Juniper EX4500 Hardware Manual page 258

Table 68: show chassis temperature-thresholds Output Fields (continued)
Field Name
Fan speed
Yellow or amber alarm
Red alarm
Fire Shutdown
When a temperature alarm is triggered, you can identify the condition that triggered it by running the
show chassis environment command to display the chassis temperature values for each component and
comparing those with the temperature threshold values, which you can display by running the show chassis
temperature-thresholds command.
For example, for FPC 3:
If the temperature of FPC 3 exceeds 55° C, the output indicates that the fans are operating at a high
speed (no alarm is triggered).
If the temperature of FPC 3 exceeds 65° C, a yellow alarm is triggered to indicate that one or more fans
have failed.
If the temperature of FPC 3 exceeds 75° C, a yellow alarm is triggered to indicate that the temperature
threshold limit is exceeded.
If the temperature of FPC 3 exceeds 80° C, a red alarm is triggered to indicate that one or more fans
have failed.
If the temperature of FPC 3 exceeds 105° C, a red alarm is triggered to indicate that the temperature
threshold limit is exceeded.
If the temperature of FPC 3 exceeds 110° C, the switch is powered off.
Table 69 on page 259 lists the possible causes for the switch to generate a temperature alarm and the
respective remedies.
Field Description
Temperature thresholds, in degrees Celsius, for the fans to operate at normal and at high speed.
Normal—The temperature threshold at which the fans operate at normal speed and when all the fan
High—The temperature threshold at which the fans operate at high speed or when a fan has failed o
NOTE: An alarm is not triggered until the temperature exceeds the threshold settings for a yellow or
Temperature threshold, in degrees Celsius, that trigger a yellow or amber alarm.
Normal—The temperature threshold that must be exceeded on the component to trigger a yellow o
Bad fan—The temperature threshold that must be exceeded on the component to trigger a yellow o
Temperature threshold, in degrees Celsius, that trigger a red alarm.
Normal—The temperature threshold that must be exceeded on the component to trigger a red alarm
Bad fan—The temperature threshold that must be exceeded on the component to trigger a red alarm
Temperature threshold, in degrees Celsius, for the switch to shut down.
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