SFP-25G-SR-S: Cisco 25GBASE-SR SFP28 Optical Transceiver
Also listed as: 10-3132-01, SFP-25G-SR-S=
The Cisco SFP-25G-SR-S is a 25GBASE-SR SFP28 optical module for 25 Gigabit Ethernet links over multimode fibre in enterprise data centers.
Specifications
| Part number | SFP-25G-SR-S |
|---|---|
| Brand | Cisco |
| Type | Transceivers |
| Other numbers | 10-3132-01, SFP-25G-SR-S= |
| Status | current |
| Form factor | SFP28 |
| Speed | 25GbE |
| Wavelength nm | 850 |
| Connector | LC duplex |
| Cable type | Multimode Fibre |
| Max distance m | 100 |
About the SFP-25G-SR-S
The Cisco SFP-25G-SR-S is an S-Class 25GBASE-SR optical transceiver engineered for enterprise data centers and campus backbones. Operating at 850nm over multimode fibre, it provides reach up to 100 meters on OM4 cabling and 70 meters on OM3 cabling. It delivers high-density 25GbE server access and switch uplinks with low power consumption.
Compatibility
Compatible with Cisco Nexus 9000 Series switches including the Nexus 93180YC-FX and Nexus 93180YC-FX3. It connects to 25GbE server network adapters and storage targets, supporting lossless RoCE v2 and iSCSI transport. It integrates directly into Cisco NX-OS switching architectures without requiring specialized firmware patches.
How to identify a genuine unit
Distinguished by an SFP28 metal enclosure with a beige or orange release bail and Cisco factory label. The label indicates part number SFP-25G-SR-S, serial barcode, and optical compliance standards. The module reports internal temperature, voltage, and optical metrics via digital diagnostics in NX-OS.
Buying used
Check the optical bore surfaces for dust contamination and ensure the mechanical latch locks firmly in place. Plug the unit into a 25GbE port to verify that NX-OS authenticates the S-Class transceiver without generating unsupported transceiver system log messages.
Fits these models
Works together
How the Cisco SFP-25G-SR-S connects to servers, storage and the network: 3 ways, with the hardware on each path.
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
BCM957414A4142CC Broadcom NetXtreme-E BCM57414 Dual-Port 25GbE SFP28 PCIe 3.0 Ethernet Network Adapter
540-BBGY Dell Broadcom 57414 Dual Port 10/25GbE SFP28 PCIe Low Profile Network Adapter
540-BBHB Dell Broadcom 57414 Dual Port 10/25GbE SFP28 OCP 3.0 Mezzanine Network Adapter
540-BBJL Dell Mellanox ConnectX-4 Lx Dual Port 25GbE SFP28 Network Daughter Card (rNDC)
Switches
cisco Nexus 3000 Nexus 31108PC-V 1U fixed switch
cisco Nexus 3000 Nexus 34180YC 1U fixed switch
cisco Nexus 9000 Nexus 93240YC-FX2 1.2U fixed switch
cisco Nexus 9000 Nexus 9336C-FX2 1U fixed switch
Storage
Dell PowerStore 1000T 2U rack
Dell PowerStore 1000X 2U rack
Dell PowerStore 1200T 2U rack
Dell PowerStore 3000T 2U rack
Dell PowerStore 3200T 2U rack
Dell PowerStore 5000T 2U rack
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
- BCM957414A4142CC Broadcom NetXtreme-E BCM57414 Dual-Port 25GbE SFP28 PCIe 3.0 Ethernet Network Adapter
- 540-BBGY Dell Broadcom 57414 Dual Port 10/25GbE SFP28 PCIe Low Profile Network Adapter
- 540-BBHB Dell Broadcom 57414 Dual Port 10/25GbE SFP28 OCP 3.0 Mezzanine Network Adapter
- 540-BBJL Dell Mellanox ConnectX-4 Lx Dual Port 25GbE SFP28 Network Daughter Card (rNDC)
Switches
- cisco Nexus 3000 Nexus 31108PC-V 1U fixed switch
- cisco Nexus 3000 Nexus 34180YC 1U fixed switch
- cisco Nexus 9000 Nexus 93240YC-FX2 1.2U fixed switch
- cisco Nexus 9000 Nexus 9336C-FX2 1U fixed switch
Storage
Dell PowerScale A300 4U
Dell PowerScale F200 1U rack
Dell PowerScale F600 1U rack
Dell PowerScale F900 2U rack
Dell PowerScale H700 4U- Dell PowerStore 1000T 2U rack
Hyperconverged cluster
Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.
HCI nodes
HPE SimpliVity 325 Gen10 Plus v2 1U rack
HPE SimpliVity 380 Gen10 G 2U rack
Lenovo ThinkAgile VX650 V2 2U rack
Dell VxRail E Series E560 1U rack (1 node)
Adapters for the server
- BCM957414A4142CC Broadcom NetXtreme-E BCM57414 Dual-Port 25GbE SFP28 PCIe 3.0 Ethernet Network Adapter
- 540-BBGY Dell Broadcom 57414 Dual Port 10/25GbE SFP28 PCIe Low Profile Network Adapter
- 540-BBHB Dell Broadcom 57414 Dual Port 10/25GbE SFP28 OCP 3.0 Mezzanine Network Adapter
- 540-BBJL Dell Mellanox ConnectX-4 Lx Dual Port 25GbE SFP28 Network Daughter Card (rNDC)
Switches
- cisco Nexus 3000 Nexus 31108PC-V 1U fixed switch
- cisco Nexus 3000 Nexus 34180YC 1U fixed switch
- cisco Nexus 9000 Nexus 93240YC-FX2 1.2U fixed switch
- cisco Nexus 9000 Nexus 9336C-FX2 1U fixed switch
Plan and size it
- Draw this setup in the topology planner mrplanb.com
- Add up rack power and space rack-density.com
- iSCSI explained mrplanb.com
- Virtualization storage Ledger: scored storage platforms mrplanb.com
- Network monitoring tools compared mrplanb.com
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-SR-S.
- Compatibility Cisco UCS Hardware Compatibility List
- Compatibility Cisco Optics-to-Device Compatibility Matrix
- Support Cisco Support and Downloads
FAQ
What cable does SFP-25G-SR-S use?
It uses standard OM3 or OM4 multimode fibre with duplex LC connectors for up to 100 meters.
What is the difference between S-Class and standard Cisco optics?
S-Class optics are optimized for enterprise data centers with standard operating temperature ranges.
Buying or selling SFP-25G-SR-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.
Sources
- Cisco 25GBASE SFP28 Modules Data Sheet, checked 2026-10-27