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Troubleshoot the EX4400 Components

 

Chassis Component Alarm Conditions on EX4400 Switches

This topic describes the chassis component alarm conditions on EX4400 switches.

Table 1 lists the alarms that the chassis components can generate on EX4400 switches, their severity levels, and the actions you can take to respond to them.

Table 1: Alarm Conditions on EX4400 Switches

Chassis Component

Alarm Condition

Alarm Severity

Remedy

Fan modules

Fan module is not installed.

Major (red)

Install the fan module.

Mix of fan modules with different airflow directions.

Major (red)

Do not mix fan modules with different directions for the airflow in the same chassis.

Mix of fan modules and power supplies with different airflow directions.

Major (red)

Do not mix fan modules and power supplies with different directions for the airflow in the same chassis.

Power supplies

A power supply is removed from the chassis.

Major (red)

Install a power supply in the empty slot.

The power supply is not switched on.

Minor (yellow)

Check the input connection to the power supply.

An unknown power supply is installed.

Major (red)

Install a power supply recommended by Juniper Networks.

Mix of power supplies with different airflow directions.

Major (red)

Do not mix power supplies with different airflow directions in the same chassis.

Mix of fan modules and power supplies with different airflow directions.

Major (red)

Do not mix fan modules and power supplies with different airflow directions in the same chassis.

Temperature

The temperature inside the chassis reaches the yellow alarm limit.

Minor (yellow)

  • Check the fan.

  • 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).

The temperature inside the chassis reaches the red alarm limit.

Major (red)

  • Check the fan.

  • 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).

The temperature sensor has failed.

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).

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, then 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).

Routing Engine

/var partition usage is high.

Minor (yellow)

Clean up the system file storage space on the switch. For more information, see Freeing Up System Storage Space.

/var partition is full.

Major (red)

Clean up the system file storage space on the switch. For more information, see Freeing Up System Storage Space.

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.

Troubleshoot 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.

Caution

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.

  1. 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. The 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

    Table 2 lists the output fields for the show chassis environment command. Output fields are listed in the approximate order in which they appear.

    Table 2: 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: FPCs (or line cards), Control Boards, Routing Engines, and PEMs (power entry modules or 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.

  2. Issue the command show chassis temperature-thresholds. This command displays the chassis temperature threshold settings. The 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-thresholds

    Table 3 lists the output fields for the show chassis temperature-thresholds command. Output fields are listed in the approximate order in which they appear.

    Table 3: 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 or amber alarm or a red alarm.

    Yellow or amber alarm

    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 or amber 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 or amber 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 4 lists the possible causes for the switch to generate a temperature alarm and the respective remedies.

Table 4: 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.

Fan module or fan tray has failed.

  • Check the fan.

  • Replace the faulty fan module or fan tray.

  • If the two checks mentioned above show no problems, 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).

Restricted airflow through the switch due to insufficient clearance around the installed switch.

Ensure that there is sufficient clearance around the installed switch.