Troubleshooting TCP/IP Networks


Build and troubleshoot multicast, IPsec, and wireless IP applications in 16 hands-on labs.

Understanding how TCP/IP is "supposed" to work is not enough for today's network managers. Real-world networking requires the knowledge of how to prevent, detect, troubleshoot, and correct TCP/IP problems. Use field metering tools and protocol analyzers to troubleshoot a live TCP/IP network. Identify and correct protocol errors, DNS route problems, application faults, and slow response.

To register call 916-852-2570

This course can be delivered by the methods below:
Classroom Learning $1295 USD
Self-Paced e-Learning See Below

You Learn...

Monitor a live TCP/IP network using protocol analyzers, network management systems, and field testers
Learn how to maximize the value of your protocol analyzer
Develop an arsenal of tools and methods to attack network problems
Learn effective methods of baselining and trend analysis
Find and eliminate duplicate IP addresses
Isolate protocol errors and troubleshoot communications between hosts
Troubleshoot and repair problems on a TCP/IP enterprise network
Monitor networks using protocol analyzers
Effective methods of baselining and trend analysis

Who Would Benefit

This course is for those responsible for designing, administering, or maintaining TCP/IP networks.

Data center managers
Systems engineers
LAN systems managers
Technical managers
Software engineers
LAN/WAN technicians
Communications managers
Network support technicians

 

Course Outline

Please choose below for spefcific Outline information.

Classroom and Virtual Classroom e-Learning Outline
Self Paced e-Learning Details

Classroom and Virtual Classroom e-Learning Outline

1. Effective Troubleshooting

Three requirements
Troubleshooting psychology
Course methodology

2. Technology Overview

Data communications - the OSI model
The TCP/IP Family of Protocols
Network interface layer
Host-to-host layer
Internet layer
Application layer
Local Area Networks
Wide Area Networks
Switching
Bridging
Routing

3. Knowing Your Network

Application metering
Network management systems
SNMP
Platforms
Applications
Baselining and trend analysis
Broadcasts
Response time
Retransmissions
Using a protocol analyzer
Host identification
Routing
Bandwidth and throughput
Identifying bottlenecks
Traffic characterization
Node-by-node traffic
Protocol breakdown
Errors
Optimization

4. Troubleshooting Tools

Cable testers
Impedance and crosstalk
Near-End Crosstalk (NEXT)
Pair matching
Cable length
Storage and uploading of test results
Traffic level monitoring
Field analyzers
SNMP gets
Utilization statistics
PING tests
Autodiscovery
Port testing
Protocol analyzers
Triggers
Filters
Displays
Reports
Monitoring
RFC 1147
arp
ifconfig
netstat
nslookup
PING
Debugging a connectivity problem
Using Traceroute
Checking for DNS problems
ICMP
Documentation

5. Protocol Analyzer Basics

Analyzer types
Monitor vs. capture
Analyzer strategies
Reading displays
Filtering techniques

6. Troubleshooting Methodology

Gather information
Isolate the problem
Apply corrective measures
Monitor results
Keep the "noise" down

7. Layer-by-Layer Issues

Network interface layer
Cable plant
Network interface card
Frame types
Broadcast levels
Bridge configuration
Hubs/repeaters
Internetwork layer
Router configuration
ARPs
Tunneling
Host-to-host (transport) layer
UDP checksum
TCP overhead
TCP sizes
TCP window
Application Layer
Telnet
TFTP
NFS
FTP
Web applications
User applications

Course Labs

Hands-On Lab 1: In this instructor-led demo, learn monitoring facilities of the protocol analyzer used in class.

Hands-On Lab 2: The first step in troubleshooting a network is understanding the network itself. What characteristics will you measure for your baseline? Learn how to collect and analyze data to establish a baseline for the classroom network.

Hands-On Lab 3: Examine the available options of the PING command and exercise the 7-step PING procedure discussed in class.

Hands-On Lab 4: Use Traceroute to verify that the routers are working properly. Compare results to those generated by the IP record route option.

Hands-On Lab 5: Proper operation of the Domain Name Server is crucial to a smooth running IP network. Gain experience using Nslookup to query DNS servers to diagnose and troubleshoot errors.

Hands-On Lab 6: Where can you find the number of TCP segments retransmitted by a particular device? What about the number of IP fragments generated? CRC errors? Routing tables? Active TCP sessions? At your workstation, use Netstat to get information on the status of networking devices, routing tables, and TCP/UDP connections.

Hands-On Lab 7: The PING utility, when used properly, can tell you much more than whether you have IP connectivity to an IP host. Use PING to identify the effect that packet size and path have on round-trip times. You also identify multiple ways to answer questions about identified network characteristics.

Hands-On Lab 8: Practice several methods of setting up and using filters on your protocol analyzer.

Hands-On Lab 9: Examine, decode, and interpret multiple ICMP error messages. Identify a wide variety of scenarios that could produce such messages.

Hands-On Lab 10: Using a protocol analyzer, inspect and discuss the characteristics of various TCP/IP applications including Telnet, FTP, and the Web. Learn where to look to identify application faults.

Hands-On Lab 11: Using the tools and techniques refined in previous labs, your job is to find the source of a communications failure as soon as possible and fix it.

Hands-On Lab 12: A user has recently moved to a new cubicle. He calls to report that he can't use any of the applications he has used in the past. Identify dozens of potential causes for communications problems.

Hands-On Lab 13: Users are able to communicate to some hosts on the network, but not others. Working with other students in the class, determine who can talk to whom, isolate the source of the problem, and fix it.

Hands-On Lab 14: Classroom teams work together to discover how Microsoft's TCP/IP implementation prevents problems by detecting and reporting duplicate IP addresses on the network.

Hands-On Lab 15: A user needs to access a particular server to retrieve information. She's made several attempts to reach the server, but has been unsuccessful. Does her difficulty stem from a DNS problem? Using nslookup and other tools, verify that DNS is working properly.

Hands-On Lab 16: A disgruntled employee has gotten into the network and created chaos. It's your job to find the problems. Using all the tools available to you, locate each problem before the employees revolt.

Self-Paced e-Learning Details

Title 1 - The TCP/IP Environment - 282031

To truly understand how to troubleshoot a network, you must have a solid grasp of the technologies that support TCP/IP. Explore the data communication process in detail and examine the internetworking devices used to build LANs. Learn effective methods of baselining and trend analysis, and understand how to analyze your network's normal operation.

Title 2 - TCP/IP Troubleshooting Tools and Techniques - 282032

Do you have an arsenal of network troubleshooting tools at your fingertips? Using a guaranteed troubleshooting methodology, explore the hardware and software tools that can help you troubleshoot your network. Gain valuable skills by learning how to isolate and analyze network problems.

Package Titles 1-2 - 282081

 

Suggested Prerequisites

Students are required to have a good working knowledge of TCP/IP such as that found in our Internetworking With TCP/IP course. Experience with DOS/Windows is expected. Experience with UNIX or Windows NT systems is very helpful.

Internetworking with TCP/IP

 

Suggested Follow-ons

Students followed up Troubleshooting TCP/IP Networks by attending these popular classes:

ICND (Interconnecting Cisco Network Devices)
Network Security I: Policy, Administration, and Firewalls

 

Self-Paced e-Learning

Title 01: The TCP/IP Environment (282031) - $395 USD
Title 02: TCP/IP Troubleshooting Tools and Techniques (282032) - $495 USD
Package Titles 1-2 (282081) - $795 USD