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Chapter 4. Solving problems
This section provides basic troubleshooting information to help you solve some
problems that might occur while you are setting up the switch. The Application
Guide for the switch provides more details about troubleshooting the switch.
If you cannot locate and correct a problem by using the information in this section,
see Appendix A, "Getting help and technical assistance," on page 31.
Running POST
To ensure that it is fully operational, the switch processes a series of tests during
power-up or a restart (power-on self-test, or POST). These tests take approximately
1 minute to complete. The management module reads the test results and displays
them for you. During normal operation, these tests are completed without error,
and the green OK LED is lit. However, if the switch fails POST, the yellow switch
error LED and the system-error LED on the Flex System chassis are lit. An event is
stored in the event log in the system status panel of the management module. The
specific failure is displayed on the system status I/O module panel of the
management module.
Note: For the locations and descriptions of the switch LEDs, see "Locating the
POST errors
There are two types of errors: noncritical and critical. A noncritical error applies to
one port, and the switch is operational. You can continue to operate the switch;
however, you must replace it as soon as possible. When critical errors occur, the
switch does not operate. To view POST results, complete the following steps:
1. Log on to the management module as described in the Lenovo Flex System
2. Turn off the power to the switch; then, turn it on again.
3. After POST is completed, the management module displays the results. Refresh
The following table describes the basic critical and noncritical failures. This
abbreviated list is representative; it is not an exhaustive list. An error code is
associated with each failure. Error codes are displayed on the Management Module
Switch Information window. Be sure to note the applicable error code and
corresponding failure. You might have to provide this information when you call
for service. For details, see Appendix A, "Getting help and technical assistance," on
page 31.
© Lenovo 2015. Portions © IBM Corp. 2013.
information panels, LEDs, and external ports" on page 14.
Chassis Management Module Command-Line Interface Reference Guide. If necessary,
obtain the IP address of the management module from your system
administrator. The login window opens.
the window to view the POST results. If a critical error occurs, replace the
switch. If a noncritical error occurs, see the switch error log for additional
details.
Diagnostic indicator (in hex) Failing functional area
00 - 7F
80 - 9F
Base internal functions
Internal interface failures
Failure criticality
Critical
Noncritical
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