Arista Network Optics & Cables – 1G to 400G - Refurbished, Used, New

Arista optics and cables by speed

Which Arista optic or cable do I need?

Start with the port: SFP+ ports take 10G modules and DACs, SFP28 ports take 25G (and usually 10G), QSFP+ ports take 40G, QSFP28 ports take 100G (and usually 40G), and QSFP-DD or OSFP ports take 400G. Then match the distance and the fiber you have. Inside a rack, a passive DAC is the cheapest link at up to about 5m for 25G and 100G, and 7m at 10G and 40G. Between rows, an AOC covers up to 20m with no separate optics or patch cords. Beyond that, use SR optics on multimode fiber (300m at 10G on OM3, 100m at 25G and 100G on OM4) and LR, LRL, FR4 or DR4 optics on single-mode. Parallel optics such as SR4, PSM4, PLR4 and DR4 need MPO connectors and the matching trunk cable; LR4, CWDM4, FR4 and UNIV use a duplex LC patch cord. If you are unsure of the fiber type or connector on an existing run, send us a photo of the patch panel and we will match it.

Frequently asked questions

What is the difference between an SR and an SRL or LRL optic?
The L stands for lite. Arista lite optics use the same wavelength, connector and fiber as the full-reach version but are rated for shorter distances: SFP-10G-SRL to 100m on OM3 instead of 300m, and SFP-10G-LRL or QSFP-40G-LRL4 to 1km on single-mode instead of 10km. They cost less and suit links inside one building. A full-reach SR or LR optic will always link to a lite optic at the shorter distance.

Can I use a QSFP-40G-UNIV on either fiber type?
Yes. The UNIV module is a 1310nm duplex LC optic that runs on multimode fiber to 150m and on single-mode fiber to 500m, so one spare part covers both. It must be paired with another UNIV at the far end.

Are Arista 100G QSFP28 ports backward compatible with 40G QSFP+ optics?
On most Arista QSFP28 ports, yes: the port can be configured to 40G and will accept a QSFP+ optic or QSFP+ DAC. Tell us the switch model when you order and we will confirm which 40G optics it supports.

NetworkTigers has sold enterprise network equipment since 1996. Every transceiver and cable carries the NetworkTigers 365-day warranty. Need a part or length not listed, or a quantity for a new fabric? Ask us for a quote.