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QFX-SFP-25G-LR: Juniper 25GBASE-LR SFP28 Optical Transceiver Module

Juniper QFX-SFP-25G-LR Transceiver25GbESFP28
JuniperTransceivers

Also listed as: 740-063232, FTLX1475D3BCL-J1

The Juniper QFX-SFP-25G-LR is a 25GBASE-LR SFP28 optical transceiver supporting 25 Gigabit Ethernet up to 10 kilometers over single mode fibre for enterprise spine links.

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Specifications

Part numberQFX-SFP-25G-LR
BrandJuniper
TypeTransceivers
Other numbers740-063232, FTLX1475D3BCL-J1
Statuscurrent
Form factorSFP28
Speed25GbE
Wavelength nm1,310
ConnectorLC duplex
Cable typeSingle Mode Fibre
Max distance m10,000

About the QFX-SFP-25G-LR

The Juniper QFX-SFP-25G-LR optical transceiver offers high performance 25 Gigabit Ethernet connectivity across metropolitan networks and data center campus backbones. Operating at 1310 nanometers on single mode optical fibre, it enables low latency high bandwidth connections up to 10 kilometers for distributed spine leaf architectures.

Compatibility

Compatible with Juniper QFX5120, QFX5200, QFX5220 switches, and MX Series routing platforms equipped with SFP28 ports. It integrates seamlessly with Junos OS telemetry tools for active monitoring of optical receive power and transmitter operating temperature.

How to identify a genuine unit

Housed in an SFP28 metallic shell featuring a blue extraction latch bail that designates longwave single mode optical transmission. The top label bears Juniper Networks branding, part number QFX-SFP-25G-LR, assembly code 740-063232, and regulatory safety markers.

Buying used

Inspect optical lenses for scratch marks or debris using a fiber inspection tool. Connect the module to a 25GbE SFP28 port with RS-FEC configured to verify immediate link synchronization and validate that optical power telemetry values remain within normal operational limits.

Fits these models

Works together

How the Juniper QFX-SFP-25G-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-25G-LR.

FAQ

What is the transmission reach of the QFX-SFP-25G-LR optic?

It supports links up to 10 kilometers over standard G.652 single mode fibre.

What connector type does this module require?

It uses an industry standard dual LC optical connector interface.

Buying or selling QFX-SFP-25G-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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