• Silver-colored sfp+ transceiver modules with blue plastic handles and metallic connectors in arista 100g qsfp breakout cable
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Arista

Arista CAB-Q-2Q-100G-5M | 100G QSFP to 2x50G QSFP Twinax DAC Breakout Cable, 5M

Arista CAB-Q-2Q-100G-5M | 100G QSFP to 2x50G QSFP Twinax DAC Breakout Cable, 5M

CAB-Q-2Q-100G-5M

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Description

The Arista CAB-Q-2Q-100G-5M is a 100GBASE-CR4 to 2x50GBASE-CR2 passive Twinax DAC breakout cable designed for high-density data centre interconnects. This 5-metre cable splits a single 100G QSFP28 port into two independent 50G QSFP28 connections, making it ideal for top-of-rack and intra-rack deployments where port density and cost efficiency are priorities. The passive copper construction eliminates active components, delivering ultra-low power consumption and reliable short-reach connectivity.

Compatible with most Arista EOS-based switches running software version 4.22.1 or later, this cable integrates seamlessly into Arista's broad high-density optics and cabling ecosystem. It conforms to the QSFP MSA open standard and supports hot-swap for maximum uptime. Available in 1M, 2M, 3M, and 5M lengths to suit varying rack configurations. In stock and ready to ship from iptrading.com.au — order now for fast dispatch.

Features

- 100G to 2x50G breakout — splits one 100G QSFP28 port into two independent 50G QSFP28 connections
- Passive Twinax copper construction — zero active components, ultra-low power consumption
- Hot-swappable QSFP28 form factor for maximum uptime and easy field servicing
- Compliant with QSFP MSA open standards for broad interoperability
- 5-metre length suits intra-rack and top-of-rack data centre cabling environments
- Part of Arista's extensive 1G to 400GE optics and cable portfolio
- Cost-effective alternative to optical transceivers for short-reach 50G/100G interconnects

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-2Q-100G-5M
- Cable Type: 100GBASE-CR4 QSFP to 2x50GBASE-CR2 QSFP Passive Twinax DAC Breakout Cable
- Cable Length: 5 Metres
- Connector Side A: 1x QSFP28 (100G, 4-lane)
- Connector Side B: 2x QSFP28 (50G each, 2-lane per connector)
- Aggregate Data Rate: 100G (2x 50GBASE-CR2)
- Cable Construction: Passive Twinax Copper
- Form Factor: Hot-swappable QSFP28
- Minimum EOS Software Version: 4.22.1
- Available Series Lengths: 1M, 2M, 3M, 5M
- Warranty: 1 Year Limited Hardware Warranty

FAQs

Q: What does this cable actually do — how does the breakout work?
A: The CAB-Q-2Q-100G-5M takes a single 100G QSFP28 port (4 lanes x 25G) and splits it into two separate 50G QSFP28 connections (2 lanes x 25G each). This lets you connect one 100G switch port to two different 50G devices, doubling your effective port count for 50G endpoints without any additional hardware.

Q: Which Arista switches is this cable compatible with?
A: This cable is supported on most Arista EOS-based switches. Arista recommends running EOS version 4.22.1 or later. For a full list of compatible platforms, consult the Arista Transceiver and Cable Guide on the Arista website or contact IP Trading for assistance.

Q: Is this cable compatible with non-Arista switches?
A: The cable conforms to the QSFP MSA open standard, so it may be physically compatible with some third-party switches. However, Arista cables are optimised and validated for Arista platforms. Compatibility with non-Arista equipment is not guaranteed and should be verified before deployment.

Q: What is the difference between a passive DAC cable and an active optical cable (AOC)?
A: A passive DAC cable like this one uses direct copper conductors with no active electronics, resulting in lower latency, lower power consumption, and lower cost. It is ideal for short-reach intra-rack or top-of-rack connections up to 5 metres. AOCs use fibre and active transceivers, supporting longer distances but at higher cost and power draw.

Q: Can I purchase this cable in Australia through IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware reseller with this cable in stock and ready to ship. Orders placed promptly benefit from fast local dispatch, and the IP Trading team can assist with bulk orders or multi-length configurations.

Q: What warranty is included with the CAB-Q-2Q-100G-5M?
A: Arista provides a 1-year limited hardware warranty covering parts, repair, or replacement with a 10 business day turnaround after receipt of the faulty unit. Optional next business day and 4-hour advance hardware replacement programmes are also available for environments requiring faster support.

Datasheet

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