• Silver-colored arista 100g qsfp28 dac cable passive twinax sfp plus transceiver modules with blue plastic handles
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Arista

Arista CAB-Q-Q-100G-2M | 100G QSFP28 DAC Cable, Passive Twinax, 2 Metre

Arista CAB-Q-Q-100G-2M | 100G QSFP28 DAC Cable, Passive Twinax, 2 Metre

CAB-Q-Q-100G-2M

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Description

The Arista CAB-Q-Q-100G-2M is a 100GBASE-CR4 passive QSFP28 to QSFP28 Direct Attach Copper (DAC) twinax cable delivering 100 Gbps over 2 metres. Designed for cost-effective, short-reach data centre interconnections, it aggregates four independent 25G full-duplex channels to achieve 100G throughput with minimal power draw — just 1.5W per end. Its passive copper design eliminates active components entirely, making it an ideal choice for top-of-rack and rack-to-rack switch interconnects in high-density data centre and HPC environments.

Compliant with IEEE 802.3bj, SFF-8665, and SFF-8679 MSA standards, this cable integrates seamlessly with Arista 100G QSFP28 switch ports and is hot-swappable for simplified deployment. RoHS compliant and part of Arista's broad optics portfolio spanning 1G to 400GE, the CAB-Q-Q-100G-2M offers a proven, standards-based solution for high-speed fabric connectivity. Need it fast? iptrading.com.au delivers across Australia — shop now.

Features

- Passive copper design — no active components, ultra-low 1.5W power consumption per end
- Four independent full-duplex 25G channels aggregated to deliver 100G throughput
- Hot-swappable QSFP28 connectors at both ends for simplified installation and maintenance
- Compliant with IEEE 802.3bj, SFF-8665, and SFF-8679 MSA standards for broad interoperability
- Optimised for top-of-rack and rack-to-rack switch interconnects in data centre environments
- Supports 100G Ethernet (103.125 Gbps) applications including HPC and high-density fabric
- Part of Arista's comprehensive optics portfolio covering DACs, AOCs, and fibre from 1G to 400GE
- RoHS compliant for environmentally responsible deployment

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-Q-Q-100G-2M
- Cable Type: Passive Twinax Copper (DAC)
- Connector Type: QSFP28 to QSFP28
- Data Rate: 100GBASE-CR4 (103.125 Gbps line speed)
- Channels: 4 independent full-duplex channels at up to 25.8 Gbps per channel
- Cable Length: 2 metres (6.6 ft)
- Supply Voltage: 3.3V
- Max Power Consumption: 1.5W per end
- Compliance: IEEE 802.3bj, SFF-8665, SFF-8679
- Operating Temperature: 0°C to +70°C (commercial grade)
- RoHS Compliant: Yes

FAQs

Q: What is the maximum supported cable length for the CAB-Q-Q-100G-2M?
A: This cable is a fixed 2-metre passive DAC. Passive QSFP28 twinax cables are typically suitable for distances up to around 5 metres; for longer runs, active DAC or fibre-based solutions should be considered.

Q: Is the CAB-Q-Q-100G-2M compatible with non-Arista switches?
A: The cable is built to IEEE 802.3bj, SFF-8665, and SFF-8679 MSA standards, which are widely supported across the industry. However, Arista certifies it specifically for use with Arista QSFP28-capable switches. Compatibility with third-party platforms should be verified before deployment.

Q: Does this cable require any configuration or drivers?
A: No. As a passive DAC, the CAB-Q-Q-100G-2M requires no active components, drivers, or firmware. It is plug-and-play and hot-swappable into any compatible QSFP28 port.

Q: What is the power consumption of this cable?
A: The cable consumes a maximum of 1.5W per end at 3.3V supply voltage. Its passive design makes it one of the most energy-efficient options for short-reach 100G interconnects.

Q: What warranty applies to this Arista DAC cable?
A: Arista provides a 1-Year Limited Hardware Warranty covering parts, repair, or replacement within 10 business days of receipt. Optional Next Business Day and 4-Hour Advance Hardware Replacement support programmes are also available.

Q: Can I purchase the Arista CAB-Q-Q-100G-2M in Australia from IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware reseller stocking Arista networking products including DAC cables. We deliver across Australia — contact us or order online for competitive pricing and fast dispatch.

Datasheet

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