• Silver-colored Arista QDD-800G-2LR4 SFP+ transceiver modules with blue handles and metallic connectors for 800G QSFP-DD use
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Arista

Arista QDD-800G-2LR4 | 800G QSFP-DD Transceiver, 2x 400G-LR4, 10km, LC

QDD-800G-2LR4

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Description

This Arista 800G QSFP-DD transceiver carries two independent 400GBASE-LR4 links (800GBASE-2LR4) over dual duplex LC single-mode fibre, reaching up to 10km. It suits data centre spine and leaf links, campus-to-campus runs on duplex single-mode fibre, and high-density 400G and 100G aggregation from an 800G switch port.

The module uses the QSFP-DD form factor with two duplex LC connectors and operates on CWDM wavelengths of 1271, 1291, 1311 and 1331 nm across G.652 single-mode fibre. It is dual-rate capable, so it can run at half speed as 2x 200G-LR4 links. It interoperates with 2x 400G-LR4 OSFP or QSFP-DD optics and with 200G-LR4 QSFP modules, and supports breakout to 2x 400G or 8x 100G aggregation.

It fits QSFP-DD ports only, as OSFP and QSFP-DD are physically different and not interchangeable. A minimum EOS version of 4.29.2 is required, and the module has a pull-tab release.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- Dual 400G (800G aggregate) in a single QSFP-DD module
- Dual-rate capable, running each electrical lane at 50G PAM4 for 2x 200G-LR4 links
- Interoperates with existing 400G-LR4 and 200G-LR4 optics
- Supports high-density 400GE and 100GE connectivity
- Hot-swappable and standards-compliant
- Duplex LC connectors for standard duplex single-mode fibre plant
- Pull-tab release

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- PHY type: 800GBASE-2LR4 (2x 400GBASE-LR4)
- Form factor: QSFP-DD
- Connector: 2x Duplex LC
- Fibre type: SMF (G.652)
- Maximum reach: 10km over dual duplex SMF
- Wavelengths: 1271, 1291, 1311, 1331 nm
- Dual-rate operation: 2x 400GBASE-LR4 or 2x 200GBASE-LR4 (half-speed capable)
- Interoperability: 2x 400G-LR4 OSFP or QSFP-DD, or 2x 200G-LR4 QSFP modules
- Supported breakout modes: 2x 400G, 8x 100G aggregation
- Latch type: Pull tab
- Minimum EOS version: 4.29.2
- QSFP-DD Type 1 module dimensions: 13.5 x 18.4 x 78.3 mm

FAQs

Q: Which host ports does this module fit?
A: It fits QSFP-DD ports only. OSFP and QSFP-DD are physically different form factors and are not interchangeable.

Q: What software version is required?
A: A minimum EOS version of 4.29.2 is required on the host switch.

Q: What can it link to at the far end?
A: It interoperates with 2x 400G-LR4 OSFP or QSFP-DD optics, such as OSFP-800G-2LR4, or with 2x 200G-LR4 QSFP modules.

Q: Can it run at a lower speed?
A: Yes. It is dual-rate capable and can operate at half speed to provide 2x 200G-LR4 links.

Q: What fibre and distance does it support?
A: It runs over G.652 single-mode fibre using dual duplex LC connectors, with a maximum reach of 10km.

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