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EX-SFP-10GE-SR: Juniper 10GBASE-SR SFP+ Optical Transceiver Module

Juniper EX-SFP-10GE-SR Transceiver10GbESFP+
JuniperTransceivers

Also listed as: 740-021308, EX-SFP-10GE-SR-ET, FTLX8571D3BCL-J1

The Juniper EX-SFP-10GE-SR is a 10GBASE-SR SFP+ optical transceiver delivering 10 Gigabit Ethernet connectivity up to 300 meters over OM3 multimode fibre for EX Series switches.

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Specifications

Part numberEX-SFP-10GE-SR
BrandJuniper
TypeTransceivers
Other numbers740-021308, EX-SFP-10GE-SR-ET, FTLX8571D3BCL-J1
Statuscurrent
Form factorSFP+
Speed10GbE
Wavelength nm850
ConnectorLC duplex
Cable typeMultimode Fibre
Max distance m300

About the EX-SFP-10GE-SR

The Juniper EX-SFP-10GE-SR optical transceiver provides high density 10 Gigabit Ethernet connectivity for enterprise campus distribution and data center access networks. Operating at a nominal optical wavelength of 850 nanometers over multimode fibre, it establishes reliable short-reach optical links between access layer switches, core aggregation frames, and server nodes.

Compatibility

Compatible with Juniper EX Series switches including EX2300, EX3400, EX4300, EX4400, EX4600, and EX4650 platforms. It interfaces natively with 10GbE SFP+ uplinks and dual-speed ports, and operates under Junos OS with full plug-and-play identification and optical diagnostic support.

How to identify a genuine unit

Enclosed in a standard SFP+ metal casing with a black optical extraction latch bail denoting 850nm short-reach optical optics. The top label displays the Juniper Networks logo, part number EX-SFP-10GE-SR, assembly number 740-021308, and laser safety compliance markings.

Buying used

Inspect the dual LC optical connector interface under an optical microscope for surface scratching or debris accumulation. Insert the module into a running Junos switch to verify that system inventory detects the transceiver and reports valid diagnostic optical power readings without framing errors.

Fits these models

Works together

How the Juniper EX-SFP-10GE-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 EX-SFP-10GE-SR.

FAQ

What is the optical transmission range of the EX-SFP-10GE-SR?

It supports links up to 300 meters on OM3 multimode fibre and up to 400 meters on OM4 multimode fibre.

Does this transceiver support Digital Optical Monitoring?

Yes, it supports real-time DOM telemetry reporting optical transmit and receive power in Junos OS.

Buying or selling EX-SFP-10GE-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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