Troubleshoot the EX4100 Components

Chassis Component Alarm Conditions on EX4100 Switches

This topic describes the chassis component alarm conditions on EX4100 switches.

Table 1 lists the alarms that the chassis components can generate on EX4100 switches. The table lists the severity levels of these alarms and the actions that you can take to respond to them.

Table 1: Chassis Component Alarm Conditions on EX4100 Switches
Chassis Component	Alarm Condition	Alarm Severity	Remedy
Power supply	A power supply has been removed from the chassis.	Minor	Install a power supply in the empty slot.
	A power supply output has failed.	Major	Check the power supply output connection.
	A power supply has failed.	Major	Replace the failed power supply.
	An unknown power supply is installed.	Major	Install a power supply recommended by Juniper Networks.
	A mix of power supplies with different airflow directions is installed.	Major	Do not mix power supplies with different airflow directions in the same chassis.
	A mix of fan modules and power supplies with different airflow directions is installed.	Major	Do not mix fan modules and power supplies with different airflow directions in the same chassis.
Fan module	A fan module is not installed.	Major	Install the fan module.
	A fan module has failed.	Major	Replace the fan module.
	A mix of fan modules with different airflow directions is installed.	Major	Do not mix fan modules with different airflow directions in the same chassis.
	A mix of fan modules and power supplies with different airflow directions is installed.	Major	Do not mix fan modules and power supplies with different airflow directions in the same chassis.
Temperature	The temperature inside the chassis reached the yellow or amber alarm limit.	Minor	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).
Temperature	The temperature inside the chassis reached the red alarm limit.	Major	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).
Management Ethernet interface	The Management Ethernet link is down.	Major	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).
Routing Engine	The /var partition usage is high.	Minor	Clean up the system file storage space on the switch. For more information, see Freeing Up System Storage Space.
	The /var partition is full.	Major	Clean up the system file storage space on the switch. For more information, see Freeing Up System Storage Space.
	A rescue configuration is not set.	Minor	Use the `request system configuration rescue save` command to set the rescue configuration.
	The feature usage requires a license, or the license for the feature usage has expired.	Minor	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
Cause
Solution

Problem

Description

EX Series switches trigger a temperature alarm FPC 0 EX-PFE1 Temp Too Hot when the switch temperature becomes too hot.

Cause

Temperature sensors in the chassis monitor the temperature of the chassis. The switch triggers an alarm if a fan fails or if the temperature of the chassis exceeds permissible levels for some other reason.

Solution

When the switch triggers 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, operate it in an area with an ambient temperature within the recommended range. 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. The command also displays 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)

Table 2 lists the output fields for the show chassis environment command. The table lists output fields 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: Flexible PIC Concentrators (FPCs)—that is, the line cards Control Boards (CBs) Routing Engines 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. 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)

Table 3 lists the output fields for the show chassis temperature-thresholds command. The table lists output fields 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 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 triggered when the temperature exceeds the threshold settings for a yellow, amber, or red alarm.
Yellow or amber alarm	Temperature threshold, in degrees Celsius, that triggers a yellow or amber alarm. Normal—The temperature threshold that must be exceeded on the device 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 device 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 triggers a red alarm. Normal—The temperature threshold that must be exceeded on the device to trigger a red alarm when the fans are running at full speed. Bad fan—The temperature threshold that must be exceeded on the device to trigger a red alarm when one or more fans have failed or are missing.
Fire shutdown	Temperature threshold, in degrees Celsius, at which the switch shuts down in case of fire.

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. You can display the temperature threshold values 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. It also lists 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. See Environmental Requirements and Specifications for EX Series Switches.
Fan module or fan tray has failed.	Perform the following steps: Check the fan. Replace the faulty fan module or fan tray. If the above two checks 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.

EX4100 and EX4100-F Switch Hardware and CLI Terminology Mapping

This topic describes the hardware terms used in EX4100 switch documentation and the corresponding terms used in the Junos OS CLI (see Table 5).

Table 5: CLI Equivalents of Terms Used in the Documentation for EX4100 Switches
Hardware Item (CLI)	Description (CLI)	Value	Item In Documentation	Additional Information
Chassis	One of the following: EX4100-24P EX4100-24T EX4100-24T-DC EX4100-48P EX4100-48T EX4100-48T-DC EX4100-48T-AFI EX4100-24MP EX4100-48MP	–	Switch chassis	#id-ex4100-switch-models
Routing Engine (`n`)	One of the following: RE-EX4100-24T RE-EX4100-24P RE-EX4100-48P RE-EX4100-48T RE-EX4100-24MP RE-EX4100-48MP	`n` is a value in the range 0 through 9. In a standalone switch, the default value is 0. In a Virtual Chassis configuration, the values correspond to the member IDs of switches configured in the primary role and the backup role in the Virtual Chassis.	Routing Engine	–
FPC (`n`)	Abbreviated name of the Flexible PIC Concentrator (FPC) One of the following: EX4100-24T-CHAS EX4100-24P-CHAS EX4100-48T-CHAS EX4100-48P-CHAS EX4100-24MP-CHAS EX4100-48MP-CHAS	n is a value in the range 0 through 9.		Understanding Interface Naming Conventions
		In a standalone switch, the default value is 0.	In this case, FPC refers to the switch itself.
		In a Virtual Chassis configuration, the values correspond to the assigned member IDs of switches in the Virtual Chassis.	In this case, the FPC number refers to the member ID assigned to the switch.
PIC (`n`)	Abbreviated name of the Physical Interface Card (PIC)	`n` is a value in the range 0 through 2.		Understanding Interface Naming Conventions
	One of the following: EX4100-24P, EX4100-24T, EX4100-24T-DC switches: 24x10/100/1000 Base-T EX4100-48P, EX4100-48T, EX4100-48T-DC, EX4100-48T-AFI switches: 48x10/100/1000 Base-T EX4100-24MP switches: 8x100M/1G/2.5G/5G/10G, 16x10M/100M/1G Base-T EX4100-48MP: 16x100M/1G/2.5G, 32x10M/100M/1G Base-T	PIC 0	PIC 0 stands for built-in network ports numbered 0 through 23 or 0 through 47	#id-ex4100-switches-hardware-overview
	One of the following: EX4100-24P, EX4100-24T, EX4100-24T-DC switches: 4x10G SFP/SFP+ EX4100-48P, EX4100-48T, EX4100-48T-DC: 4x10G/4x25G SFP/SFP+ EX4100-24MP switches: 4x1G/10G/25G SFP/SFP+/SFP28 EX4100-48MP switches: 4x1G/10G/25G SFP/SFP+/SFP28	PIC 1	SFP28/SFP+ dedicated virtual chassis ports	#id-ex4100-switches-hardware-overview
	One of the following: EX4100-48P, EX4100-48T, EX4100-48T-DC, EX4100-24P, EX4100-24T-DC switches: 4x1G/10G SFP/SFP+ EX4100-24P, EX4100-24T, EX4100-24T-DC switches: 4x1G/10G SFP/SFP+ EX4100-48MP switches: 4x1G/10G SFP/SFP+ EX4100-24MP switches: 4x1G/10G SFP/SFP+	PIC 2	SFP/SFP+ uplink ports	#id-ex4100-switches-hardware-overview
Xcvr (`n`)	Abbreviated name of the transceiver	`n` is a value equivalent to the number of the port in which the transceiver is installed.	Optical transceivers	Pluggable Transceivers and Cables Supported on EX4100 and EX4100-F Switches.
Power supply (`n`)	One of the following: JPSU-920W-AC-AFO JPSU-150W-AC-AFO JPSU-150W-DC-AFO JPSU-150W-AC-AFI JPSU-850W-AC-AFO JPSU-90W-AC-AFO JPSU-65W-AC-AFO JPSU-450W-AC-AFO	`n` has a value 0 or 1, corresponding to the power supply slot number.	AC power supply or DC power supply	AC Power Supply in EX4100 and EX4100-F Switches DC Power Supply in EX4100 Switches
Fan tray	One of the following: Fan Module, Airflow In (AFI) Fan Module, Airflow Out (AFO)	`n` has a value 0 or 1, corresponding to the fan module slot number.	Fan module	Cooling System and Airflow in an EX4100 and EX4100-F Switch

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