SFP-25G-LR-AR: Arista 25GBASE-LR SFP28 Optical Transceiver Module
Also listed as: SFP-25G-LR, SFP-25G-LR-C
The Arista SFP-25G-LR-AR is a 25GBASE-LR SFP28 optical transceiver delivering 25 Gigabit Ethernet up to 10 kilometers over single mode fibre for 7050X3 and 7280R Series switches.
Specifications
| Part number | SFP-25G-LR-AR |
|---|---|
| Brand | Arista |
| Type | Transceivers |
| Other numbers | SFP-25G-LR, SFP-25G-LR-C |
| Status | current |
| Form factor | SFP28 |
| Speed | 25GbE |
| Wavelength nm | 1,310 |
| Connector | LC duplex |
| Cable type | Single Mode Fibre |
| Max distance m | 10,000 |
About the SFP-25G-LR-AR
The Arista SFP-25G-LR-AR optical transceiver delivers high performance 25 Gigabit Ethernet connectivity across metropolitan networks and data center campus interconnects. Operating at a central wavelength of 1310 nanometers over standard single mode fibre, it supports high bandwidth spine leaf interconnections up to 10 kilometers.
Compatibility
Compatible with Arista 7050X3, 7060X, 7260X, 7280R, and 7500R Series switches equipped with SFP28 interfaces. It integrates natively with Arista EOS telemetry and monitoring tools, supporting real-time Digital Optical Monitoring of optical transmit and receive power levels.
How to identify a genuine unit
Packaged in an SFP28 metallic shell featuring a blue extraction latch bail that designates longwave single mode optical transmission. The top label bears Arista Networks branding, part number SFP-25G-LR, individual serial number barcode, and laser safety compliance markings.
Buying used
Inspect optical lenses for scratch marks or debris using a fiber microscope. Connect the module to an active SFP28 port with RS-FEC configured to verify immediate link synchronization and check that optical power telemetry values remain within normal factory tolerances.
Fits these models
- Arista 7050X 7050SX3-48YC8
- Arista 7280R 7280CR3-32D4
- Arista 7280R 7280CR3-32P4
- Arista 7280R 7280SR3-48YC8
- Arista 7500 7504
- Arista 7500E 7504E
- Arista 7500R 7504R
- Arista 7500R3 7504R3
- Arista 7500 7508
- Arista 7500E 7508E
- Arista 7500R 7508R
- Arista 7500R3 7508R3
- Arista 7500R 7512R
- Arista 7800R3 7804R3
- Arista 7800R3 7808R3
- Arista 7800R3 7816R3
Works together
How the Arista SFP-25G-LR-AR 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 PowerMax 2500 4U multi-node rack
Dell PowerMax 8500 system bay multi-enclosure
Dell PowerProtect DD6400 2U appliance
Dell PowerProtect DD6900 2U appliance + shelves
Dell PowerProtect DD9400 2U appliance + shelves
Dell PowerProtect DD9410 2U appliance + shelves
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 A3000 4U 4-node chassis
Dell PowerScale F200 1U rack
Dell PowerScale F210 1U node
Dell PowerScale F600 1U rack
Dell PowerScale F900 2U rack
Hyperconverged cluster
Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.
HCI nodes
Dell VxRail D560 1U short-depth rack
Dell VxRail D560F 1U short-depth rack
Dell VxRail E660 1U rack
Dell VxRail E660F 1U rack
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-LR-AR.
- Compatibility Arista transceivers and cables
- Support Arista Support
FAQ
What is the maximum optical transmission distance for SFP-25G-LR-AR?
It supports links up to 10 kilometers over standard G.652 single mode optical fibre.
Does this transceiver require Forward Error Correction?
Yes, host ports must enable IEEE 802.3by RS-FEC or Base-R FEC to achieve full 10km link performance.
Buying or selling SFP-25G-LR-AR?
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 Transceiver and Cable Guide, checked 2026-10-27