• Silver-colored sfp+ transceiver modules with blue plastic handles and metallic connectors on arista 200g qsfp-dd breakout cable
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Arista

Arista CAB-D-2Q-200G-2M | 200G QSFP-DD to 2x 100G QSFP DAC Breakout Cable, 2m

Arista CAB-D-2Q-200G-2M | 200G QSFP-DD to 2x 100G QSFP DAC Breakout Cable, 2m

CAB-D-2Q-200G-2M

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End of life
This item has been replaced by CAB-D-2Q-400G-2M.

Description

The Arista CAB-D-2Q-200G-2M is a passive 200G Direct Attach Copper (DAC) breakout cable designed to connect a single QSFP-DD 200G port to two 100GBASE-CR4 QSFP devices over 2 metres. Operating across 8 x 25G NRZ electrical lanes, it enables seamless migration from legacy 100G QSFP infrastructure to modern 200G QSFP-DD switching fabrics — making it ideal for data centre environments where Arista QSFP-DD switches need to interconnect with existing 100G servers, NICs, or top-of-rack equipment without costly upgrades.

As a fully passive copper cable with no active components, the CAB-D-2Q-200G-2M delivers low power consumption and reliable short-reach connectivity. It is EEPROM-programmed for compatibility with legacy NIC software that recognises 25G NRZ DAC rates, and is fully certified across Arista platforms running EOS 4.23.0 or later. Hot-swappable and MSA-compliant, it integrates natively with Arista EOS for plug-and-play deployment. Get it now at iptrading.com.au — authentic hardware, reliable service.

Features

- Passive copper breakout design — no active components, minimal power draw
- Splits one 200G QSFP-DD port into two 100GBASE-CR4 QSFP connections
- EEPROM programmed for 25G NRZ compatibility with legacy NICs and equipment
- Full integration with Arista EOS software from version 4.23.0 onwards
- Hot-swappable pluggable device for easy installation and replacement
- Compliant with industry MSA (Multi-Source Agreement) standards
- Enables cost-effective 100G infrastructure reuse during 200G migration
- Part of Arista's comprehensive copper and optical portfolio from 1G to 800G

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.

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- Part Number: CAB-D-2Q-200G-2M
- Form Factor: QSFP-DD (200G) to 2 x QSFP (100G) Breakout
- Cable Type: Passive Twinax Copper (DAC)
- Cable Length: 2 metre
- Aggregate Data Rate: 200GBASE-CR8
- Electrical Lanes: 8 x 25G NRZ
- Breakout Speed: 2 x 100GBASE-CR4 (4 x 25G NRZ per QSFP)
- Connector 1: QSFP-DD (200G)
- Connector 2: 2 x QSFP28 / 100G QSFP (CR4)
- Minimum EOS Version: 4.23.0
- Available Lengths: 1m, 2m, 2.5m (CAB-D-2Q-200G-xM series)
- Hot-swappable: Yes
- Active Components: None (passive)

FAQs

Q: What does the CAB-D-2Q-200G-2M actually do?
A: It splits a single 200G QSFP-DD port into two independent 100GBASE-CR4 QSFP connections, allowing a 200G-capable Arista switch to connect directly to two legacy 100G QSFP devices — such as servers or NICs — over a 2-metre copper cable, with no transceivers or media converters required.

Q: Which Arista switches and platforms is this cable certified for?
A: The CAB-D-2Q-200G-2M is certified on all Arista platforms with QSFP-DD ports running EOS 4.23.0 or later. Always verify your specific switch model's compatibility matrix or consult the Arista datasheet for confirmed platform support.

Q: Does this cable require any special configuration on the Arista switch?
A: Yes. The QSFP-DD port must be configured to operate in 200G mode using 8 x 25G NRZ electrical lanes before the breakout cable will function correctly. This is managed within Arista EOS — no additional hardware is required.

Q: Will this DAC cable work with legacy 100G NICs that only recognise 25G DAC rates?
A: Yes. The cable's EEPROM is programmed to indicate 25G NRZ data rates, ensuring compatibility with legacy NIC software and equipment that only recognises DACs programmed for 25 Gbps — making it a practical choice for mixed-generation environments.

Q: Is the CAB-D-2Q-200G-2M available in other lengths?
A: Yes. The same product family (CAB-D-2Q-200G-xM series) is available in 1m and 2.5m variants in addition to this 2m version. Contact IP Trading to confirm availability of alternative lengths.

Q: Can I purchase the Arista CAB-D-2Q-200G-2M in Australia from IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware reseller supplying authentic Arista cables and transceivers. We offer reliable sourcing, local support, and fast fulfilment for data centre and enterprise networking projects across Australia.

Datasheet

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