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Troubleshoot the SRX4120

This topic contains some common troubleshooting resources for the SRX4120 and a list of alarms and how to fix them.

Troubleshooting Resources for SRX4120

Use the LEDs on the components to identify alarm conditions and the Junos OS CLI to troubleshoot the device. You can also contact the Juniper Networks® Technical Assistance Center (JTAC) for support.

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

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

    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 in this guide, contact JTAC.

Alarm Types and Alarm Severity

Table 1: Alarm Terms
Term

Definition

Alarm

A signal alerting you to conditions that might prevent normal operation. On a device, the alarm signal is the red system LED that is lit on the front of the chassis.

Alarm condition

A failure event that triggers an alarm.

Alarm severity

The seriousness of the alarm. The level of severity can be either major or minor.

Alarm Types

Table 2: Alarm Types
Term Definition

Chassis alarms

A predefined alarm triggered by a physical condition in the device such as a power supply failure or excessive component temperature.

Interface alarms

An alarm that you configure to alert you when an interface link is down. This applies to Ethernet, Fibre Channel, and management Ethernet interfaces. You can set the alarm as major or minor for a specific link-down condition or have the condition ignored.

System alarms

A predefined alarm that might be triggered by a missing rescue configuration, failure to install a license for a licensed software feature, or high disk usage. You can configure system alarms to appear automatically in the J-Web interface display or CLI display.

Alarm Severity

Table 3: Alarm Severity
Term Definition

Major (red)

Indicates a critical situation on the router that has resulted from one of the following conditions and that 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 (amber or blinking red)

Indicates a noncritical condition in the router that, if left unchecked, might cause an interruption in service or degradation in performance. A minor alarm condition requires monitoring or maintenance.

For example, a missing rescue configuration generates a minor system alarm.

Troubleshoot Chassis and Interface Alarms on the SRX4120 Firewall

Table 4 lists the chassis alarm messages on the SRX4120, their severity levels, and the actions you can take to respond to them.

Table 4: Alarm Conditions on the SRX4120

Component

Alarm Condition

Severity

Remedy

Boot media

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

Amber (minor)

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.

Hardware components

The firewall chassis temperature is too warm.

Amber (minor)

  • Check the room temperature. See Table 2.

  • Check the air flow. See Figure 1.

The firewall fan has failed.

Red (major)

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.

Use the RESET Button

If a configuration fails or denies management access to the firewall, you can use the RESET button to restore the device.

The RESET button is recessed to prevent it from being pressed accidentally. To press the RESET button, insert a small probe (such as a straightened paper clip) into the pinhole on the front panel.

  • Pressing the RESET button for about 250 milliseconds will reboot the device.
  • Pressing and holding the RESET button for more than 10 seconds will reboot the device and recover the primary BIOS.