Arista 100GBASE-ER QSFP Transceiver, 40 km Duplex Single-Mode

At 40 km, the Arista 100GBASE-ER QSFP Transceiver, part number QSFP-100G-ER, covers metro-scale distances at 100GbE. It uses a duplex LC connector over single-mode fiber and has a QSFP28 form factor with one port.

Links of this length typically join separate data centers or connect remote sites to a main facility without intermediate transport equipment. The stated reach assumes a clean fiber path. Splices, connectors and aging fiber all consume the optical budget, so have the route tested before you rely on the rating.

Extended-reach modules also have receiver limits. On a short span, the signal can be too strong for the receiver, and an attenuator may be needed. Check the manufacturer's documentation for attenuation guidance for your link length.

Host support varies by platform, so confirm that your Arista switch accepts the module, and use a matching module on the other end.

When you request pricing, include the route distance and the loss figures if you have them. That helps us confirm that this rating suits your link.

The QSFP-100G-ER is offered new, refurbished and used. New and refurbished modules carry 1 year or 3 years of warranty, and used modules carry 90 days. Send your quantity and platform.