Arista

Arista CAB-D-8S-200G-2.5 | 200G QSFP-DD to 8xSFP28 DAC | 200GBASE-CR8/25GBASE-CR | passive twinax | 2.5m

Arista CAB-D-8S-200G-2.5 | 200G QSFP-DD to 8xSFP28 DAC | 200GBASE-CR8/25GBASE-CR | passive twinax | 2.5m

SKU:CAB-D-8S-200G-2.5

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Description

High-density 200G direct-attach breakout cable designed for leaf–spine and server aggregation. Connect one QSFP‑DD 200G port to eight 25G SFP28 ports over low‑latency passive twinax. Ideal for short‑reach top‑of‑rack wiring with minimal power and heat.

Features

- High-density 1x200G to 8x25G breakout for efficient fan‑out
- Ultra‑low latency passive copper signal path
- Tool‑less, hot‑pluggable module ends
- Cost‑effective short‑reach alternative to optics
- Reduced power draw and thermal load versus active solutions

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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FAQs

Technical Specifications

FAQs

Q: Is this cable passive or active?
A: It is a passive twinax DAC; no active components or external power are required.

Q: Do I need 8x25G breakout support on the QSFP‑DD port?
A: Yes. The host QSFP‑DD port must support 8x25G breakout for proper operation.

Q: Can this connect to SFP+ (10G) ports?
A: No. The device ends are SFP28 and operate at 25G; 10G SFP+ ports are not supported.

Q: What is the maximum reach?
A: The reach is the cable length itself—2.5 meters.

Q: Where is this best used?
A: Top‑of‑rack and in‑rack connections where ultra‑low latency and low cost are preferred.

Technical Specifications

- Speed: 200 Gb/s aggregate (8 x 25G lanes)
- Form factors: QSFP-DD (host) to 8 x SFP28 (device)
- Standards: 200GBASE-CR8 and 25GBASE-CR breakout
- Cable type: Passive twinax copper (DAC)
- Length: 2.5 meters
- Breakout mapping: 1x QSFP‑DD 8‑lane to 8x single‑lane SFP28
- Power/latency: Passive, near‑zero latency, no external power
- Use case: Short‑reach TOR, server NIC fan‑out, switch breakouts
- Compatibility: Requires switch/NIC support for 8x25G breakout on QSFP‑DD port

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