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SFP-25G-LR-S: Cisco 25GBASE-LR SFP28 Optical Transceiver

Cisco SFP-25G-LR-S Transceiver25GbESFP28
CiscoTransceivers

Also listed as: 10-3133-01, SFP-25G-LR-S=

The Cisco SFP-25G-LR-S is an S-Class 25GBASE-LR optical transceiver supporting 25 Gigabit Ethernet connections over single mode fibre up to 10 kilometers in enterprise data centers.

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Specifications

Part numberSFP-25G-LR-S
BrandCisco
TypeTransceivers
Other numbers10-3133-01, SFP-25G-LR-S=
Statuscurrent
Form factorSFP28
Speed25GbE
Wavelength nm1,310
ConnectorLC duplex
Cable typeSingle Mode Fibre
Max distance m10,000

About the SFP-25G-LR-S

The Cisco SFP-25G-LR-S module provides high density 25 Gigabit Ethernet connectivity across single mode fibre spans in cloud and enterprise data centers. Operating at 1310 nanometers, it bridges campus buildings and facility data centers up to 10 kilometers. As an S-Class transceiver, it is engineered for standard commercial operating temperature environments with optimized power consumption and hardware lifecycle reliability.

Compatibility

Compatible with Cisco Nexus 9000 Series spine and leaf switches including Nexus 93180YC-FX, Nexus 93180YC-FX3, Nexus 93240YC-FX2, and Catalyst 9500 Series high performance aggregation platforms. It works in native 25GbE SFP28 interfaces and connects directly to single mode patch panels and long distance outside plant cabling systems.

How to identify a genuine unit

Distinguished by an SFP28 form factor metallic shell with a blue color coded release latch handle indicating 1310nm single mode optical performance. The manufacturer label identifies part number SFP-25G-LR-S, serial barcode, optical safety class rating, and Cisco manufacturing identifiers for inventory management.

Buying used

Inspect the physical alignment pins and clean the optical LC interface using an appropriate optical cassette cleaner. Insert the transceiver into a target switch running modern NX-OS software to ensure authentic recognition and verify that transmit power and receive power levels read within specified optical link budget tolerances.

Fits these models

Works together

How the Cisco SFP-25G-LR-S 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 Cisco

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Cisco has tested with the Cisco SFP-25G-LR-S.

FAQ

What is the maximum reach of SFP-25G-LR-S?

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

Can SFP-25G-LR-S interoperate with 10G ports?

It is optimized for 25GbE operation and requires dual-rate SFP28 ports when configured for multi-rate connectivity.

Buying or selling SFP-25G-LR-S?

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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Sources