Troubleshooting EX8200 Components
Understanding Alarm Types and Severity Levels on EX Series Switches
This topic applies only to the J-Web Application package.
Alarms alert you to conditions that might prevent normal operation of the switch. Before monitoring alarms on a Juniper Networks EX Series Ethernet switch, become familiar with the terms defined in Table 1.
Table 1: Alarm Terms
Term | Definition |
|---|---|
alarm | Signal alerting you to conditions that might prevent normal
operation. On a switch, the alarm signal is the |
alarm condition | Failure event that triggers an alarm. |
alarm severity | Seriousness of the alarm. If the Alarm ( |
chassis alarm | Preset alarm triggered by a physical condition on the switch such as a power supply failure, excessive component temperature, or media failure. |
system alarm | Preset alarm triggered by a missing rescue configuration or failure to install a license for a licensed software feature. Note: On EX6200 switches, a system alarm can be triggered by an internal link error. |
Alarm Types
The switch supports these alarms:
Chassis alarms indicate a failure on the switch or one of its components. Chassis alarms are preset and cannot be modified.
System alarms indicate a missing rescue configuration. System alarms are preset and cannot be modified, although you can configure them to appear automatically in the J-Web interface display or the CLI display.
Alarm Severity Levels
Alarms on switches have two severity levels:
Major (red)—Indicates a critical situation on the switch that has resulted from one of the following conditions. A red alarm condition requires immediate action.
One or more hardware components have failed.
One or more hardware components have exceeded temperature thresholds.
An alarm condition configured on an interface has triggered a critical warning.
Minor (yellow or amber)—Indicates a noncritical condition on the switch that, if left unchecked, might cause an interruption in service or degradation in performance. A yellow alarm condition requires monitoring or maintenance.
A missing rescue configuration generates a yellow system alarm.
See also
Chassis Component Alarm Conditions on EX8200 Switches
Purpose
This document provides information on chassis alarm conditions, and how you must respond when a certain chassis alarm is seen on your switch.
Various conditions related to the chassis components trigger yellow and red alarms. You cannot configure these conditions. See Understanding Alarm Types and Severity Levels on EX Series Switches.
Action
You can monitor chassis alarms by watching the ALM chassis status LED and using the LCD panel to gather information about the alarm. See Chassis Status LEDs in an EX8200 Switch and LCD Panel in an EX8200 Switch.
To display switch chassis alarms in the CLI, use the following command
The command output displays the number of alarms currently active, the time when the alarm began, the severity level, and an alarm description. Note the date and time of an alarm so that you can correlate it with error messages in the messages system log file.
You can also monitor chassis alarms using the J-Web interface. See Checking Active Alarms with the J-Web Interface.
Table 2 lists some of the chassis alarms that an EX8200 switch can generate.
Table 2: Chassis Alarms for EX8200 Switches
| Component | Alarm Condition | Severity | Remedy | Additional Information |
|---|---|---|---|---|
| Fan tray | The fan tray has been removed from the chassis. | Minor (yellow) or Major (red) | Install the fan tray. | The switch will eventually get too hot to operate if a fan tray is removed. Temperature alarms will follow. This alarm is expected during fan tray removal and installation. |
One or more fans in a fan tray are spinning below the required speed. | Major (red) | Replace the fan tray. | Individual fans cannot be replaced; you must replace the fan tray. | |
The fan tray might not be properly installed. | Major (red) | Remove and reinstall the fan tray. If removing and reinstalling the fan tray does not resolve the problem, reboot the switch. | The switch will eventually get too hot to operate if a fan tray is not operating. Temperature alarms will follow. | |
| Power supply | A power supply slot that contained a power supply at bootup is now empty. | Minor (yellow) | Install a power supply in the empty power supply slot. | You can ignore this alarm in cases in which a power supply slot can remain empty. You will not see this alarm if the switch is booted with an empty power supply slot. This alarm is expected during power supply removal and installation. This alarm can be triggered during a line card installation. The alarm condition corrects itself when seen for this reason. |
A power supply has failed due to an input or output failure, or due to temperature issues. | Major (red) | Replace the failed power supply. | ||
The power supply might not be properly installed. | Major (red) |
| ||
A power supply fan has failed. | Minor (yellow) | Replace the failed power supply. | ||
A power supply has a high temperature. | Major (red) | Check the power supply fan. | ||
Insufficient power input | Major (red) | Check the power supply. | ||
An unknown power supply is installed. | Major (red) |
| ||
| Temperature | The chassis warm temperature threshold has been exceeded and fan speeds have increased. | Minor (yellow) | Bring down the room temperature, if possible. Ensure that the airflow through the switch is unobstructed. | The chassis is warm and must be cooled down. The switch is still functioning normally. To monitor temperature: user@switch> show chassis environment To monitor temperature thresholds: user@switch> show chassis temperature-thresholds |
The chassis high temperature threshold has been exceeded and the fans are operating at full speed. | Major (red) | Bring down the room temperature, if possible. Ensure that the airflow through the switch is unobstructed. | The chassis is hot and must be cooled down. The switch might still function normally but is close to shutting down if it hasn’t already. To monitor temperature: user@switch> show chassis environment To monitor temperature thresholds: user@switch> show chassis temperature-thresholds | |
The chassis warm temperature threshold has been exceeded, and one or more fans are not operating properly. The operating fans are running at full speed. | Minor (yellow) | Replace the fan tray that has the faulty fan or fans. Bring down the room temperature, if possible. Ensure that the airflow through the switch is unobstructed. | The chassis is warm and must be cooled down. The switch is still functioning normally. To monitor temperature: user@switch> show chassis environment To monitor temperature thresholds: user@switch> show chassis temperature-thresholds | |
The chassis high temperature threshold has been exceeded, and one or more fans are not operating properly. The operating fans are running at full speed. | Major (red) | Replace the fan tray that has the faulty fan or fans. Bring down the room temperature, if possible. Ensure that the airflow through the switch is unobstructed. | The chassis is hot and must be cooled down. The switch might still function normally but is close to shutting down if it hasn’t already. To monitor temperature: user@switch> show chassis environment To monitor temperature thresholds: user@switch> show chassis temperature-thresholds | |
The temperature sensor on a hardware component has failed. | Minor (yellow) | Replace the hardware component. | ||
| Management Ethernet interface | Management Ethernet link is down. | Major (red) | Check whether a cable is connected to the management Ethernet interface, or whether the cable is defective. Replace the cable if required. If you are unable to resolve the problem, open a support case using the Case Manager link at https://www.juniper.net/support/ or call 1-888-314-5822 (toll-free within the United States and Canada) or 1-408-745-9500 (from outside the United States). | |
| Media | Minor loss of communication with backup Routing Engine. | Minor (yellow) | Not applicable | Alarm to inform user of the intermittent loss of communication with Backup RE |
Device booted from backup root. | Minor (yellow) | Open a support case using the Case Manager link at https://www.juniper.net/support/ or call 1-888-314-5822 (toll-free within the United States and Canada) or 1-408-745-9500 (from outside the United States). | ||
| Major (red) | Open a support case using the Case Manager link at https://www.juniper.net/support/ or call 1-888-314-5822 (toll-free within the United States and Canada) or 1-408-745-9500 (from outside the United States). | ||
| Minor (yellow) | Open a support case using the Case Manager link at https://www.juniper.net/support/ or call 1-888-314-5822 (toll-free within the United States and Canada) or 1-408-745-9500 (from outside the United States). | ||
Upgrade bank is empty or corrupted. | Major (red) | Open a support case using the Case Manager link at https://www.juniper.net/support/ or call 1-888-314-5822 (toll-free within the United States and Canada) or 1-408-745-9500 (from outside the United States). | ||
Firmware version is not the latest. | Minor (yellow) | Open a support case using the Case Manager link at https://www.juniper.net/support/ or call 1-888-314-5822 (toll-free within the United States and Canada) or 1-408-745-9500 (from outside the United States). | ||
Single-bit ECC error detected. | Major (red) | Open a support case using the Case Manager link at https://www.juniper.net/support/ or call 1-888-314-5822 (toll-free within the United States and Canada) or 1-408-745-9500 (from outside the United States). | ||
Console device encounters framing error storm. | Not applicable | Check for faulty console cable. | ||
| Routing Engine module (RE module), Switch Fabric and Routing Engine module (SRE module), or Switch Fabric module (SF module) | The RE module, SRE module, or the SF module has failed. | Major (red) | Replace the failed module. | |
Rescue configuration is not set. | Minor (yellow) | Use the request system configuration rescue save command to set the rescue configuration. | ||
Feature usage requires a license or the license for the feature usage has expired. | Minor (yellow) | Install the required license for the feature specified in the alarm. For more information, see Understanding Software Licenses for EX Series Switches. | ||
Backup Routing Engine is active. | Minor (yellow) | Not applicable | Alarm to inform user. | |
| Link Status | The link to the network is down. | Major (red) or Minor (yellow) | Check network connectivity. | The network link is disabled by default, so you might see this alarm before you connect the switch to the network. |
| Line Cards | Hardware errors - Packet Forwarding Engine error, Line card fails to initiate, line card unresponsive | Major (red) | Open a support case using the Case Manager link at https://www.juniper.net/support/ or call 1-888-314-5822 (toll-free within the United States and Canada) or 1-408-745-9500 (from outside the United States). | |
Sensor errors - Temperature sensor error, voltage sensor error | Minor (yellow) | Open a support case using the Case Manager link at https://www.juniper.net/support/ or call 1-888-314-5822 (toll-free within the United States and Canada) or 1-408-745-9500 (from outside the United States). |
Checking Active Alarms with the J-Web Interface
Purpose
This topic applies only to the J-Web Application package.
Use the monitoring functionality to view alarm information for the EX Series switches including alarm type, alarm severity, and a brief description for each active alarm on the switching platform.
Action
To view the active alarms:
- Select Monitor > Events and Alarms > View Alarms in the J-Web interface.
- Select an alarm filter based on alarm type, severity, description, and date range.
- Click Go.
All the alarms matching the filter are displayed.
When the switch is reset, the active alarms are displayed.
Meaning
Table 3 lists the alarm output fields.
Table 3: Summary of Key Alarm Output Fields
Field | Values |
|---|---|
Type | Category of the alarm:
|
Severity | Alarm severity—either major (red) or minor (yellow). |
Description | Brief synopsis of the alarm. |
Time | Date and time when the failure was detected. |
Monitoring System Log Messages
Purpose
This topic applies only to the J-Web Application package.
Use the monitoring functionality to filter and view system log messages for EX Series switches.
Action
To view events in the J-Web interface, select Monitor > Events and Alarms > View Events.
Apply a filter or a combination of filters to view messages. You can use filters to display relevant events. Table 4 describes the different filters, their functions, and the associated actions.
To view events in the CLI, enter the following command:
show log
Table 4: Filtering System Log Messages
Field | Function | Your Action |
|---|---|---|
System Log File | Specifies the name of a system log file for which you want to display the recorded events. Lists the names of all the system log files that you configure. By default, a log file, messages, is included in the /var/log/ directory. | To specify events recorded in a particular file, select the system log filename from the list— for example, messages. Select Include archived files to include archived files in the search. |
Process | Specifies the name of the process generating the events you want to display. To view all the processes running on your system, enter the CLI command show system processes. For more information about processes, see the Junos OS Installation and Upgrade Guide. | To specify events generated by a process, type the name of the process. For example, type mgd to list all messages generated by the management process. |
Date From To | Specifies the time period in which the events you want displayed are generated. Displays a calendar that allows you to select the year, month, day, and time. It also allows you to select the local time. By default, the messages generated during the last one hour are displayed. End Time shows the current time and Start Time shows the time one hour before End Time. | To specify the time period:
|
Event ID | Specifies the event ID for which you want to display the messages. Allows you to type part of the ID and completes the remainder automatically. An event ID, also known as a system log message code, uniquely identifies a system log message. It begins with a prefix that indicates the generating software process or library. | To specify events with a specific ID, type the partial or complete ID— for example, TFTPD_AF_ERR. |
Description | Specifies text from the description of events that you want to display. Allows you to use regular expressions to match text from the event description. Note: Regular expression matching is case-sensitive. | To specify events with a specific description, type a text string from the description with regular expression. For example, type ^Initial* to display all messages with lines beginning with the term Initial. |
Search | Applies the specified filter and displays the matching messages. | To apply the filter and display messages, click Search. |
Reset | Resets all the fields in the Events Filter box. | To reset the field values that are listed in the Events Filter box, click Reset. |
Generate Raw Report Note:
| Generates a list of event log messages in nontabular format. | To generate a raw report:
|
Generate Report Note: Starting in Junos OS Release 14.1X53, a Formatted Report can be generated from event log messages being loaded in an Events Detail table.The Generate Report button appears only after event log messages are completely loaded in the Events Detail table. The Generate Raw Report button is displayed while event log messages are being loaded. | Generates a list of event log messages in tabular format, which shows system details, events filter criteria, and event details. | To generate a formatted report:
|
Meaning
Table 5 describes the Event Summary fields.
By default, the View Events page in the J-Web interface displays the most recent 25 events, with severity levels highlighted in different colors. After you specify the filters, Event Summary displays the events matching the specified filters. Click the First, Next, Prev, and Last links to navigate through messages.
Table 5: Viewing System Log Messages
Field | Function | Additional Information |
|---|---|---|
Process | Displays the name and ID of the process that generated the system log message. | The information displayed in this field is different for messages generated on the local Routing Engine than for messages generated on another Routing Engine (on a system with two Routing Engines installed and operational). Messages from the other Routing Engine also include the identifiers re0 and re1 that identify the Routing Engine. |
Severity | Severity level of a message is indicated by different colors.
| A severity level indicates how seriously the triggering event affects switch functions. When you configure a location for logging a facility, you also specify a severity level for the facility. Only messages from the facility that are rated at that level or higher are logged to the specified file. |
Event ID | Displays a code that uniquely identifies the message. The prefix on each code identifies the message source, and the rest of the code indicates the specific event or error. | The event ID begins with a prefix that indicates the generating software process. Some processes on a switch do not use codes. This field might be blank in a message generated from such a process. An event can belong to one of the following type categories:
|
Event Description | Displays a more detailed explanation of the message. | |
Time | Displays the time at which the message was logged. |
See also
Troubleshooting an EX8200 Line Card’s Failure to Power On
Problem
Description: After you have installed a line card in an EX8200 switch, the line card fails to power on correctly. The ON LED on the line card is unlit or is not lit steadily.
Cause
The line card’s failure to power on might have resulted from any one of these causes:
The line card is not seated correctly in the slot in the switch chassis.
The switch does not have sufficient power supplies installed to power on the line card while maintaining its N+1 or N+N power configuration.
The line card requires a particular minimum Junos OS release to power on, and that minimum release is not running on the switch.
Solution
Possible solutions to these problems are:
If the ON LED is unlit:
- Ensure that the line card is installed
correctly:
Issue the show chassis fpc command. If the state of the line card in the CLI is Empty :
- Remove the line card (see Removing a Line Card from an EX8200 Switch).
- Reinstall the line card (see Installing a Line Card in an EX8200 Switch).
- Determine whether the switch has sufficient
power to power on the line card while maintaining its N+1 or N+N power configuration.
Use one of the following methods to determine this :
- Issue the show chassis fpc command. If the state of the line card in the CLI is Offline and the line card description is No power, the switch does not have enough power to power on the line card. Install additional power supplies in the switch. See Installing an AC Power Supply in an EX8200 Switch or Installing a DC Power Supply in an EX8200 Switch.
- Determine the power requirement of the line
card. See Power Requirements for EX8208 Switch Components or Power Requirements for EX8216 Switch Components. Then follow the item below that is appropriate for your switch’s
software release:
If your switch is running Junos OS Release 10.2 or later, issue the show chassis power-budget-statistics command. If the value of the Total Power Available field is less than the power requirement of the line card, the switch does not have enough power to power on the line card. Install additional power supplies in the switch. See Installing an AC Power Supply in an EX8200 Switch or Installing a DC Power Supply in an EX8200 Switch.
If your switch is running Junos OS Release 10.1 or earlier, calculate the total power available—see Calculating Power Requirements for an EX8208 Switch or Calculating Power Requirements for an EX8216 Switch. If the switch does not have enough power to power on the line card, install additional power supplies in the switch. See Installing an AC Power Supply in an EX8200 Switch or Installing a DC Power Supply in an EX8200 Switch.
- Determine whether the line card requires
a particular minimum Junos OS release to power on:
- If your line card has a yellow label on the faceplate,
a tag on the left ejector, and one of the following model number and
part number combinations, it requires a particular Junos OS release
to power on (see Figure 1):
EX8200-8XS, 750-046748
EX8200-40XS, 750-046750
EX8200-48F, 750-046751
EX8200-48T, 750-046749
Figure 1: Locations of the Tag and the Label on the Line Card 
- Upgrade your switch to one of the following Junos OS releases
(see Understanding Software Installation on EX Series Switches) :
Junos OS Release 11.2—R1 and later
Junos OS Release 11.1—R2 and later
Junos OS Release 10.4—R5 and later
Note If you are running a release prior to Junos OS Release 10.4R5 on your EX8200 switch, see this page in our Knowledge Base: https://kb.juniper.net/KB21476 . This page lists recommended releases for EX Series switches.
- Reboot the switch to complete the upgrade process.
- If your line card has a yellow label on the faceplate,
a tag on the left ejector, and one of the following model number and
part number combinations, it requires a particular Junos OS release
to power on (see Figure 1):
If the ON LED blinks in green but is not lit steadily:
Tighten the captive screws on the faceplate of the line card to ensure that the line card is seated correctly in the slot in the switch chassis.
Troubleshooting Temperature Alarms in EX Series Switches
Problem
Description: EX Series switches generate a temperature alarm FPC 0 EX-PFE1 Temp Too Hot.
Cause
Temperature sensors in the chassis monitor the temperature of the chassis. The switch raises an alarm if a fan fails or if the temperature of the chassis exceeds permissible levels.
Solution
When the switch raises a temperature alarm such as the FPC 0 EX-PFE1 Temp Too Hot alarm, use the show chassis environment and the show chassis temperature-thresholds commands to identify the condition that triggered the alarm.
To prevent the switch from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature. To prevent airflow restriction, allow at least 6 inches (15.2 cm) of clearance around the ventilation openings.
- Connect to the switch by using Telnet and issue the show chassis environment command. This command displays environmental information about
the switch chassis, including the temperature, and information about
the fans, power supplies, and Routing Engines. Following is a sample
output on an EX9208 switch. The output is similar on other EX Series
switches.
show chassis environment (EX9208 Switch)
user@switch> show chassis environment
Class Item Status Measurement Temp PEM 0 OK 40 degrees C / 104 degrees F PEM 1 OK 40 degrees C / 104 degrees F PEM 2 Absent PEM 3 Absent Routing Engine 0 OK 37 degrees C / 98 degrees F Routing Engine 0 CPU OK 35 degrees C / 95 degrees F Routing Engine 1 Absent Routing Engine 1 CPU Absent CB 0 Intake OK 36 degrees C / 96 degrees F CB 0 Exhaust A OK 34 degrees C / 93 degrees F CB 0 Exhaust B OK 40 degrees C / 104 degrees F CB 0 ACBC OK 39 degrees C / 102 degrees F CB 0 XF A OK 46 degrees C / 114 degrees F CB 0 XF B OK 45 degrees C / 113 degrees F CB 1 Intake Absent CB 1 Exhaust A Absent CB 1 Exhaust B Absent CB 1 ACBC Absent CB 1 XF A Absent CB 1 XF B Absent FPC 3 Intake OK 48 degrees C / 118 degrees F FPC 3 Exhaust A OK 46 degrees C / 114 degrees F FPC 3 Exhaust B OK 51 degrees C / 123 degrees F FPC 3 XL TSen OK 67 degrees C / 152 degrees F FPC 3 XL Chip OK 58 degrees C / 136 degrees F FPC 3 XL_XR0 TSen OK 67 degrees C / 152 degrees F FPC 3 XL_XR0 Chip OK 51 degrees C / 123 degrees F FPC 3 XL_XR1 TSen OK 67 degrees C / 152 degrees F FPC 3 XL_XR1 Chip OK 63 degrees C / 145 degrees F FPC 3 XQ TSen OK 67 degrees C / 152 degrees F FPC 3 XQ Chip OK 63 degrees C / 145 degrees F FPC 3 XQ_XR0 TSen OK 67 degrees C / 152 degrees F FPC 3 XQ_XR0 Chip OK 68 degrees C / 154 degrees F FPC 3 XM TSen OK 67 degrees C / 152 degrees F FPC 3 XM Chip OK 76 degrees C / 168 degrees F FPC 3 XF TSen OK 67 degrees C / 152 degrees F FPC 3 XF Chip OK 75 degrees C / 167 degrees F FPC 3 PLX PCIe Switch TSe OK 51 degrees C / 123 degrees F FPC 3 PLX PCIe Switch Chi OK 54 degrees C / 129 degrees F FPC 3 Aloha FPGA 0 TSen OK 51 degrees C / 123 degrees F FPC 3 Aloha FPGA 0 Chip OK 70 degrees C / 158 degrees F FPC 3 Aloha FPGA 1 TSen OK 51 degrees C / 123 degrees F FPC 3 Aloha FPGA 1 Chip OK 75 degrees C / 167 degrees F FPC 5 Intake Testing FPC 5 Exhaust A Testing FPC 5 Exhaust B Testing Fans Top Rear Fan OK Spinning at intermediate-speed Bottom Rear Fan OK Spinning at intermediate-speed Top Middle Fan OK Spinning at intermediate-speed Bottom Middle Fan OK Spinning at intermediate-speed Top Front Fan OK Spinning at intermediate-speed Bottom Front Fan OK Spinning at intermediate-speedTable 6 lists the output fields for the show chassis environment command. Output fields are listed in the approximate order in which they appear.
Table 6: show chassis environment Output Fields
Field Name
Field Description
Class
Information about the category or class of chassis component:
Temp: Temperature of air flowing through the chassis in degrees Celsius (°C) and degrees Fahrenheit (°F).
Fans: Information about the status of fans and blowers.
Item
Information about the chassis components: Flexible PIC Concentrators (FPCs)–that is, the line cards–, Control Boards (CBs), Routing Engines (REs), Power Entry Modules (PEMs)–that is, the power supplies.
Status
Status of the specified chassis component. For example, if Class is Fans, the fan status can be:
OK: The fans are operational.
Testing: The fans are being tested during initial power-on.
Failed: The fans have failed or the fans are not spinning.
Absent: The fan tray is not installed.
Measurement
Depends on the Class. For example, if Class is Temp, indicates the temperature in degrees Celsius (°C) and degrees Fahrenheit (°F). If the Class is Fans, indicates actual fan RPM.
- Issue the command show chassis temperature-thresholds. This command displays the chassis temperature threshold settings.
Following is a sample output on an EX9208 switch. The output is similar
on other EX Series switches.
show chassis temperature-thresholds (EX9208 Switch)
user@ host> show chassis temperature-thresholdsFan speed Yellow alarm Red alarm Fire Shutdown (degrees C) (degrees C) (degrees C) (degrees C) Item Normal High Normal Bad fan Normal Bad fan Normal Chassis default 48 54 65 55 80 65 100 Routing Engine 0 70 80 95 95 110 110 112 FPC 3 55 60 75 65 105 80 110 FPC 5 55 60 75 65 90 80 95Table 7 lists the output fields for the show chassis temperature-thresholds command. Output fields are listed in the approximate order in which they appear.
Table 7: show chassis temperature-thresholds Output Fields
Field name
Field Description
Item
Chassis component. You can configure for the threshold information for components such as the chassis, the Routing Engines, and FPC for each slot in each FRU to display in the output. By default, information is displayed only for the chassis and the Routing Engines.
Fan speed
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 fans are present and functioning normally.
High—The temperature threshold at which the fans operate at high speed or when a fan has failed or is missing.
Note: An alarm is not triggered until the temperature exceeds the threshold settings for a yellow alarm or a red alarm.
Yellow alarm
Temperature threshold, in degrees Celsius, that trigger a yellow alarm.
Normal—The temperature threshold that must be exceeded on the component to trigger a yellow alarm when the fans are running at full speed.
Bad fan—The temperature threshold that must be exceeded on the component to trigger a yellow alarm when one or more fans have failed or are missing.
Red alarm
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 when the fans are running at full speed.
Bad fan—The temperature threshold that must be exceeded on the component to trigger a red alarm when one or more fans have failed or are missing.
Fire Shutdown
Temperature threshold, in degrees Celsius, for the switch to shut down.
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 8 lists the possible causes for the switch to generate a temperature alarm and the respective remedies.
Table 8: Causes and Remedies for Temperature Alarms
Cause | Remedy |
|---|---|
Ambient temperature is above threshold temperature. | Ensure that the ambient temperature is within the threshold temperature limit. See Environmental Requirements and Specifications for EX Series Switches. |
Fan module or fan tray has failed. |
|
Restricted airflow through the switch due to insufficient clearance around the installed switch. | Ensure that there is sufficient clearance around the installed switch. See the following topics to understand the clearance requirements of various EX Series switches. |