• Silver-colored arista cab-d-2q-400-2.5 sfp+ transceiver modules with blue plastic handles and metallic connectors in a 400g qsfp-dd breakout cable
1 1

Arista

Arista CAB-D-2Q-400-2.5 | 400G QSFP-DD to 2x 200G QSFP DAC Breakout Cable, 2.5m

Arista CAB-D-2Q-400-2.5 | 400G QSFP-DD to 2x 200G QSFP DAC Breakout Cable, 2.5m

CAB-D-2Q-400-2.5

Stock Status: Enquire

$0.00 AUD
$0.00 AUD
$0.00 AUD
Sale Stock Status: Enquire
Taxes included. Shipping calculated at checkout.

Description

The Arista CAB-D-2Q-400-2.5 is a passive 400GBASE-CR8 to 2x 200GBASE-CR4 Direct Attach Copper (DAC) breakout cable designed for high-density data centre and HPC interconnects. It splits a single 400G QSFP-DD port into two independent 200G QSFP56 connections over 2.5 metres of twinax copper, supporting PAM4 signalling at 2x 200 Gbps — ideal for top-of-rack and adjacent-rack deployments where low latency and minimal power draw are priorities.

Compliant with the QSFP-DD MSA and IEEE 802.3cd standards, this passive copper cable integrates seamlessly with Arista EOS and CloudVision for plug-and-play operation with no optics qualification cycles required. It also supports 2x 100G NRZ fanout applications, adding deployment flexibility. Hot-swappable and built to 28 AWG, it delivers a cost-effective short-reach solution backed by Arista's hardware warranty. Order today from iptrading.com.au — your local source for enterprise-grade networking solutions.

Features

- Breaks out a single 400G QSFP-DD port into two independent 200G QSFP56 ports for flexible density
- Passive copper design — no active components means low power consumption and high reliability
- Supports both 2x 200G PAM4 and 2x 100G NRZ fanout applications for deployment versatility
- Cost-effective short-reach connectivity between adjacent racks in data centre and HPC environments
- Hot-swappable for maximum uptime and simplified servicing without downtime
- Full plug-and-play integration with Arista EOS and CloudVision — no optics qualification cycles
- Compliant with QSFP-DD MSA and IEEE 802.3cd open standards for broad interoperability
- Backed by Arista's hardware support with optional Next Business Day and 4-Hour Advance Replacement

Warranty

Arista hardware products come with a 1-year limited hardware warranty, covering defects in materials and workmanship under normal use.
Extended Warranty Options:
IP Trading offers tailored extended warranty solutions and support packages for Arista products. Contact our team to explore options that align with your organisation's needs.
https://www.arista.com/assets/data/pdf/Warranty.pdf

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

View full details

specs-tabs

Technical Specifications

FAQs

Datasheet

Technical Specifications

- Form Factor: QSFP-DD (400G) to 2 x QSFP56 (200G) breakout
- Data Rate: 400GBASE-CR8 (single end) / 2 x 200GBASE-CR4 (two ends)
- Cable Type: Passive Twinax Copper Direct Attach Cable (DAC)
- Cable Length: 2.5 metres (8.2 ft)
- Electrical Interface: 2 x 200 Gbps PAM4 signals
- Also supports: 2 x 100 Gbps NRZ fanout application
- Connector: MSA-compliant 76-pin edge type connectors
- Wire Gauge: 28 AWG
- Standards: QSFP-DD MSA, IEEE 802.3cd 200GBASE-CR4, 200GAUI-4
- Memory Map: Accessible via 2-wire Interface (TWI / I2C)
- Hot-Swappable: Yes
- Warranty: 1 Year Limited Hardware Warranty

FAQs

Q: What does the CAB-D-2Q-400-2.5 connect, and how does the breakout work?
A: This cable connects a single 400G QSFP-DD port on one end to two separate 200G QSFP56 ports on the other. It physically splits the 8-lane 400G signal into two independent 4-lane 200G channels, enabling a 2:1 port density expansion between switches or servers in the same or adjacent racks.

Q: Is this cable compatible with non-Arista switches?
A: The cable is compliant with the QSFP-DD MSA and IEEE 802.3cd standards, which means it is designed to work with any standards-compliant QSFP-DD and QSFP56 equipment. However, full plug-and-play recognition and support is guaranteed on Arista platforms running EOS. Compatibility with third-party vendors should be verified against their transceiver support lists.

Q: Does this cable support 100G connections as well as 200G?
A: Yes. In addition to the primary 2x 200GBASE-CR4 PAM4 application, the cable also supports a 2x 100G NRZ fanout mode, providing additional flexibility for mixed-speed environments.

Q: What is the maximum reach of this DAC cable?
A: This is a passive twinax copper Direct Attach Cable rated for a reach of 2.5 metres (approximately 8.2 feet), making it suited for top-of-rack and adjacent-rack connections within the same data centre row.

Q: Can I purchase this cable in Australia through IP Trading?
A: Yes. The Arista CAB-D-2Q-400-2.5 is available through iptrading.com.au, an Australian B2B IT hardware reseller specialising in enterprise networking. Contact the team for pricing, availability, and volume enquiries.

Q: What warranty does the Arista CAB-D-2Q-400-2.5 carry?
A: Arista provides a 1-Year Limited Hardware Warranty covering parts, repair, or replacement with a 10 business day turnaround. Optional upgrade programmes including Next Business Day and 4-Hour Advance Hardware Replacement are available for environments requiring faster response times.

Datasheet

This product has a detailed PDF datasheet available. Open PDF datasheet in a new tab .

Your browser can’t display the embedded PDF. Click here to open it in a new tab.

Recently Viewed

  • Request for a Quote

    Looking for competitive pricing? Submit a request, and our team will provide a tailored quote that fits your needs.

  • Contact Us Directly

    Have a question or need immediate assistance? Call us for expert advice and real-time support.

    Call us Now  

  • Contact Us Directly

    Have a question or need immediate assistance? Call us for expert advice and real-time support.

    Contact us