Arista 400GBASE-LR4 OSFP Transceiver, 10 km Duplex Single-Mode

Ten kilometers at 400GbE over a duplex LC fiber pair is the rating of the Arista 400GBASE-LR4 OSFP Transceiver, part number OSFP-400G-LR4. It comes in the OSFP form factor and targets campus and metro links.

The OSFP cage is a requirement, not an option. Switches and adapters that use QSFP-style cages cannot accept this module, so check the port type on both ends. Supported-optics information from the manufacturer lists what each Arista platform allows.

A 10 km reach covers connections between sites in the same city or across a large campus without additional transport equipment. Because it uses a duplex LC connector, standard single-mode patch cords and panels apply. Measure the real fiber route and test its loss before relying on the rated distance.

For spans inside a building, a shorter-rated module is usually the cheaper match, and it does the same job. Choose the 10 km class when you need the reach or want margin on older fiber.

The OSFP-400G-LR4 is offered new and refurbished, each with a choice of 1 year or 3 years of warranty. No used offer is listed. Send your quantity and platform to request pricing.