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

Juniper QFX-SFP-25G-SR Transceiver25GbESFP28
JuniperTransceivers

Also listed as: 740-063231, FTLF8536P4BCL-J1

The Juniper QFX-SFP-25G-SR is a 25GBASE-SR SFP28 optical transceiver providing 25 Gigabit Ethernet connectivity up to 100 meters over OM4 multimode fibre for QFX switches.

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Specifications

Part numberQFX-SFP-25G-SR
BrandJuniper
TypeTransceivers
Other numbers740-063231, FTLF8536P4BCL-J1
Statuscurrent
Form factorSFP28
Speed25GbE
Wavelength nm850
ConnectorLC duplex
Cable typeMultimode Fibre
Max distance m100

About the QFX-SFP-25G-SR

The Juniper QFX-SFP-25G-SR optical transceiver delivers 25 Gigabit Ethernet transmission for next generation cloud data centers and high throughput compute server clusters. Transmitting over 850 nanometer multimode optical fibre up to 100 meters on OM4, it provides 2.5 times the bandwidth of standard 10GbE links using the familiar compact SFP form factor.

Compatibility

Compatible with Juniper QFX5120-48Y, QFX5200, QFX5210, QFX5220, MX304, and MX10003 networking platforms. It plugs directly into SFP28 ports and supports backward operational capability to 10GbE speeds when interfaced with compatible 10GBASE-SR optics.

How to identify a genuine unit

Enclosed in an SFP28 metal casing featuring an orange or black extraction latch bail indicating short-reach multimode optics. The manufacturer label identifies the component as QFX-SFP-25G-SR with Juniper assembly number 740-063231 and serial tracking barcode.

Buying used

Inspect the optical bore with a fiber microscope to verify clean optical surfaces. Test the module in a 25GbE switch port with FEC enabled to confirm error-free packet reception, stable optical link synchronization, and proper digital optical monitoring telemetry.

Fits these models

Works together

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

FAQ

What is the maximum reach of the QFX-SFP-25G-SR optic?

It supports links up to 70 meters on OM3 multimode fibre and 100 meters on OM4 multimode fibre.

Does this transceiver require Forward Error Correction?

Yes, host ports must enable IEEE 802.3by Reed-Solomon FEC (RS-FEC) or Base-R FEC to meet specified error rate targets.

Buying or selling QFX-SFP-25G-SR?

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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