Juniper QFX3500 Data Centre Switch: a flexible multipurpose switch for next generation data centres

TXO is one of the world’s leading stockists of spare parts and replacement components for the Juniper QFX3500 Data Centre Switch. We are also able to offer a full repair and refurbishment service for components within the Juniper QFX series of switches as well as offering ongoing advice to help support your existing Juniper QFX architecture. 

Get in touch with our multilingual team who will be happy to help support your needs.


Availability and shipping for the Juniper QFX3500 switch

At TXO we stock one of the largest selections of Juniper QFX3500 parts and components, as well as many other Juniper QFX series switches. Most QFX3500 parts will be dispatched immediately on receipt of purchase order and delivered within 1-3 days in the UK and 3-5 days for international delivery. Contact us today to get an exact quote and estimated delivery times for your order.


About the Juniper QFX3500

The Juniper Networks QFX3500 is a high-performance multipurpose switch designed specifically to handle the high demands of a next-generation data centre. Its core benefit lies in its flexibility, giving network operators the option of using it as a standalone switch or connecting to additional units as part of a QFabric system. 

Featuring forty-eight 10-Gbs access ports which use small form-factor pluggable plus (SFP+) transceivers operating as 10 gigabit ethernet interfaces by default, the Juniper QFX3500 can be alternatively configured so that 12 of the ports are used as 2, 4, 6 or 8 Gbps FC (Fibre Channel) interfaces, with the remaining 36 ports capable as running as 1-Gigabit Ethernet interfaces. 

Utilising QSFP+ (Quad Small Form factor pluggable plus) ports within four 40-Gbs uplink ports, the QFX3500 device is capable of operating as a stand alone switch. 4 SFP+ copper cables connected to the QSFP+’s, deliver an additional 15 10 Gigabit Ethernet interfaces. In this configuration the Cisco QFX3500 is capable of delivering high speed, low latency connectivity to Layer 2 devices such as ethernet switches or blade servers, and Layer 3 network devices such as routers. 

This platform also utulises the ability to function as both an FCoE-FC (Fibre Channel over Ethernet) gateway, acting as a proxy for an FCF switch, or as a FCoE Transit Switch whereby it implements FCoE Initialisation Protocol (FIP) Snooping. 

The QFX3500 is able to function as part of a QFX virtual chassis, whereby multiple standalone switches can be combined and managed as a single chassis. This gives the QFX series of switches exceptional flexibility in its configuration options. When used in Juniper’s QFabric system, the QFX3500 is able to function as a Node device acting as a multistage, non blocking switch fabric which provides a unified interconnect solution for even the most demanding data centre. 

As with all Juniper routers and switches, the Juniper QFX3500 runs the Juniper OS software. Installed on the unit’s 8-gigabyte internal flash drive, it provides Layer 2 and Layer 3 switching, security services and routing. It can be operated through the Junos OS command-line interface (CLI) when working as a standalone unit, or controlled through the administrator software when working as part of a QFabric system.

To ensure that the Juniper QFX3500 can be utilised in as many workspaces as possible, the unit is rack mountable and fits in an industry standard 19 inch rack mount, meaning it’s an ideal platform for those wishing to upgrade their existing architecture without worrying about additional space.   


Juniper QFX3500 Data Centre Switch component list

At TXO we have an extensive range of refurbished products and parts for the Juniper QFX3500 Data Centre Switch. A list of some of the most popular products can be found below, but please contact us if the part you require is not listed.


Part NumberDescription
QFX3500QFX3500 data centre switch
QFX3500-48S4QQFX3500 48s4q 48 Port Switch for the Juniper MX3500
QFX3500-RMARJuniper QFX3500 Rear Mouting Bracket
QFX3500-FANAIJuniper MX3500 Fan Module
QFX3500-MBJuniper QFX3500 Management Board
QFX3500-FANAI-AJuniper QFX3500 Fan Module A (intake)
QFX3500-FANAI-BJuniper QFX3500 Fan Tray
QFX3500-FANAI-CJuniper QFX3500 Cooling Fan
QFX3500-MB-CJuniper QFX3500 Management Board with RJ45 interface
PAR-SUP-QFX3500-ACRJuniper QFX3500 FRU-to-port airflow unit for front to back cooling


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Repair capability for the Juniper QFX3500 switch

TXO believes in supporting the circular economy and helping reduce the environmental impact of the telecoms sector. We therefore offer a full third-party repair service that aims to refurbish and repair as many parts and components for the Juniper QFX3500 as possible. 

We have an experienced team of highly qualified systems engineers who complete over 12,000 repairs every year operating from our advanced engineering facilities in Solihull. With years of experience conducting repairs on many components for the Juniper QFX3500, they have an in-depth knowledge of core telecoms repairs including optical, IP and radio-based technologies and can offer expert support on maintaining your existing systems and help prevent unnecessary downtime.  

As part of our expert service, we will often carry out pre-emptive repairs on Juniper components that are known to experience faults, therefore preventing the need for future repairs, further costly downtime and additional disruption to your business.  We are also able to offer an advance replacement service, to deliver you a replacement part prior to a repair being conducted meaning you can maintain optimum service levels to your customers. 

Check out the full list of platforms that we repair.


Technical specifications for the Juniper QFX3500

For full details of the Juniper QFX3500 platform please view the full OEM datasheet which can be found here.


Physical specifications
Chassis height1.74 in. (4.4 cm)
Chassis widthIncluding mounting brackets: 19 in. (48.3 cm)
Excluding mounting brackets: 17.4 in. (44.2 cm)
Chassis depthIncluding FRU handles and locking levers: 29.2 in. (74.2 cm)
Excluding FRU handles and locking levers: 28 in. (71.1 cm)
WeightWith FRUs installed: 30.8 lb (14 kg)
Without FRUs installed: 23.8 lb (11 kg)
AC power supply: 2.2 lb (1 kg)
Fan tray: 0.9 lb (0.4 kg)
Management board: 1.3 lb (0.6 kg)
AC Power Specifications
AC input voltageOperating range:
100–127 VAC
200–240 VAC
AC input line frequency50–60 Hz
AC input current rating7.8 A at 100–127 VAC
3.8 A at 200–240 VAC
Typical power consumption230 W
Maximum power consumption365 W
DC Power Specifications
DC input voltageMinimum operating voltage: –40 VDC
Nominal operating voltage: –48 VDC
Operating voltage range: –40 VDC through –72 VDC
DC input current rating7 A maximum at nominal operating voltage (–48 VDC)
Typical power consumption250 W
Maximum power consumption385 W


Please note, TXO is an independent retailer and has no affiliation with Juniper Networks, Inc. or any of its associated companies.