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Troubleshoot the SRX2300

Troubleshooting Resources for the SRX2300 Firewall

To troubleshoot a device, you use the Junos OS CLI and LEDs on the components:

  • LEDs—When the device detects an alarm condition, the alarm LED on the interfaces glows red or yellow.

  • CLI—The CLI is the primary tool for controlling and troubleshooting hardware, Junos OS, and network connectivity. Use the CLI to see more information about alarms. CLI command outputs display information about network connectivity, which Junos derives from the ping and traceroute utilities.

    For information about using the CLI to troubleshoot Junos OS, see the appropriate Junos OS configuration guide.

  • JTAC—If you need assistance during troubleshooting, you can contact the Juniper Networks Technical Assistance Center (JTAC) by using the Web or by telephone. If you encounter software problems, or problems with hardware components not discussed here, contact JTAC.

Troubleshooting Chassis and Interface Alarm Messages on the SRX2300 Firewall

When the firewall detects an alarm condition, the alarm LED on the interfaces glows red or yellow on the front panel as appropriate. To view a more detailed description of the alarm cause, issue the show chassis alarms command.

Alarm messages belong to two classes:

  • Chassis alarms—Indicate a problem with a chassis component such as the cooling system or PSU.

  • Interface alarms—Indicate a problem with a specific network interface.

For more information about the show chassis alarms command, see Network Management and Monitoring Guide.

Table 1 describes alarms that can occur for a firewall chassis component.

Table 1: Alarms for Firewall Chassis Components


Alarm Conditions


Alarm Severity

Boot media

If the internal flash fails at startup, the firewall automatically boots from the alternative boot device (USB storage device).

If you configured the firewall to boot from an alternative boot device, ignore this alarm condition.

If you did not configure the firewall to boot from an alternative boot device, contact JTAC.

Yellow (minor)

Hardware components on the firewall

The firewall chassis temperature is too warm.

Yellow (minor)

The firewall fan has failed.

Place your hand near the exhaust vents at the rear of the chassis to determine whether the fan is pushing air out of the chassis.

Red (major)


For more information about alarms, see the Junos OS Monitoring and Troubleshooting for Security Devices Guide.

Troubleshooting the Power System on the SRX2300

The LEDs on the firewall enable you to determine the performance and operation of the power system. The PWR LED located on the front panel of the firewall, as described in Chassis Status LEDs, indicates the different status settings of the power system.

Table 2: PWR LED Description

LED Status

LED State


Possible Cause and Corrective Action



The firewall is receiving power, and all AC or DC power supply units (PSUs) are working properly.

The power system is normal and no action is required.



One or more PSUs have failed.

If you cannot determine the cause of the problem or need additional assistance:

  • Open a support case using the Service Request Manager link at

  • Call 1-888-314-JTAC (if you're within the United States) or 1-408-745-9500 (if you're outside the United States).

Blinking green


The firewall, which is in the bootup phase before Junos OS initialization, is receiving power.

The power system is normal and no action is required.



The firewall is not receiving power.

Issue the show chassis alarms command to determine the source of the problem.

  • Verify that the AC power cord or DC power supply cable is not damaged. If the insulation is cracked or broken, immediately replace the cord or cable.

  • Verify that the source circuit breaker has the proper current rating. Each PSU must be connected to a separate source circuit breaker.

  • Ensure that the power socket you are plugged into is in working condition.

  • Connect the PSU to a different power source with a new power cord or power cables. If the LEDs on the PSU indicate that the PSU is not functioning normally, replace the PSU with a spare.


If the system temperature exceeds the threshold, Junos OS shuts down all power supplies and the LED stops indicating the status.

Junos OS also can shut down one of the PSUs for other reasons. In this case, the remaining PSU provides power to the firewall. You can view the system status through the CLI.