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QFX-SFP-10GE-LR: Juniper QFX 10GBASE-LR SFP+ Optical Transceiver Module

Juniper QFX-SFP-10GE-LR Transceiver10GbESFP+
JuniperTransceivers

Also listed as: 740-031981, FTLX1474D3BCL-J1

The Juniper QFX-SFP-10GE-LR is a 10GBASE-LR SFP+ optical transceiver delivering 10 Gigabit Ethernet up to 10 kilometers over single mode fibre for data center fabrics.

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Specifications

Part numberQFX-SFP-10GE-LR
BrandJuniper
TypeTransceivers
Other numbers740-031981, FTLX1474D3BCL-J1
Statuscurrent
Form factorSFP+
Speed10GbE
Wavelength nm1,310
ConnectorLC duplex
Cable typeSingle Mode Fibre
Max distance m10,000

About the QFX-SFP-10GE-LR

The Juniper QFX-SFP-10GE-LR optical transceiver provides long-distance 10 Gigabit Ethernet connectivity for data center campus interconnects and inter-facility spine fabrics. Utilizing a 1310 nanometer DFB laser transmitter over single mode optical fibre, it achieves clean signal transport up to 10 kilometers without requiring external optical amplifiers.

Compatibility

Compatible with Juniper QFX5100, QFX5110, QFX5120, QFX5200 Series switches, MX Series edge routers, and enterprise SRX firewalls. It integrates with Junos OS CLI and Junos Space management platforms for comprehensive telemetry and diagnostic event tracking.

How to identify a genuine unit

Housed in an SFP+ metallic enclosure featuring a blue extraction latch bail designating longwave single mode optical operation. The top label clearly shows Juniper Networks, part number QFX-SFP-10GE-LR, engineering number 740-031981, and laser safety class 1 compliance.

Buying used

Examine the dual LC optical receptacle for mechanical integrity and clean lens surfaces. Test the module in a Junos switch to ensure instantaneous optical link establishment and confirm that transmitter power output registers between minus 8.2 and plus 0.5 dBm.

Fits these models

Works together

How the Juniper QFX-SFP-10GE-LR connects to servers, storage and the network: 3 ways, with the hardware on each path.

iSCSI and NVMe/TCP over EthernetFile storage (NFS and SMB)Hyperconverged cluster

iSCSI and NVMe/TCP over Ethernet

Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.

Adapters for the server

Switches

Storage

iSCSI and NVMe/TCP over Ethernet: how it fits together

File storage (NFS and SMB)

Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.

Adapters for the server

Switches

Storage

File storage (NFS and SMB): how it fits together

Hyperconverged cluster

Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.

HCI nodes

Adapters for the server

Switches

Hyperconverged cluster: how it fits together

Plan and size it

Check compatibility with Juniper

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Juniper has tested with the Juniper QFX-SFP-10GE-LR.

FAQ

What is the maximum optical distance of QFX-SFP-10GE-LR?

It supports transmission distances up to 10 kilometers over standard single mode fibre.

Does this optic support Digital Optical Monitoring?

Yes, it reports optical power levels, laser bias current, and module temperature in Junos OS.

Buying or selling QFX-SFP-10GE-LR?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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