The Arista QDD-400G-ZR is a QSFP-DD 400ZR coherent, tunable (OpenZR+) module from Arista Networks for 400 Gbps links. It plugs into a QSFP-DD port on an Arista switch and is used for 400G spine and super-spine fabrics, AI/ML clusters, 4 × 100G breakout and data-centre interconnect.

Arista specifies the QDD-400G-ZR for Up to 120 km over duplex single-mode fiber with optical amplification (DWDM line system).

Per Arista's published optics data sheet, the QDD-400G-ZR transmits −10 dBm class and receives −16 to 0 dBm.

The QDD-400G-ZR uses a Duplex LC connector on duplex single-mode (G.652), at 1528.77–1566.52 nm (C-band tunable). Both ends of the link must use the same optical standard.

It works in Arista switches with QSFP-DD ports that support this optic. Arista lists it as supported on specific platforms only. Send us your switch model and EOS version and we will check it against Arista's Transceiver and Cable Guide before dispatch, so you only receive a module that works in your port.

QDD-400G-ZR is 400ZR with OpenZR+ support (−10 dBm class); QDD-400G-ZR-EE is the energy-efficient 400ZR version; QDD-400G-ZRP is the high-power ZR+ optic (> 0 dBm output) for longer amplified routes. OSFP-400G-ZR is the OSFP form factor version. All need a supported platform and line system.

Yes. Next Gen Networks supplies original Arista Networks optics, not third-party lookalikes or grey-market stock. Every unit is checked before dispatch, and we share the serial numbers on request so you can verify them in EOS ('show inventory').

The Arista QDD-400G-ZR price in India depends on quantity, delivery city and current stock. Next Gen Networks supplies it with a GST invoice (input tax credit ready) and pan-India dispatch from New Delhi. Send the part number, quantity and delivery city on WhatsApp +91-7827955775 or email Sales@nextgennetworks.in and we reply with a GST quote.