Troubleshoot QFX5120 Components
The QFX Series switches support different alarm types and severity levels. Table 1 provides a list of alarm terms and definitions that may help you in monitoring the device.
Table 1: Alarm Terms and Definitions
Signal alerting you to conditions that might prevent normal operation. On the device, alarm indicators might include the LCD panel and LEDs on the device. The LCD panel (if present on the device) displays the chassis alarm message count. Blinking amber or yellow LEDs indicate yellow alarm conditions for chassis components.
Failure event that triggers an alarm.
Alarm severity levels
Seriousness of the alarm. The level of severity can be either major (red) or minor (yellow).
Alarms include the following types:
Interface Alarm Messages
Interface alarms are alarms that you configure to alert you when an interface is down.
To configure an interface link-down condition to trigger a red or yellow alarm, or to configure the link-down condition to be ignored, use the alarm statement at the [edit chassis] hierarchy level. You can specify the ethernet, fibre-channel, or management-ethernet interface type.
Fibre Channel alarms are valid only on QFX3500 devices.
When red alarms or major alarms are issued on QFX5100 and EX4600 switches, the alarm LED glows amber instead of red.
By default, major alarms are configured for interface link-down conditions on the control plane and management network interfaces in a QFabric system. The link-down alarms indicate that connectivity to the control plane network is down. You can configure these alarms to be ignored using the alarm statement at the [edit chassis] hierarchy level.
If you configure a yellow alarm on the QFX3008-I Interconnect device, it will be handled as a red alarm.
Create an Emergency Boot Device
If Junos OS on the device is damaged in some way that prevents the software from loading properly, you can use an emergency boot device to repartition the primary disk and load a fresh installation of Junos OS. Use the following procedure to create an emergency boot device.
Before you begin, you need to download the installation media image for your device and Junos OS release from https://www.juniper.net/customers/support/.
In the following procedure, we assume that you are creating the emergency boot device on a switch. You can create the emergency boot device on another Juniper Networks switch or router, or any PC or laptop that supports Linux. The steps you take to create the emergency boot device vary, depending on the device.
To create an emergency boot device:
- Use FTP to copy the installation media image into the
/var/tmpdirectory on the device.
- Insert a USB device into the USB port.
- From the Junos OS CLI, start the shell:
user@device> start shell
- Switch to the root account using the su command:
The password is the root password for the device. If you logged in to the device as root, you do not need to perform this step.
- Enter the following command on the device:
root@device% dd if=/var/tmp/filename of=/dev/da0 bs=1048576
The device writes the installation media image to the USB device:
root@device% dd if=/var/tmp/install-media-host-usb-ex-4e-flex-x86-64-18.3R1.10-secure.img 11006+1 records in 11006+1 records out 180332544 bytes transferred in 71.764266 secs (2512846 bytes/sec)
- Log out of the shell:
Chassis Component Alarm Conditions on QFX5120 Switches
This topic describes the chassis component alarm conditions on QFX5120 switches.
Table 2 lists the alarms that the chassis components can generate on QFX5120 switches, their severity levels, and the actions you can take to respond to them.
Table 2: Chassis Component Alarm Conditions on QFX5120 Switches
A power supply is removed from the chassis.
Install a power supply in the empty slot.
A power supply output has failed.
Check power supply output connection.
A power supply has failed.
Replace the failed power supply.
An unknown power supply is installed.
Install a power supply recommended by Juniper Networks.
Mix of power supplies with different airflow directions.
Do not mix power supplies with different directions for the airflow in the same chassis.
Fan module is not installed.
Install the fan module.
A fan module has failed.
Replace the fan module.
Mix of fan modules with different airflow directions.
Do not mix fan modules with different directions for the airflow in the same chassis.
The temperature inside the chassis reaches the yellow or amber alarm limit.
Minor (yellow or amber)
The temperature inside the chassis reaches the red alarm limit.
|Management Ethernet interface|
Management Ethernet link is down
Rescue configuration is not set.
Minor (yellow or amber)
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 or amber)
Install the required license for the feature specified in the alarm.