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Arista

Arista CAB-Q-2Q-100G-2M | 100G to 2x 50G QSFP Breakout DAC Twinax Cable, 2M

Arista CAB-Q-2Q-100G-2M | 100G to 2x 50G QSFP Breakout DAC Twinax Cable, 2M

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

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Description

The Arista CAB-Q-2Q-100G-2M is a 2-metre passive Direct Attach Copper (DAC) breakout cable that splits a single 100GBASE-CR4 QSFP port into two independent 50GBASE-CR2 QSFP connections. Designed for high-density data centre and HPC environments, it delivers a cost-effective, low-power alternative to optical transceivers with zero active components and minimal latency overhead. Full native integration with Arista EOS (minimum version 4.22.1) and CloudVision ensures plug-and-play deployment without third-party qualification cycles.

As part of Arista's broad 1G–800G copper connectivity portfolio, this cable is hot-swappable and compliant with IEEE 802.3 open standards, making it compatible across Arista's data centre switching platforms. Backed by Arista TAC support and a 1-Year Limited Hardware Warranty, with optional Next Business Day and 4-Hour Advance Hardware Replacement available. Order direct from iptrading.com.au — Australian-owned and operated since 2001.

Features

- Passive copper construction — no active components, ultra-low power consumption
- Breakout capability: splits one 100G QSFP port into two independent 50G QSFP connections
- Compliant with IEEE 802.3 open standards (100GBASE-CR4 / 50GBASE-CR2)
- Hot-swappable for maximum uptime and simplified field servicing
- Fully integrated with Arista EOS and CloudVision — plug-and-play deployment
- Backed by Arista TAC support, eliminating third-party qualification cycles
- Ideal for high-density data centre and HPC cabling environments
- Part of a broad Arista portfolio spanning 1G to 800G copper connectivity

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-2M
- Cable Type: Passive Twinax Copper Direct Attach Cable (DAC)
- Speed: 100GBASE-CR4 (End A) to 2 x 50GBASE-CR2 (End B) — breakout
- Connector End A: 1 x QSFP (100G CR4 — 4 x 25G NRZ lanes)
- Connector End B: 2 x QSFP (50G CR2 — 2 x 25G NRZ lanes each)
- Cable Length: 2 metres
- Available Lengths in Series: 1M, 2M, 3M, 5M
- Minimum EOS Version: 4.22.1
- Interface Standard: 100GBASE-CR4 / 50GBASE-CR2 (IEEE 802.3)
- Active Components: None (passive construction)

FAQs

Q: What does the CAB-Q-2Q-100G-2M do exactly?
A: It is a passive breakout DAC cable that connects a single 100GBASE-CR4 QSFP port on one device to two separate 50GBASE-CR2 QSFP ports on two other devices, effectively splitting one 100G link into two independent 50G links. This is ideal for high-density top-of-rack cabling in data centres.

Q: Is this cable compatible with Arista switches out of the box?
A: Yes. The CAB-Q-2Q-100G-2M is natively supported under Arista EOS version 4.22.1 and later, and integrates with Arista CloudVision for plug-and-play operation with no additional qualification or third-party certification required.

Q: Does this cable require any power or transceivers?
A: No. It is a fully passive copper Twinax cable with no active components. No separate transceivers or power supply is needed — simply plug it directly into compatible QSFP ports on both ends.

Q: What other lengths are available in this cable series?
A: The 100G to 2x 50G QSFP breakout DAC series is available in 1M, 2M, 3M, and 5M lengths. Contact iptrading.com.au to check stock and pricing on alternate lengths.

Q: Can I purchase this cable in Australia, and is support available?
A: Yes. The Arista CAB-Q-2Q-100G-2M is available to order directly from iptrading.com.au, an Australian-owned B2B IT hardware reseller operating since 2001. The cable is backed by Arista's 1-Year Limited Hardware Warranty with optional Next Business Day or 4-Hour Advance Hardware Replacement support services.

Q: Is this cable hot-swappable?
A: Yes. Like all Arista DAC cables, the CAB-Q-2Q-100G-2M is hot-swappable, allowing you to install or replace it without powering down your switch or disrupting other ports — maximising uptime during maintenance or infrastructure changes.

Datasheet

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