Arista QSFP-40G-LRL4 40GB BASE-LRL4 850nm SMF QSFP+ Transceiver

The Arista QSFP-40G-LRL4 is a QSFP+ 40GBASE-LRL4 optical transceiver for 40G links over duplex single-mode fiber. It reaches up to 1 kilometer and uses a duplex LC connector.

It interoperates with 40GBASE-LR4 optics up to 1 kilometer. Use a matching 40GBASE-LRL4 optic at the far end of the link unless Arista lists the pairing above, and use single-mode patch cables.

If you need a different reach, the QSFP-40G-XSR4 40GBASE-XSR4 transceiver and the QSFP-40G-SRBD 40GBASE-BIDI (SRBD) transceiver are also available. A new QSFP-40G-LRL4 is also available.

Arista publishes a transceiver compatibility guide that lists which switch platforms and EOS releases support each module, so check it for your switch before you order.

Single-mode fiber is normally run in yellow jacketed patch cables, so check that every patch cord and panel in the path is single-mode before you connect it.

Keep the dust caps on the optic and the fiber until you are ready to connect them, and clean the connector end faces before you plug them in. Most failed optical links come down to a dirty connector.

The module is hot-swappable, so you can install or replace it without powering down the switch. Check that the port is set to the right speed before you bring the link up.

This seller refurbished QSFP-40G-LRL4 is tested, working, and covered by the NetworkTigers one-year warranty.