Arista QDD-400G-SR8 400GB BASE-SR8 100m Parallel OM4 MMF QSFP-DD Transceiver

The Arista QDD-400G-SR8 is a QSFP-DD 400GBASE-SR8 optical transceiver for 400G links over parallel multimode fiber. It transmits at 850nm. It reaches up to 70 meters on OM3 and 100 meters on OM4 and uses an MPO-16 APC connector.

Arista lists breakout to lower speeds only for the separate -C version of this optic. Use a matching 400GBASE-SR8 optic at the far end of the link unless Arista lists the pairing above, and use multimode patch cables of the grade your reach requires.

If you need a different reach, the QDD-400G-DR4 400GBASE-DR4 transceiver and the QDD-400G-XDR4 400G-XDR4 (4x 100GBASE-FR) transceiver are 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.

OM3 and OM4 multimode patch cables are normally aqua, and some OM4 cables are violet. Check that every patch cord and panel in the path matches the fiber grade your reach requires.

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.

This seller refurbished QDD-400G-SR8 is tested, working, and covered by the NetworkTigers one-year warranty.