• Silver-colored Arista QDD-800G-2XDR4 QSFP-DD transceiver modules with blue handles and metallic connectors for 800G use
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Arista

Arista QDD-800G-2XDR4 | 800G QSFP-DD Transceiver, 2x 400G XDR4, 2km, MPO-12

QDD-800G-2XDR4

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Description

This 800G QSFP-DD transceiver from Arista's 800G optics range carries two 400GBASE-XDR4 links over parallel single-mode fibre at 1310nm, reaching up to 2km. It is aimed at 800G data centre leaf-spine links and AI and HPC fabrics where high-density 800G ports need to connect to 2x 400G or 8x 100G endpoints.

The module runs 8 lanes of 100G PAM4 through an 800GAUI-8 electrical interface and uses dual MPO-12 APC connectors for the parallel single-mode fibre. It operates from a 3.3V supply and supports digital diagnostics monitoring. The host must provide KP4-FEC.

It interoperates with 2x 400G-XDR4 OSFP and QSFP-DD optics, so no breakout cable is needed for that connection, and it can also break out to 8x 100G-FR QSFP optics. The OSFP version of this optic is OSFP-800G-2XDR4. Use it in Arista platforms with QSFP-DD 800G ports that support KP4-FEC.

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

Features

- Carries two 400GBASE-XDR4 links over parallel single-mode fibre
- Interoperates with 2x 400G-XDR4 OSFP and QSFP-DD optics
- No breakout cable needed when connecting to 2x 400G-XDR4
- Breakout to 8x 100G-FR QSFP links
- 8x 100G PAM4 electrical lanes for dense 800G ports
- Digital diagnostics monitoring

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

- Form factor: QSFP-DD
- Data rate: 800G (2x 400GBASE-XDR4)
- Electrical lanes: 8 x 106.25 Gbps PAM4
- Wavelength: 1310nm
- Maximum reach: 2km
- Fibre type: Parallel single-mode (SMF)
- Connector: Dual MPO-12 APC
- Electrical interface: 800GAUI-8 (IEEE 802.3ck)
- Host FEC required: KP4-FEC
- Power supply: 3.3V
- Digital diagnostics (DDM): Supported
- Standards: IEEE 802.3ck, IEEE 802.3cu, QSFP-DD MSA, CMIS 5.0

FAQs

Q: What can this 800G optic connect to?
A: It interoperates with 2x 400G-XDR4 OSFP and QSFP-DD optics and can break out to 8x 100G-FR QSFP optics. No breakout cable is needed when connecting to 2x 400G-XDR4.

Q: Is there an OSFP version of this transceiver?
A: Yes. The OSFP form factor equivalent is OSFP-800G-2XDR4, which uses the same 2x 400G XDR4 optical interface.

Q: What host requirements does it have?
A: It needs a platform with QSFP-DD 800G ports and KP4-FEC support. Check the Arista Transceiver Guide for the minimum EOS version on your platform.

Q: What fibre and connectors does it use?
A: It uses parallel single-mode fibre with dual MPO-12 APC connectors, at 1310nm for up to 2km.

Q: Does it support digital diagnostics?
A: Yes. Digital diagnostics monitoring (DDM) is supported, with CMIS 5.0 management.

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