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Cisco

Cisco QDD-400-CU2M | Optics: 400G | QSFP-DD | 400GBASE-CR8 | wavelength: N/A | reach: 2 m | connector: QSFP-DD to QSFP-DD | cable: passive DAC

SKU:QDD-400-CU2M

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Description

Compact 400G QSFP-DD passive copper DAC for ultra-low-latency, short-reach interconnects. Provides 400GBASE-CR8 performance over 2 m, ideal for top-of-rack and spine–leaf architectures with minimal power and maximum simplicity.

Features

- Low-cost, low-latency 400G in-rack connectivity
- QSFP-DD high-density interface
- No optics or external power required
- Standards-based 400GBASE-CR8 compliance
- Reliable, simple deployment

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 it vendor-coded?
A: Yes, it is coded for specific platforms. Check your device’s compatibility matrix.

Q: Does it support breakout?
A: No. This is a straight 400G-to-400G DAC. Use a dedicated breakout cable for 4x100G or 8x50G.

Q: What applications is 2 m suited for?
A: Top-of-rack and adjacent device connections within the same rack.

Q: Any special configuration required?
A: Typically plug-and-play; ensure ports are set for 400G PAM4 and auto-negotiation/link training as per platform.

Technical Specifications

- Data rate: 400 Gb/s (8 x 50G PAM4)
- Form factor: QSFP-DD to QSFP-DD
- Interface standard: 400GBASE-CR8
- Cable type: Passive copper DAC
- Length: 2 m
- Connectors: QSFP-DD male to QSFP-DD male
- Latency: Near-zero (passive copper)
- Operating temperature: 0 to 70 °C (commercial)
- Compliance: QSFP-DD MSA, RoHS
- Use case: Short in-rack 400G switch-to-switch or switch-to-NIC links

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