Home › Parts › Arista part numbers

QSFP-100G-LR4-AR: Arista 100GBASE-LR4 QSFP28 Optical Transceiver Module

Arista QSFP-100G-LR4-AR Transceiver100GbEQSFP28
AristaTransceivers

Also listed as: QSFP-100G-LR4, QSFP-100G-LR4-C

The Arista QSFP-100G-LR4-AR is a 100GBASE-LR4 QSFP28 optical transceiver providing 100 Gigabit Ethernet connectivity up to 10 kilometers over single mode fibre for 7060X and 7280R switches.

Buy QSFP-100G-LR4-ARSell yours

Specifications

Part numberQSFP-100G-LR4-AR
BrandArista
TypeTransceivers
Other numbersQSFP-100G-LR4, QSFP-100G-LR4-C
Statuscurrent
Form factorQSFP28
Speed100GbE
Wavelength nm1,310
ConnectorLC duplex
Cable typeSingle Mode Fibre
Max distance m10,000

About the QSFP-100G-LR4-AR

The Arista QSFP-100G-LR4-AR optical transceiver delivers high performance 100 Gigabit Ethernet connectivity for long-reach data center interconnects and metropolitan campus backbones. It multiplexes four LAN-WDM optical wavelengths around 1310 nanometers over standard duplex single mode fibre, delivering full rate 100Gbps transport up to 10 kilometers.

Compatibility

Compatible with Arista 7050CX3, 7060CX, 7260CX3, 7280CR3, and 7500R Series modular switches. It integrates natively into QSFP28 switch interfaces and provides real-time telemetry diagnostics via Arista EOS command line and CloudVision telemetry collectors.

How to identify a genuine unit

Enclosed in a precision QSFP28 metal casing with a blue pull tab extraction mechanism indicating longwave single mode optics. The manufacturer label identifies part designation QSFP-100G-LR4, Arista branding, serial number, and international safety compliance marks.

Buying used

Inspect the duplex LC optical receptacle with an optical inspection scope to ensure lack of contamination. Mount into a live Arista switch port to confirm that all four internal DFB laser channels lock into frequency and show balanced optical output power.

Fits these models

Works together

How the Arista QSFP-100G-LR4-AR 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 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 QSFP-100G-LR4-AR.

FAQ

What is the maximum optical reach of QSFP-100G-LR4-AR?

It supports links up to 10 kilometers over standard single mode fibre.

Does this optic require Forward Error Correction?

Standard IEEE 100GBASE-LR4 does not mandate host FEC, but host ports may enable it for enhanced margin.

Buying or selling QSFP-100G-LR4-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.

Buy QSFP-100G-LR4-ARSell yours

Sources