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xbernardJul 28, 2025
What to do if the Juniper QFX Switch RE /var partition is full?
- CcgibsonJul 28, 2025
If the /var partition on your Juniper Switch RE is full, you should clean up the system file storage space on the switch.
What to do if the Juniper QFX Switch RE /var partition is full?
If the /var partition on your Juniper Switch RE is full, you should clean up the system file storage space on the switch.
What to do if the Juniper QFX fan fails?
If a fan module fails in your Juniper switch, replace the fan module and report the failure to customer support.
How to fix a Juniper QFX Switch PEM that is not powered?
If a PEM (power entry module) in your Juniper switch is not powered, check the power cord connection and reconnect it if necessary.
What to do if Management Ethernet 1 Link is down on Juniper QFX?
If the Management Ethernet 1 link is down on your Juniper switch, verify that a cable is properly connected to the management Ethernet interface and ensure that the cable is not defective. Replace the cable if needed.
What to do if FPC Management1 Ethernet Link is down on Juniper QFX Switch?
If the FPC Management1 Ethernet link is down, check if a cable is connected to the management Ethernet interface, or if the cable is defective. Replace the cable, if required.
What to do if Fan/Blower is absent in Juniper QFX?
If a fan module is absent in your Juniper switch, install fan modules in the empty slots.
General| Category | Switch |
|---|---|
| Series | QFX |
| Form Factor | 1U, 2U, and modular chassis options |
| Power Supply | Redundant, hot-swappable power supplies |
| Cooling | hot-swappable fans |
| Virtual Chassis | Supported on certain models |
| Typical Use | Data center, cloud |
| Operating System | Junos OS |
| Management | CLI |
| Key Features | High performance, low latency, automation |
| Latency | Sub-microsecond latency |
| Port Density | Varies by model (e.g., QFX5100: up to 48x10GbE + 6x40GbE) |
Introduces the QFX Series QFabric System architecture, contrasting it with legacy multi-tiered data centers.
Explains the single-layer networking tier connecting servers and storage across a high-speed, unified core fabric.
Details the role of the Director group in providing management services for the QFabric system.
Explains how interconnect devices enable Node devices to connect over a high-speed backplane.
Describes how Node devices connect servers, storage, and external networks to the QFabric system.
Provides an overview of the QFX3100 Director device used to manage the QFX3000-G QFabric system.
Details the components that can be replaced at your site, focusing on hot-insertable/removable FRUs.
Summarizes the physical specifications, including dimensions and weight, of the QFX3100 Director device.
Explains the cooling system and airflow characteristics of the QFX3100 Director device.
Describes the QFX3008-I Interconnect device as a half-rack chassis for data plane switching.
Details the physical specifications of the QFX3008-I Interconnect device chassis.
Explains the cooling system, including fan trays and air filters, for proper airflow.
Describes the Control Board's role in performing Routing Engine functions and its interfaces.
Introduces the QFX3500 device as a high-speed switch for next-generation data centers.
Provides physical specifications for the QFX3500 device chassis.
Details the cooling system and airflow directions for different QFX3500 device models.
Describes the AC power supply as a hot-removable FRU and its specifications.
Considers factors like device count, location, and rack requirements for QFabric system deployment.
Provides guidelines for efficient device operation and preventing environmentally caused failures.
Details factors to consider when planning the electrical wiring at the site.
Specifies required environmental conditions for normal operation of the QFX3100 Director device.
Details rack requirements including type, hole spacing, size, strength, and building connection.
Specifies cabinet size, clearance, and airflow requirements for the QFX3008-I Interconnect device.
Outlines necessary clearance around the device for airflow and maintenance.
Lists tested and supported USB flash drives for QFX Series devices.
Provides pinout information for the RJ-45 console connector.
Describes optical interfaces supported by SFP+ transceivers and copper interface for SFP.
Details interface specifications for SFP transceivers used in QFabric system control plane.
Lists specifications for RJ-45 patch cables used for QFabric system control plane.
Explains how signal loss, attenuation, and dispersion affect fiber-optic transmission.
Provides steps to calculate the link's power budget for planning fiber-optic cable layout.
Details the AC power specifications for the QFX3100 Director device.
Lists AC power system specifications for single-phase wiring trays.
Lists AC power system specifications for three-phase delta wiring trays.
Details power requirements for different hardware components under typical voltage conditions.
Provides AC power specifications for the QFX3500 device.
Details DC power specifications for the QFX3500 device.
Lists the safety and EMC standards the QFX Series complies with.
Describes EMC requirements for different regions like Canada, Europe, Japan, and USA.
Provides guidelines for ensuring safety and protecting the device from damage.
Outlines procedures for protecting people and equipment during a fire emergency.
Warns about avoiding exposure to invisible radiation from port apertures.
Provides safety guidelines and warnings for devices equipped with laser transmitters.
Advises to read installation instructions before connecting the device to a power source.
Provides guidelines for safely lifting and moving the QFX3100 Director device.
Provides guidelines for safely lifting and moving the QFX3008-I Interconnect device.
Provides precautions for ensuring system stability when mounting or servicing devices in racks.
Provides general guidelines for safe operation of devices with AC and DC power.
Details guidelines to minimize potential for electrostatic discharge (ESD) damage to components.
Covers electrical safety guidelines for devices with AC power supplies.
Provides safety guidelines for DC-powered devices and their connections.
Provides an overview of the steps to install and configure the QFX3000 QFabric system.
Provides step-by-step instructions for installing and connecting the QFX3100 Director device.
Details the procedure for unpacking the QFX3100 Director device from its shipping carton.
Explains how to mount the QFX3100 Director device on two-post racks using provided brackets.
Guides on connecting AC power to the QFX3100 Director device's power supplies.
Provides instructions for installing and connecting the QFX3008-I Interconnect device.
Details the procedure for unpacking the QFX3008-I Interconnect device.
Explains how to install mounting hardware for four-post racks or cabinets.
Provides instructions for connecting the device to earth ground for safety and EMI requirements.
Guides on connecting AC power using single-phase wiring trays.
Describes how to install the optional cable management system on the chassis.
Explains how to install optional lockable front doors to secure the front card cage.
Provides instructions for installing and connecting the QFX3500 device.
Details how to mount the QFX3500 device on four-post racks using provided brackets.
Guides on connecting AC power to the QFX3500 device's power supply.
Provides instructions for connecting DC power to the QFX3500 device.
Explains how to connect two Virtual Chassis for control plane redundancy.
Details how to interconnect two QFX3100 Director devices for redundancy.
Describes connecting Director devices to the Virtual Chassis for control plane network.
Explains connecting QFX3008-I Interconnect Devices to Virtual Chassis for control plane.
Describes connecting QFX3500 Node devices to Virtual Chassis for control plane network.
Guides on connecting QFX3500 Node devices to QFX3008-I Interconnect devices for data plane.
Details the initial setup procedure for the QFX3100 Director group via console.
Procedure to power off a QFX3100 Director device before removal or maintenance.
Procedure to power off a QFX3008-I Interconnect device before removal or maintenance.
Details the procedure for relocating an installed QFX3100 Director device.
Explains how to remove an installed QFX3008-I Interconnect device from a rack or cabinet.
Describes how the Director group recognizes and adds replacement devices to the QFabric system.
Explains how to add or replace QFX3008-I Interconnect devices in a QFX3000-G QFabric system.
Details the installation and removal of field-replaceable units (FRUs) for the QFX3100 Director device.
Provides instructions for removing the AC power supply from the rear panel.
Guides on installing the AC power supply into the rear panel power supply slot.
Details the procedure for removing a fan module from the rear panel.
Guides on installing a fan module into the fan module slot on the rear panel.
Explains how to remove a network module from the front panel.
Guides on installing a network module into the network module slot on the front panel.
Details the procedure for removing a hard disk drive (HDD) module from the front panel.
Guides on installing a hard disk drive (HDD) module into the front panel slot.
Provides instructions for removing the AC power supply from the chassis rear slots.
Guides on installing the AC power supply into the chassis rear slots.
Details the procedure for removing a wiring tray from the chassis rear.
Guides on installing a wiring tray into the chassis rear slot.
Explains how to remove the bottom fan tray and front panel display.
Guides on installing the bottom fan tray and front panel display.
Details the procedure for removing a side fan tray from the chassis.
Guides on installing a side fan tray into the chassis.
Explains how to remove the top fan tray from the chassis.
Guides on installing the top fan tray into the chassis.
Details the procedure for removing the bottom air filter.
Guides on installing the bottom air filter into the chassis.
Explains how to remove a side air filter from the chassis.
Guides on installing a side air filter into the chassis.
Procedure to take a Control Board offline before removal to preserve configuration.
Details the procedure for removing a Control Board from the chassis rear slots.
Guides on installing a Control Board into the chassis rear slots.
Recommends taking a 16-port QSFP+ front card offline before removal to prevent data loss.
Details the procedure for removing a 16-port QSFP+ front card.
Guides on installing a 16-port QSFP+ front card into the chassis front slots.
Recommends taking a rear card offline before removal to preserve its configuration.
Details the procedure for removing a rear card from the chassis rear slots.
Guides on installing a rear card into the chassis rear slots.
Details the installation and removal of field-replaceable units (FRUs) for the QFX3500 device.
Guides on installing a power supply into the QFX3500 device front panel.
Details the procedure for removing a power supply from the QFX3500 device.
Guides on installing a fan tray into the QFX3500 device.
Details the procedure for removing a fan tray from the QFX3500 device.
Guides on installing a management board into the QFX3500 device front panel.
Details the procedure for removing a management board from the QFX3500 device.
Provides instructions for removing a transceiver from a QFX Series device.
Guides on installing a transceiver into a QFX Series device.
Details the procedure for disconnecting a fiber-optic cable from a transceiver.
Guides on connecting a fiber-optic cable to an optical transceiver.
Explains how to check and replace air filters regularly for optimal device performance.
Provides guidelines for maintaining fiber-optic cables to ensure proper connections.
Describes the chassis status LEDs on the bottom left of the front panel.
Explains the LEDs on the management port indicating link/activity and speed.
Details the LEDs on the network module ports indicating link speed and activity.
Describes the bicolored power supply status LED on the AC power supply faceplate.
Describes the chassis status LEDs on the front panel of the QFX3008-I Interconnect device.
Explains the LEDs on the Control Board front panel indicating status, link, and activity.
Details the LEDs on the 16-port QSFP+ front card indicating status and activity.
Describes the LEDs on the rear card indicating status and activity.
Explains the LEDs on the AC power supply faceplate indicating status.
Details the LEDs on the wiring tray faceplate indicating power status.
Describes the chassis status LEDs on the management board next to the LCD panel.
Explains the LEDs on the management ports indicating link speed and activity.
Shows the location of LEDs on the SFP+ access ports and QSFP+ uplink ports.
Shows the location of the LED on the fan tray.
Details the LEDs on the AC power supply faceplate indicating status.
Describes the LEDs on the DC power supply faceplate.
Provides a procedure to create an emergency boot device for Junos OS recovery.
Details recovery installation using an emergency boot device for software damage.
Explains how to perform a recovery installation on the Director group for damaged software.
Describes recovery installation with or without access to the QFabric system default partition.
Provides the procedure for returning a QFX3100 Director device for repair or replacement.
Explains how to locate the serial number for repair or replacement purposes.
Details how to pack the item for shipping, including ESD precautions.
Provides the procedure for returning a QFX3008-I Interconnect device for repair or replacement.
Explains how to locate the serial number for repair or replacement purposes.
Details how to pack the item for shipping, including ESD precautions.
Provides the procedure for returning a QFX3500 device for repair or replacement.
Explains how to locate the serial number for repair or replacement purposes.
Details how to pack the item for shipping, including ESD precautions.
Guides on obtaining an RMA number from Juniper Networks Technical Assistance Center (JTAC).
Provides a list of alarm terms and definitions for device monitoring.
Details chassis alarms indicating device or component failures.
Lists chassis alarm messages and their recommended actions for QFX3500 devices.
Describes configuring interface link-down conditions to trigger alarms.
