HP StorageWorks 8/80 Brocade Web Tools Administrator's Guide v6.2.0 (53-100119 - Page 177

Working With Diagnostic Features, In this Trace dumps

Page 177 highlights

Chapter Working With Diagnostic Features 10 In this chapter •Trace dumps 151 •Displaying switch information 154 •Port LED interpretation 158 Trace dumps A trace dump is a snapshot of the running behavior within the Brocade switch. The dump can be used by developers and troubleshooters at Brocade to help understand what might be contributing to a specific switch behavior when certain internal events are seen. For example, a trace dump can be created each time a certain error message is logged to the system error log. Developers can then examine what led up to the message event by studying the traces. Tracing is always "on." As software on the switch executes, the trace information is placed into a circular buffer in system RAM. Periodically, the trace buffer is "frozen" and saved. This saved information is a "trace dump." A trace dump is generated when: • It is triggered manually (use the traceDump command). • A critical-level LOG message occurs. • A particular LOG message occurs (use the traceTrig command to set up the conditions for this). • A kernel panic occurs. • The hardware watchdog timer expires. (For information about the traceDump and traceTrig commands, see the Fabric OS Command Reference.) The trace dump is maintained on the switch until either it is uploaded to the FTP host or another trace dump is generated. If another trace dump is generated before the previous one is uploaded, the previous dump is overwritten. When a trace dump is generated, it is automatically uploaded to an FTP host if automatic FTP uploading is enabled. Web Tools Administrator's Guide 151 53-1001194-01

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Web Tools Administrator’s Guide
151
53-1001194-01
Chapter
10
Working With Diagnostic Features
In this chapter
Trace dumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Displaying switch information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Port LED interpretation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Trace dumps
A trace dump is a snapshot of the running behavior within the Brocade switch. The dump can be
used by developers and troubleshooters at Brocade to help understand what might be contributing
to a specific switch behavior when certain internal events are seen. For example, a trace dump can
be created each time a certain error message is logged to the system error log. Developers can
then examine what led up to the message event by studying the traces.
Tracing is always “on.” As software on the switch executes, the trace information is placed into a
circular buffer in system RAM. Periodically, the trace buffer is “frozen” and saved. This saved
information is a “trace dump.”
A trace dump is generated when:
It is triggered manually (use the
traceDump
command).
A critical-level LOG message occurs.
A particular LOG message occurs (use the
traceTrig
command to set up the conditions for this).
A kernel panic occurs.
The hardware watchdog timer expires.
(For information about the
traceDump
and
traceTrig
commands, see the
Fabric OS Command
Reference
.)
The trace dump is maintained on the switch until either it is uploaded to the FTP host or another
trace dump is generated. If another trace dump is generated before the previous one is uploaded,
the previous dump is overwritten.
When a trace dump is generated, it is automatically uploaded to an FTP host if automatic FTP
uploading is enabled.