sublayer
Logical Link Control Sublayer
    802.2 LLC
    802.2 LLC Field Definitions
    802 SNAP
    802 SNAP Field Definitions
Novell Raw
Summary
Chapter Review Questions
Chapter 6: Network Layer
Routers
    OSI Model Implications: Effect of Forwarding
Internet Protocol (IP)
    IPv4 Addressing
    Internet Control Message Protocol (ICMP)
    IPv6 Addressing
    ICMPv6
Summary
Chapter Review Questions
Chapter 7: Transport Layer
TCP and UDP Ports
Transmission Control Protocol (TCP)
    TCP Segments and Maximum Segment Size (MSS)
    TCP Sockets and Connections
    Opening and Closing Connections
    Sequence and Acknowledgment Numbers
    Retransmission
    Selective Acknowledgment (SACK)
    Window Size, Window Scaling, and Sliding Window
    Congestion Control
    TCP Segment Structure
User Datagram Protocol (UDP)
    User Datagram Protocol (UDP) Datagram Structure
Summary
Chapter Review Questions
Chapter 8: Preventing Problems
Strategy for Network Maintenance
    1. Management Involvement in Network Decision Making
    2. Preparation and Planning
    3. Problem Prevention
    4. Early Problem Detection
    5. Quick Problem Isolation and Resolution
    6. Investing More in Tools and Training Rather Than Additional Staff to Accommodate Network Growth
    7. Quality Improvement Approach to Network Management and Maintenance
Documentation
    Methodology
    Discovery and Baselining
    Design Assistance
    Validation
    Create a Server Log and Software Library
    Create a Network Diagram
    Cable Plant Documentation
Develop a Baseline
    Traffic Monitoring
Proactive Activity and Preparedness
    Monitoring the Physical and MAC Layers
    Monitoring the Network Layer
    Monitoring the Transport Layer
    Application Monitoring
Summary
Chapter Review Questions
Chapter 9: Troubleshooting
Best Method
Process
Eight Key Steps to Successful Troubleshooting
    Step 1. Identify the Exact Issue
    Step 3. Localize and Isolate the Cause
    Step 4. Formulate a Plan for Solving the Problem
    Step 5. Implement the Plan
    Step 6. Test to Verify That the Problem Has Been Resolved
    Step 7. Document the Problem and Solution
    Step 8. Provide Feedback to the User
A Place to Start
Summary
Chapter Review Questions
Chapter 10: Troubleshooting Media
Troubleshooting Copper Media
    Tools
    General Testing and Installation Issues
Troubleshooting Fiber Optic Media
    Tools
    General Testing and Installation Issues
Summary
Chapter Review Questions
Chapter 11: Network Troubleshooting
Tools
    Cable Testers
    Protocol Analysis
    Network Management
    Flow Protocols
    Handheld Network Analyzers
    Advanced Analysis Products
Troubleshooting Generalized User Complaints
    Problem: Can’t Connect
    Problem: Connections That Drop
    Problem: Slow or Poor Performance
General Troubleshooting Advice
    Specific Error Types
    Some Simple Guidelines
    Specific Test Suggestions
Summary
Chapter Review Questions
Appendix A: Copper Test Failure Cause Tables
Wiremap
Length
Propagation Delay or Delay Skew
Insertion Loss (Attenuation)
NEXT and PSNEXT
Return Loss
ACRF and PSACRF (ELFEXT and PSELFEXT)
Resistance
Characteristic Impedance
Impulse Noise
Alien Crosstalk Mitigation
Appendix B: Waveform Decoding Exercise
Module 1: Counting Systems and Encoding Methods
    Counting Systems
    OSI Seven-Layer Model
    Signaling and Encoding Methods
Module 2: Decoding a Waveform into Ethernet
    10Mbps Transmission Process
    Decoding the Waveform
Module 3: Using Standards Documents and RFCs
    Standards and RFCs
Module 4: Using a Protocol Analyzer
    OptiView Protocol Expert in Five Buttons
    Protocol Expert Lab
Appendix C: Auto-Negotiation
FLP Field Definitions
    Base Page
    Message Pages
    Unformatted Pages
    Extensions to Auto-Negotiation for 1000BASE-X
    Extensions to Auto-Negotiation for 10GBASE-T
Appendix D: Discovering Device Behavior
At What Layer Does This Device Operate?
    Test #1: Basic Functionality
    Test #2: The Gray Area
    Test #3: Find Any Configured VLANs
How to Use the Test Results
    Collision Domain
    Broadcast Domain
    Different Network
Appendix E: Techniques for Troubleshooting Switches
What Problems Are Encountered in Switched Environments?
    How Do You Find Which Port or Switch Has a Problem?
Techniques for Troubleshooting a Switch
    Method 1: Access the Switch Console
    Method 2: Connect to an Unused Port
    Method 3: Configure a Mirror or Span Port
    Method 4: Connect to a Tagged or Trunk Port
    Method 5: Insert a Hub into the Link
    Method 6: Place the Tester in Series
    Method 7: Place a Tap Inline on a Link
    Method 8: Use SNMP-Based Network Management
    Method 9: Have the Switch Send Flow Technology Summaries
    Method 10: Set Up a Syslog Server
    Method 11: Use the Server (Host) Resources
    Method 12: Use a Combination of Methods
Troubleshooting Methods: Conclusion
Appendix F: Simple Network Management Protocol
SNMP Operation
    SNMPv1
    SNMPv2
    SNMPv3
SNMP Use
Appendix G: Troubleshooting with a Protocol Analyzer
Understanding a Web Page Connection
    DNS Query
    ARP Query
    TCP Connection
    Data Transfer
    Closing the Connection
    DNS Failure
Protocol Analyzers and Protocol Knowledge
Appendix H: Network Diagnostic Products Used in This Book
What Tool to Start With?
    Network Operations
    Network Engineering
    Network Technicians
    Network/PC Support Help Desk
Media Test
    DTX 1800 Cable Analyzer
    OptiFiber Certifying OTDR
    AnalyzeAir Wi-Fi Spectrum Analyzer
Network Analysis: Hybrid Handhelds
    OptiView
    EtherScope
    NetTool
    LinkRunner
Protocol Analysis
    Capture
    Built-in Features
    Alarms and Triggers
    Data Storage and Reporting
Flow Protocols Analysis
    Visual Performance Manager
    Visual UpTime Select
    NetFlow Tracker
    Application Performance
Appendix I: Answers to Chapter Review Questions
 
 
9780321647412   TOC   9/29/2009
 
 


Notă biografică

Neal Allen is a senior engineer in the Technical Assistance Center (TAC) at Fluke Networks in Everett, Washington focusing on escalated issues related to Fluke Network s' server-based monitoring solutions.  His responsibilities in TAC are the particularly difficult or obscure problems, both phoned in and at various customer sites around the world.  He also works closely with the design engineers on new product or feature specifications and later on alpha and beta testing of the same.  Previously he was a product manager for handheld network analyzers.  His responsibilities in marketing were "anything the engineers don't do," including market research, writing manuals and literature, helping to specify and beta test new products and product features, attending and delivering papers at trade shows, and providing both training and sales support worldwide.  Allen has been involved in network design, installation, and troubleshooting for nearly 20 years.  Although his focus has been primarily OSI Layer 3 and below, he has also designed and taught a number of short seminars and a three-quarter introductory networking course at local community colleges.  Allen has been a member of the Interop trade show NOC (Network Operations Center) team since 1993 and, in addition to other responsibilities, is responsible for troubleshooting show-floor problems at the Las Vegas Interop trade shows.  Allen was chosen to help support and troubleshoot the network for the 1996 Atlanta Olympic Games.


Textul de pe ultima copertă

Network Maintenance and Troubleshooting Guide Field-Tested Solutions for Everyday Problems, Second Edition Neal Allen The 100% practical, real-world guide to anticipating, finding, and solving network problems-fast! Real-life networks don't always behave "by the book." Troubleshooting them requires practical intuition that normally comes only with experience. In this book, Fluke Networks' Neal Allen brings together all that hard-won, hands-on insight: everything you need to discover what's really happening in your network, so you can anticipate and fix problems before users even notice them. Writing for network technicians and administrators at all levels, Allen presents an approach to troubleshooting that has been proven in networks of all kinds, no matter how complex. He introduces indispensable triage and troubleshooting techniques for everything from copper and fiber cabling to IPv6, and presents unparalleled guidance on identifying and resolving problems at the MAC Layer. He illustrates his advice with diagrams, tables, and screen captures from Fluke Networks' market-leading instruments. Throughout this book, Allen also offers practical summaries of each of today's core networking technologies, making it an ideal complement to any network certification study guide. Coverage includes

  • Using the OSI model to more efficiently troubleshoot networks layer by layer
  • Copper and fiber-optic cabling: theory, operation, and troubleshooting
  • Media Access Control (MAC) Layer: Ethernet theory and operation
  • Identifying and resolving problems related to IPv4 and IPv6 protocols
  • Preventing problems before they occur
  • Discovering device behavior
  • Troubleshooting switches
  • Using a protocol analyzer more successfully
  • Creating network documentation that helps you more efficiently prevent and resolve problems

Road tested by thousands of Fluke Networks customers, this book's first edition became the best-kept secret resource for sysadmins, netadmins, and support technicians fortunate enough to discover it. Now, Allen has thoroughly updated his classic for today's networks. If you're responsible for maintaining one of those networks, you'll find this new Second Edition even more indispensable. Neal Allen is a senior staff engineer in the Fluke Networks' Technical Assistance Center (TAC) focusing on escalated problems. He has been involved in designing, installing, and troubleshooting networks for nearly 20 years. Allen has served on Interop's trade show Network Operations Center (NOC) team since 1993, troubleshooting show-floor problems at the Las Vegas and Atlanta Interop trade shows, and helped support and troubleshoot the network for the 1996 Atlanta Olympic Games. His responsibilities currently include product feature specification and beta testing, remote and onsite problem solving, and providing training and sales support worldwide. informit.com/aw

Cover design by Louisa Adair Cover photography from Image Source / Getty Images