IBM 8275-416, User Manual

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Chapter 7. Troubleshooting and Obtaining Service
Diagnosing Problems
This chapter contains procedures that help you to troubleshoot problems with your
switch and its connections to other devices.
Be sure you read “Appendix A. Safety Information” on page 93 before proceeding.
Obtaining Software
To obtain support information, including technical tips, current product information,
and code updates and fixes for the switch, visit the IBM Networking Tech Support
page at:
http://www.ibm.com/networking/support
You can also subscribe to receive e-mail notifications about code updates, tips, and
FAQs for your switch.
Troubleshooting in a Network
The switch terminal interface, Web interface, and SNMP management agent give
you access to important statistics and other information about the network. To
obtain these statistics, see “Chapter 4. Using the Terminal Interface” on page 31
and “Chapter 5. Using the Web Interface” on page 81 and select the appropriate
panels.
Start of Troubleshooting Process
If one or more devices (such as workstations) connected to a switch are unable to
communicate with other devices in the network, use the following steps to start the
troubleshooting process:
1. Locate the switch to which the device is connected. Use the network sketch, the
label on the cable connected to the device, or other network records to help you
locate the switch.
2. Have available any documentation associated with the feature modules that are
installed on the switch.
3. If you have an EIA 232 console session set up, (see “Chapter 2. Accessing the
switch” on page 19), you can use it to determine if diagnostics have been
completed correctly.
4. Observe the LEDs on the front panel of the switch. The location of these LEDs
is shown in Figure 3 on page 10 with explanations of the LED status conditions
in the accompanying table. Ignore the feature module LEDs at this time. Review
this information before proceeding with the troubleshooting process.
5. If the LED status are not OK, locate the symptom that best describes the
communication problem and the LED status you observed in Table 14 on
page 90. Then go the section that contains the recommended actions for
resolving the problem and follow that procedure.
© Copyright IBM Corp. 1999
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