• Silver-colored sfp+ transceiver modules with blue handles and metallic connectors for arista 400g osfp to 8x 50g sfp cable
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Arista

Arista CAB-O-8S-400G-2M | 400G OSFP to 8x 50G SFP DAC Breakout Cable, 2m

Arista CAB-O-8S-400G-2M | 400G OSFP to 8x 50G SFP DAC Breakout Cable, 2m

CAB-O-8S-400G-2M

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Description

The Arista CAB-O-8S-400G-2M is a 400GBASE-CR8 passive Direct Attach Copper (DAC) breakout cable that fans out a single OSFP 400G port into eight independent 50GBASE-CR SFP connections across a 2-metre twinax copper assembly. Engineered for high-density data centre and HPC environments, it delivers the full 400 Gbps aggregate bandwidth across 8 x 50G PAM-4 electrical lanes — all without active components, keeping power consumption and latency to a minimum.

Fully integrated with Arista EOS (minimum version 4.23.0) and CloudVision for plug-and-play deployment, this cable eliminates optics qualification cycles and is backed entirely by Arista support. Compatible with OSFP-equipped Arista switch platforms, it is ideal for server-to-switch and leaf-spine interconnects within short rack distances. Also available in 1 m and 3 m variants. Visit iptrading.com.au to secure your order — enterprise-grade hardware with expert support.

Features

- Passive DAC design — no active components, ultra-low power consumption and latency
- Breakout functionality fans one 400G OSFP port into eight independent 50G SFP ports
- 8 x 50G PAM-4 electrical lanes deliver full 400 Gbps aggregate bandwidth
- Compliant with IEEE 802.3cd 50GBASE-CR standard
- Fully integrated with Arista EOS and CloudVision for plug-and-play operation
- Eliminates optics qualification cycles — fully backed by Arista TAC support
- Ideal for high-density data centre, HPC, and server-to-switch short-reach interconnects
- Available in 1 m, 2 m, and 3 m variants (CAB-O-8S-400G-1M / 2M / 3M)

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-O-8S-400G-2M
- Speed: 400GBASE-CR8
- Connector End 1: OSFP (Octal Small Form-factor Pluggable)
- Connector End 2: 8 x SFP (50GBASE-CR)
- Cable Type: Passive Twinax Copper
- Cable Length: 2 metre
- Total Bandwidth: 400 Gbps
- Lane Configuration: 8 x 50G PAM-4 electrical lanes
- Breakout Ratio: 1 x 400G OSFP to 8 x 50G SFP
- Standard Compliance: IEEE 802.3cd 50GBASE-CR
- Minimum EOS Version: 4.23.0

FAQs

Q: What does the CAB-O-8S-400G-2M connect?
A: This cable connects a single OSFP 400G port on an Arista switch to eight separate 50GBASE-CR SFP ports, providing a 1-to-8 breakout over a 2-metre passive twinax copper assembly.

Q: Is this an active or passive cable?
A: It is a fully passive Direct Attach Copper (DAC) cable. There are no active components, which means lower power draw, reduced heat, and no firmware or driver requirements beyond standard Arista EOS support.

Q: Which Arista EOS version is required?
A: Arista EOS version 4.23.0 or later is required for full compatibility and plug-and-play operation with CloudVision management.

Q: Which Arista switch platforms support this cable?
A: The CAB-O-8S-400G-2M requires an Arista switch platform equipped with OSFP ports. Arista's 400G OSFP-capable platforms include the 7050CX3, 7060CX2, 7300X3 series, and similar high-density spine/leaf switches. Confirm your platform's OSFP port availability before ordering.

Q: What other length options are available?
A: The same breakout configuration is available in 1-metre (CAB-O-8S-400G-1M) and 3-metre (CAB-O-8S-400G-3M) variants, allowing flexibility across different rack and row layouts.

Q: Can I purchase the CAB-O-8S-400G-2M in Australia through IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware reseller stocking Arista cables and optics. Our team can assist with compatibility checks, bulk orders, and lead-time enquiries — visit iptrading.com.au or contact us directly for a quote.

Datasheet

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