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CAB-D-4Q-400G-2.5

The Arista CAB-D-4Q-400G-2.5 is a 2.5-meter passive direct attach copper (DAC) breakout cable designed to connect a single 400G QSFP-DD port to four 100G QSFP28 ports. This high-speed interconnect solution is ideal for cost-effective, short-reach data center cabling between 400G switches and high-density server clusters.

SKU: CAB-D-4Q-400G-2.5 Brand: Product ID: 377610
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Description

Arista CAB-D-4Q-400G-2.5 Overview

The CAB-D-4Q-400G-2.5 is a high-performance direct attach copper breakout cable designed to facilitate seamless 400G connectivity within dense data center environments. By utilizing the CAB-D-4Q-400G-2.5 architecture, network administrators can efficiently split a single high-bandwidth port into four distinct 100G lanes. This robust cabling solution is engineered for durability and reliable signal integrity, making it an ideal choice for those sourcing secondary market hardware. It provides a cost-effective pathway for scaling infrastructure without sacrificing the low-latency performance required by modern enterprise networking.

Arista CAB-D-4Q-400G-2.5 Technical Details

Featuring a 2.5-meter length, the CAB-D-4Q-400G-2.5 offers the perfect balance of reach and signal stability for top-of-rack server deployments. The assembly includes precision-engineered connectors that ensure a secure physical interface between Arista switches and compatible high-speed optics or transceivers. Its heavy-duty shielding minimizes electromagnetic interference, ensuring consistent throughput across all four breakout channels. This hardware component is a staple for engineers seeking to maximize port density while maintaining the rigorous standards expected of Arista networking equipment.

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ROC Telecom is a family-owned, Texas-based company specializing in helping businesses unlock value from their networking and telecom equipment. From routers and switches to optical gear and more, we provide a seamless solution for businesses looking to sell, recover assets responsibly, or buy quality-tested equipment at competitive prices.
 
What We Do
 
We make it easy to:
  • Sell Used Equipment: Get a quick, hassle-free quote and maximize the value of your old IT gear.
  • Buy Certified Networking Equipment: Access affordable, quality-tested equipment from top brands like Cisco, Juniper, Ciena, Fujitsu, Infinera and more.
Why Choose ROC Telecom?
  • Expertise You Can Trust: 15 years of experience in asset recovery and resale.
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  • Competitive Pricing: Fair, fast, and accurate valuations for all your equipment.
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Our Process
  1. Submit a Request: You can use the “Buy” or “Sell” buttons above to get started — or fill out a form, call us at 585-406-1248, or email bailey@roctelecom.com. Whatever’s easiest for you, we’ll make it quick and hassle-free.
  2. Quick Evaluation: We’ll assess your equipment—whether you’re looking to sell it or find the right gear for your needs—and provide a fair offer.
  3. Simple Logistics: Fast, secure, and straightforward shipping or pickup solutions.
  4. Value Delivered: Recover funds from unused equipment or save on quality-tested networking and telecom gear.
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