Installation Guide

Displaying temperature warnings
If the temperature of a module exceeds the high temperature threshold for any of the fan speeds, the system sends a warning message
to the system log and an SNMP trap. (For more information about the low and high temperature thresholds, refer to Changing
temperature thresholds for modules and fan speeds on page 211.) This section describes how to view the system log. If you have
congured your router to use a Syslog server or SNMP trap receiver, refer to the documentation for the server or receiver.
To display the system log, enter the show log command at any CLI level.
device# show log
Temperature log reduction
Depending on settings and temperature readings, fan speeds are changed dynamically within the following ranges: low, med, med-hi,
and high. Fan speed changes are determined by temperature thresholds set for sensors on the management modules, interface modules
and switch fabric modules. When a temperature threshold is passed upward on any module, the fan speed changes to the assigned fan
speed. This occurs even if the temperature is within the threshold for the slower fan speed on other modules. In previous versions of the
software, a log message is sent whenever a temperature threshold is crossed on any module whether the fan speed is actually increased
or not. This can result in excessive log messages.
The default behavior is a for log message to be sent only when the fan speed is actually changed, which reduces the number of
messages. A CLI option allows you to log all messages or have a single log message sent when any temperature threshold is crossed.
Details about how to set temperature thresholds and default threshold values are described in the Conguring the cooling system on
page 210
Conguring temperature logging
The temp log-threshold command sets the temperature logging threshold to send a single message whenever any of the thresholds are
crossed.
device(config) temp-log-threshold low
Syntax: temp log threshold [ verbose | high |low |med | med-high]
• The verbose option generates logs whenever a temperature threshold is crossed. This is the operational mode of previous
versions of Multi-Service IronWare software and provides backward compatibility.
• The high option generates logs only when the high threshold is crossed.
• The low option generates logs whenever any threshold (low, medium, medium-high or high) is crossed.
• The med option generates logs only when the medium, medium-high, and high thresholds are crossed.
• The med-high option generates logs only when the medium-high and high thresholds are crossed. This is the default setting.
This output displays two instances of a module temperature exceeding the warning threshold.
Managing interface modules
Managing interface modules
Extreme Routing MLX Series Hardware Installation Guide
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