Arista 40GBASE-LR4 QSFP+ Transceiver, 10 km Duplex Single-Mode

Forty gigabit Ethernet over duplex single-mode fiber is what the Arista 40GBASE-LR4 QSFP+ Transceiver, part number QSFP-40G-LR4, provides. The rated reach is 10 km, and it uses a duplex LC connector.

The duplex LC connector is the main practical advantage. Many 40GbE optics use parallel MPO fiber, which requires special trunks. This module runs over a regular fiber pair, so existing single-mode infrastructure can carry the link.

Ten kilometers suits campus backbones and short metro connections. Check the real fiber distance, and confirm both ends of the link use compatible modules. The form factor is QSFP+, which is the cage style for 40GbE ports, so the module fits QSFP+ ports and not SFP+ ports.

This is a good fit for networks still running 40GbE where optics must be replaced. For new builds, 100GbE modules are often chosen, but the existing 40GbE switch ports still need this type of module.

Check Arista's supported-optics information for your switch before ordering.

The QSFP-40G-LR4 is offered new and refurbished, each with a warranty choice of 1 year or 3 years. No used offer is listed. Send your quantity and platform with your request.