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Field-Replaceable Units in a QFX3500 Device

Field-replaceable units (FRUs) are components that you can replace at your site. The QFX3500 device FRUs except the management board are hot-insertable and hot-removable: you can remove and replace them without powering off the device or disrupting the switching function.


Replace a failed power supply with a blank panel or new power supply within 1 minute of removal to prevent chassis overheating. Replace a failed fan tray with a new fan tray within 1 minute of removal to prevent chassis overheating.

Table 1 lists the FRUs for the QFX3500 device and actions to take before removing them.

Table 1: FRUs in a QFX3500 Device


Required Action

Power supplies


Fan trays


Management board

You must power off the QFX3500 device before replacing the management board. See Removing a Management Board from a QFX3500 Device.

Optical transceivers

None. We recommend that you disable the interface using the set interfaces interface-name disable command before you remove the transceiver. See Disconnecting a Fiber-Optic Cable from a QFX Series Device.


If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.