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4-12 SmartCell 6A000 User Guide
Lo
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s and Alarms Switch Administration
4.4.1 Lo
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Messa
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e System
The software modules and submodules of the SmartCell 6A000 switch automatically generate log messages. These
messages are stored in the log message buffer, residing in system memory. Messages are conditionally forwarded from
the log message buffer to two other buffers: the log trace buffer and the alarm message buffer. You can view log
messages directly from the log message buffer. However, you can filter and prioritize messages by viewing them
through the log trace and alarm message buffers.
How Lo
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Messa
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es and Alarm Messa
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es Differ
Alarms are log messages that are forwarded from the log message buffer into the alarm message buffer. Forwarding is
based on user-defined filters of the error flags contained within the log messages. Use the
show logalarmmask and
modify logalarmmask commands to view and modify the Alarm Message flag settings.
The alarm message buffer resides in flash RAM and is non-volatile. For example, if a switch crashes and is then
rebooted, you can view the alarm messages that were sent just before the crash. Conversely, the contents of the log
message buffer (residing in system memory) are lost when a crash occurs.
Use the
modify alarmconf command to control the amount of flash memory allocated to the alarm message buffer,
and to specify the size of each alarm message file within the buffer. Also, use the
modify alarmconf command to
control the number of alarm messages each file contains.
Viewin
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and Filterin
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Messa
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es
View console system messages from one of three locations (see Figure 4-4).
• The log message buffer: A straight dump to the console of all messages in the log message buffer.
You cannot filter between the log message buffer and the console. You can turn the display of log
messages on or off using the
modify logprint command.
• The log trace buffer: All log messages are forwarded into the log trace buffer from the log message
buffer. To filter messages sent to the console use the
modify logtrace command. Notice that
filtering occurs between the log trace buffer and the console, affecting only the display. You can turn
log trace messages on and off by changing the setting of
quietmode from the modify logtrace
command.
• The alarm message buffer: To view alarm messages, enter the show alarm command. To show a
single alarm, specify the alarm buffer index number. Accepting the default index of
all displays all
alarm messages in the mlarm message buffer.
Notice that filtering on alarm messages occurs between the log message buffer and alarm message buffers, not between
the alarm message buffer and the console.