• Silver-colored sfp+ transceiver modules with blue plastic handles and metallic connectors on arista cab-d-8s-200-2.5 breakout cable
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Arista

Arista CAB-D-8S-200-2.5 | 200G QSFP-DD to 8x 25G SFP DAC Breakout Cable, 2.5m

Arista CAB-D-8S-200-2.5 | 200G QSFP-DD to 8x 25G SFP DAC Breakout Cable, 2.5m

CAB-D-8S-200-2.5

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Description

The Arista CAB-D-8S-200-2.5 is a passive 200GBASE-CR8 QSFP-DD to 8 x 25GBASE-CR SFP Twinax Direct Attach Copper (DAC) breakout cable, delivering 200Gbps aggregate bandwidth across a 2.5-metre copper interconnect. Designed for data centre spine-leaf architectures and high-density server connectivity, this cable splits a single 200G QSFP-DD port into eight independent 25G SFP connections — enabling flexible, cost-effective short-reach cabling without the complexity or cost of optical transceivers. Compliant with QSFP-DD MSA, IEEE 802.3bs, and CMIS 4.0 standards, it is fully validated for use with Arista EOS 4.23.0 and later.

As a passive cable assembly, the CAB-D-8S-200-2.5 draws minimal power (~0.1W per end) and requires no active components, simplifying deployment and reducing operational overhead. Its EEPROM is programmed to signal 25G NRZ format for seamless compatibility with legacy NICs and SFP-based switches. Hot-swappable and pre-terminated for plug-and-play installation, this cable suits high-performance computing aggregation, ToR switch-to-server links, and dense leaf-spine fabrics. Buy today from iptrading.com.au — fast shipping and expert service across Australia.

Features

- Breakout connectivity: 1 x 200G QSFP-DD port to 8 x 25G SFP ports in a single cable assembly
- Passive design — no active components, ultra-low power consumption (~0.1W per end)
- Cost-effective copper alternative to optical transceiver solutions for short-reach data centre links
- EEPROM programmed for 25G NRZ signal format, ensuring compatibility with legacy NIC software
- Hot-swappable pluggable solution for simplified maintenance and rapid port changes
- Pre-terminated and plug-and-play — no field splicing or special tooling required
- Standards-compliant: QSFP-DD MSA, IEEE 802.3bs, CMIS 4.0, SFF-8472
- Ideal for spine-leaf fabrics, ToR switch-to-server links, and HPC aggregation layers

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

- Form Factor: QSFP-DD (one end) to 8 x SFP28 (breakout ends)
- Cable Type: Passive Twinax Copper Direct Attach Cable (DAC)
- Aggregate Data Rate: 200 Gbps (8 x 25 Gbps NRZ lanes)
- Cable Length: 2.5 metres
- Electrical Interface: 8 x 25 Gb/s NRZ
- Standards: QSFP-DD MSA, IEEE 802.3bs (200GAUI-8), IEEE 802.3by (25GAUI), CMIS 4.0, SFF-8472
- Minimum EOS Version: 4.23.0
- Power Consumption: ~0.1W per end (passive, no active components)
- Deployment: Hot-swappable, pre-terminated plug-and-play

FAQs

Q: What does the CAB-D-8S-200-2.5 breakout cable connect?
A: It connects one 200G QSFP-DD port to eight independent 25G SFP ports, allowing a single high-speed switch port to fan out to multiple servers or downstream devices at 25G per lane.

Q: Is this cable compatible with non-Arista switches or NICs?
A: The cable is designed and validated for use with Arista EOS-based platforms (minimum EOS 4.23.0). Its EEPROM is programmed to advertise 25G NRZ signalling, which aids compatibility with many legacy SFP-based NICs and switches, but Arista validation is the primary guarantee.

Q: Does this cable require any special power or cooling?
A: No. As a fully passive DAC cable, it draws approximately 0.1W per end and contains no active electronics. It requires no additional power supply, drivers, or cooling beyond what is already provided by the host switch or NIC.

Q: What is the maximum supported cable length?
A: This model is a 2.5-metre passive DAC cable. For longer reach or building inter-rack runs, active optical cable (AOC) or optical transceiver solutions should be considered.

Q: What use cases is this cable best suited for?
A: It is ideal for data centre spine-leaf architectures, top-of-rack (ToR) switch-to-server connectivity, and high-density aggregation environments where short-reach 200G-to-8x25G breakout is needed at low cost and low power.

Q: Can I buy this cable in Australia from IP Trading?
A: Yes. The Arista CAB-D-8S-200-2.5 is available from iptrading.com.au with fast Australia-wide shipping and expert pre-sales support to confirm compatibility with your Arista infrastructure.

Datasheet

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