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ERserver
iSeries

TCP/IP troubleshooting
Version 5

ERserver
iSeries

TCP/IP troubleshooting
Version 5

© Copyright International Business Machines Corporation 1997, 2002. All rights reserved. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.

Contents
Chapter 1. TCP/IP troubleshooting . . . . . . . . .. . . . . . . . . . . . . . . . . 1 What’s new for V5R2? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Print this topic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Chapter 2. General TCP/IP problems . . . . . . Initial TCP/IP problem analysis . . . . . . . . . Cause list A . . . . . . . . . . . . . . . . | IPv6 solutions . . . . . . . . . . . . . .Cause list B . . . . . . . . . . . . . . . . Cause list C . . . . . . . . . . . . . . . . Cause list D . . . . . . . . . . . . . . . . Cause list E . . . . . . . . . . . . . . . . PING command considerations . . . . . . . . . Concatenate the domain name to the host name . Common error messages . . . . . . . . . Work with the job log and message queues . . . . . 3 . 3 . 3 . 5 . 6 . 7 . 8 . 9 . 9 . . .. . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . .

Chapter 3. Specific application problems . . . . . . . . . . . . . . . . . . . . . . . 13 | | | | | | | | | | Chapter 4. Communications trace. . . Plan a communications trace . . . . . Perform a communications trace . . . . Start a communications trace . . . . End a communications trace . . . . Dump a communications trace . . . Print a communicationstrace . . . . View the contents of a communications Read a communications trace . . . . Additional communications trace function . . . . . . . . . . . . . . . trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 15 16 16 17 17 18 18 19 21

Chapter 5. TCP/IP configuration files . . . . . . . . . . . . . . . . . . . . . . . . 23 Chapter 6. Product activity log . . . . . . . . . . . . . . . . . . . . . . . . . . . 25© Copyright IBM Corp. 1997, 2002

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iSeries: TCP/IP troubleshooting

Chapter 1. TCP/IP troubleshooting
What is holding up your TCP/IP functionality? You designed a solid network and followed all the directions, but you have reached an impasse. This topic will lead you to the solution. This site is a centralized resource for finding answers to TCP/IP problems. You may have ageneral connectivity problem that is quickly identified or a more localized problem that requires in-depth consideration. Troubleshooting tools are provided below to help you solve the problem. What’s new for V5R2? Use this topic to learn about new and changed methods for troubleshooting TCP/IP. Print this topic Use this topic to print or download a Portable Document Format (PDF) version of theTCP/IP troubleshooting documentation. General TCP/IP problems This topic helps you verify your TCP/IP connectivity. Use a question-and-answer format to zero in on your problem and link to potential solutions. Specific application problems If you know your problem lies within a particular application, such as FTP or DNS, then use this topic to link to that application for specific solutions....