SFP-25G-SR: Arista 25GBASE-SR SFP28 Optical Transceiver
Also listed as: SFP-25G-SR-AR
The Arista SFP-25G-SR is an SFP28 optical transceiver providing 25 Gigabit Ethernet links over multimode fibre up to 100 meters for Arista 7050X3 switches.
Specifications
| Part number | SFP-25G-SR |
|---|---|
| Brand | Arista |
| Type | Transceivers |
| Other numbers | SFP-25G-SR-AR |
| 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
The Arista SFP-25G-SR is an SFP28 optical module operating at 850nm over multimode optical cabling, providing 25 Gigabit Ethernet connectivity up to 100 meters on OM4 fibre and 70 meters on OM3 fibre. Built for high-performance cloud networks and IP storage clusters, it provides line-rate packet forwarding with low power consumption and high reliability.
Compatibility
Fully compatible with Arista 7050X3 and 7060X series data center switches, including model 7050SX3-48YC8. It communicates with 25GbE server adapters and storage targets supporting RoCE v2 and NVMe over TCP. It operates under Arista EOS without requiring third-party unlocking commands.
How to identify a genuine unit
Constructed with a metallic SFP28 enclosure and an integrated beige release bail clasp. The factory label displays Arista part code SFP-25G-SR, serial barcode, and regulatory marks. The module provides full digital optical monitoring accessible via show inventory in the Arista EOS CLI.
Buying used
When purchasing used Arista transceivers, check the optical receiver and transmitter windows for dust or oil contamination using a fibre scope. Verify that the module is recognized cleanly in Arista EOS without triggering interface error alarms. Check that optical transmit levels comply with factory data sheet limits.
Fits these models
Works together
How the Arista SFP-25G-SR 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
arista 7050X 7050SX3-48YC8 1U fixed switch
arista 7260X 7260CX3-64 2U fixed switch
arista 7280R 7280SR3-48YC8 1U fixed switch
arista 7500 7508 modular chassis
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
- arista 7050X 7050SX3-48YC8 1U fixed switch
- arista 7260X 7260CX3-64 2U fixed switch
- arista 7280R 7280SR3-48YC8 1U fixed switch
- arista 7500 7508 modular chassis
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
- arista 7050X 7050SX3-48YC8 1U fixed switch
- arista 7260X 7260CX3-64 2U fixed switch
- arista 7280R 7280SR3-48YC8 1U fixed switch
- arista 7500 7508 modular chassis
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 Arista
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Arista has tested with the Arista SFP-25G-SR.
- Compatibility Arista transceivers and cables
- Support Arista Support
FAQ
What fibre type is supported?
It supports OM3 (up to 70m) and OM4 (up to 100m) multimode fibre cabling.
Is digital optical monitoring supported?
Yes, DOM parameters can be inspected via Arista EOS CLI.
Buying or selling 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.
Sources
- Arista Transceivers and Cables Data Sheet, checked 2026-10-27