Cisco

Cisco NXA-QDD-2Q-CU1M | 400G>2x200G, QSFP-DD>2x QSFP56, DAC passive copper, 400GBASE-CR8/200GBASE-CR4, reach 1m, connectors QSFP-DD to 2x QSFP56

SKU:NXA-QDD-2Q-CU1M

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Description

400G QSFP-DD to dual 200G QSFP56 passive copper breakout DAC for short-reach, low-latency interconnects. Maps 8x50G PAM4 lanes to two 4x50G 200G links, enabling clean spine/leaf breakouts without optics. Ideal for top-of-rack deployments where power efficiency and simplicity are critical.

Features

- Breaks out one 400G QSFP-DD port to two 200G QSFP56 ports
- Ultra-low latency passive copper design
- No optics or power consumption
- Standards-based CR8/CR4 lane mapping for 50G PAM4 signaling
- Hot-pluggable, tool-less installation
- Optimized for short-reach in-rack deployments

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: Does this cable require transceivers?
A: No. It is a passive DAC and plugs directly into QSFP-DD and QSFP56 ports.

Q: Will any 400G port support this breakout?
A: Only ports and platforms that explicitly support 400G to 2x200G breakout. Check your device’s documentation.

Q: What are the connectors?
A: One QSFP-DD on the host side and two QSFP56 on the fanout ends.

Q: Is this cable active or passive?
A: Passive. It provides ultra-low latency and requires compatible ports that can drive passive copper.

Q: Can I mix vendors on each end?
A: Interoperability can be vendor-specific. Use with matching-coded ports for best results.

Q: What is the maximum distance for this model?
A: 1 meter.

Technical Specifications

- Form factor: QSFP-DD (host) to 2x QSFP56 (fanout)
- Data rate: 400G aggregate to 2x 200G
- Lane mapping: 8x50G PAM4 to 2x(4x50G) PAM4
- Cable type: Direct Attach Copper (DAC), passive
- Base standards: 400GBASE-CR8 and 200GBASE-CR4
- Reach: 1 meter
- Connectors: QSFP-DD male to 2x QSFP56 male
- Hot-pluggable ends; no optics or power required
- Typical use: 400G port breakout to two 200G switch/router ports
- Compliance: RoHS
- Platform requirement: 400G port must support 2x200G breakout

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