This book covers TCP/IP Troubleshooting techniques. Besides providing a basic understanding of TCP/IP communications it contains many trace files that show how the communication looks like on the cable system. The book is ideal for network technicians who want to learn how to understand and troubleshoot TCP/IP communications.

Novell's Guide to Troubleshooting TCP/IP

by Silvia Hagen and Stephanie Lewis
ISBN 0-7645-4562-0

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Content at a Glance


The network is down and it's your responsibility to fix it. Now. And you don't know where to start. If you've ever been in this situation, you know very well how frustrating it can be to deal with the TCP/IP protocol stack. With so many different protocols performing so many different functions, how can you possibly know where to start? Is it the router? The IP address? The subnet mask? DHCP? SNMP? or DNS? Novell or UNIX or NT?
This book not only tells you where to start, but how to troubleshoot common TCP/IP problems on multiple platforms. Novell's Guide to Troubleshooting TCP/IP provides comprehensive, easy to understand technical coverage of the protocol stack from the packet level view. We use analysis products - and show you how to do the same - to uncover the true communication that occurs in the TCP/IP environment. This book covers each of the protocols in depth, beginning with its function. Each protocol is then dissected and the fields and field values detailed for you to understand. A case study using that particular protocol is covered in depth at the end of each chapter to help you understand how the analyzer is used in the troubleshooting process. Next time the network is down, be ready.


Who should read this book?top
This book is a must read for anyone that installs, configures, designs or troubleshoots TCP/IP networks on any platform. Whether you are just beginning to use network analysis tools, are an experienced network analyst, or somewhere in between, this book is for you. We've provided examples that show just what you should be seeing on the wire, plus real life case studies to assist in the troubleshooting process.


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Chapter 4 - IP Chapter 14 - SLP
Chapter 8 - OSPF Chapter 15 - Pure IP
Chapter 9 - UDP Chapter 18 - Miscellaneous
Chapter 11 - DHCP Chapter 20 - IPv6
Chapter 12 - DNS    

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Content at a Glancetop

Part I Analysis Basics

Chapter 1
Overview of TCP/IP Analysis This chapter shows how the TCP/IP stack is formed and used, and gives a basis for further analysis. Data flow and network design considerations are discussed. The role of network hardware such as hubs, switches, bridges and routers and their effect on infrastructure are explained.
Chapter 2
Analyzers and Available Tools This chapter gives an overview of the analysis process. Different analysis methods and products are discussed, and a number of vendor-specific tools are used.
Chapter 3
Analyzing Ethernet and Token Ring Networks In this chapter, you are introduced to the frame types and communication methods used by these popular topologies. Common Ethernet infrastructure problems and solutions are defined, including runts, collisions, fragments, alignment/CRC problems. Token Ring specific errors are defined, including soft errors and burst errors. Topology rules for cabling are defined.

Part II – Analyzing and Troubleshooting the Internet Layer

Chapter 4
Internet Protocol This chapter defines the function of the IP protocol, proper IP addressing and IP packet structure and field values. Learn how routing decisions are made by clients and gateways, pros and cons of using the default gateway property of many client TCP/IP software products.
Chapter 5
Address Resolution Protocol/Reverse Address Resolution Protocol This chapter defines the ARP/RARP protocol function and packet structures. Learn how ARP is used to communicate with other hosts on the network.
Chapter 6
Internet Control Message Protocol This chapter shows how ICMP can be used as a troubleshooting tool. Discussion of the function, packet structures and message types is also included.
Chapter 7
Routing Information Protocol This chapter gives a functional description of RIP1 and RIP2, routing protocols. Possible issues surrounding this protocol are defined and differences between these versions of the routing protocol are discussed, along with packet structure and field values.
Chapter 8
Open Shortest Path First This chapter discusses the functionality of the OSPF link state protocol. Routing decisions and components of this routing protocol are discussed, along with configuration parameters and packet structures.

Part III – Analyzing and Troubleshooting the Host to Host Layer

Chapter 9
User Datagram Protocol This chapter gives a functional description of UDP and applications that use UDP for transport. An analysis of a UDP session is covered, along with the UDP packet structure and values.
Chapter 10
Transmission Control Protocol This chapter discusses the most popular transport in the TCP/IP protocol suite – TCP. The function of TCP is discussed, along with the handshake, sliding window, flow control and other features of this transport protocol. TCP sessions are analyzed, and the TCP packet structure and field values are given.

Part IV- Analyzing and Troubleshooting the Application Layer

Chapter 11
Dynamic Host Configuration Protocol and BOOTP This chapter discusses the use and function of DHCP, analysis of a session, and how addresses are leased. Address renewal and popular DHCP options are discussed, along with the packet structure and field values.
Chapter 12
Domain Name System This chapter discusses the use and function of DNS, legal and illegal DNS names and lookup types. DNS authorities, root servers and zones are discussed. A DNS session is analyzed, and packet structures and field values are given.
Chapter 13
Simple Network Management Protocol This chapter teaches how the SNMP protocol, MIB databases and Structure of Management Information is used to manage devices on a TCP/IP network. SNMP commands and security issues are discussed. An SNMP session is analyzes and packet structures are detailed.
Chapter 14
Service Location Protocol New to NetWare 5, this chapter details the function of this protocol, the SLP communication process and packet structure.

Part V – Vendor Implementation of TCP/IP

Chapter 15
Novell TCP/IP Implementation/Configuration This chapter details the TCP/IP support available in NetWare products. Discussion focuses on SNMP, DHCP, DNS and SNMP support. Native IP architecture and implementation is discussed and a sample communication session is analyzed.
Chapter 16
Microsoft 95/98/NT TCP/IP Implementation/Configuration. This chapter details the TCP/IP support available in Microsoft products. Focus is on the DNS, DHCP support available, along with Microsoft implementations of NetBIOS over TCP/IP and Windows Internet Naming Service. NetBIOS node types are discussed, and a sample configuration is described.
Chapter 17
UNIX TCP/IP Implementation/Configuration This chapter describes the differences between several UNIX vendor verions of TCP/IP. Discussion focuses on Linux, Sun and HP installations, utilities and configuration for DNS, DHCP and ICMP support.

Part VI – Other TCP/IP Communications and Issues

Chapter 18
Miscellaneous TCP/IP Communications This chapter details important TCP/IP protocols including the Network Time Protocol, IGMP, Cisco’s IGRP and EIGRP.
Chapter 19
IP Encapsulation This chapter discusses IP tunneling and types of tunneling products. Virtual private networks, IPv6 tunneling are discussed, and a sample session is analyzed.
Chapter 20
IP Version 6 This chapter discusses the newest version of the TCP/IP protocol – version 6. Functionality is discussed, along with addressing methods and transition implementation. Packet structures are defined and the use of dual IP layers is considered.



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