QSFP-DD-400G-CU1M Cisco Compatible, 400G QSFP-DD Passive DAC Cable - 1m
Warranty: Lifetime
Quick answer: The QSFP-DD-400G-CU1M Cisco-compatible cable is a 1-meter passive 400G QSFP-DD to QSFP-DD direct-attach copper (DAC) cable for 400 Gigabit Ethernet links between switches or servers in the same rack. It is coded to work in Cisco switches that call for QSFP-DD-400G-CU1M. Resilient Tec sells it new, with a lifetime warranty and free US shipping from Knoxville, TN.
Cisco Compatible 400G QSFP-DD Passive DAC Cable - 1 Meter
This third-party 400G QSFP-DD Passive DAC cable is fully compatible with Cisco QSFP-DD-400G-CU1M, delivering reliable 400GbE connectivity for short-range ultra-high-speed networking applications up to 1 meter. Ideal for AI/HPC clusters, enterprise networking, hyperscale data centers, and high-bandwidth Ethernet environments requiring ultra-low latency copper interconnect connectivity.
Built to QSFP-DD MSA standards, it features QSFP-DD to QSFP-DD connectivity and pre-programmed EEPROM compatibility for seamless deployment with Cisco networking platforms. Backed by our lifetime warranty and rigorous testing—enjoy significant savings versus genuine Cisco OEM cables while maintaining reliable, high-performance connectivity.
Key Features
- Massive Cost Savings: Premium compatible 400G DAC cables at a fraction of OEM pricing—ideal for scaling AI, HPC, and enterprise networking environments affordably.
- Plug-and-Play Compatibility: Pre-programmed EEPROM enables seamless deployment with Cisco networking platforms.
- 400G QSFP-DD Connectivity: Supports ultra-high-density 400GbE connections for next-generation switches, servers, and storage environments.
- Low-Latency Passive Copper Design: Passive Twinax construction minimizes latency for high-performance computing and data center applications.
- 1-Meter Reach: Optimized for short-range intra-rack connections.
Compatibility
Designed for use with Cisco networking platforms including Cisco Nexus 400G switches and other QSFP-DD compatible devices. Fully tested to ensure plug-and-play operation with no manual configuration required.
Specifications
- Part Number: QSFP-DD-400G-CU1M
- Form Factor: QSFP-DD
- Cable Type: Passive DAC (Direct Attach Copper)
- Data Rate: 400G
- Cable Length: 1 meter
- Connector: QSFP-DD to QSFP-DD
- Compatibility: Cisco QSFP-DD-400G-CU1M compatible
- Warranty: Lifetime
Frequently Asked Questions
What ports does it fit?
QSFP-DD ports running at 400G on both ends. It does not fit OSFP ports, and a QSFP28-only port cannot run it at 400G.
How long can a passive 400G DAC be?
Passive 400G copper is made for very short runs of a few meters at most. For longer links use 400G optics, such as SR8 over multimode fiber or DR4 over single-mode fiber.
Does it need power or configuration?
No. It is passive copper with no optics; the port reads its coding and brings the link up.
Compatible cable or genuine Cisco: what is the difference?
This is a new third-party cable programmed (coded) to be recognized by Cisco equipment that calls for this part number, at a fraction of the Cisco-branded price. Choose the genuine Cisco part only if your support contract or internal policy requires Cisco-branded parts.
What warranty and shipping come with it?
Resilient Tec's lifetime warranty. US standard shipping is free with no minimum, and orders typically arrive in 3 to 5 days.
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QDD-400G-SR8-S Cisco Compatible, 400G QSFP-DD SR8 Transceiver
QDD-400G-DR4-S Cisco Compatible, 400G QSFP-DD DR4 Transceiver
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Quick answer: The QSFP-DD-400G-CU1M Cisco-compatible cable is a 1-meter passive 400G QSFP-DD to QSFP-DD direct-attach copper (DAC) cable for 400 Gigabit Ethernet links between switches or servers in the same rack. It is coded to work in Cisco switches that call for QSFP-DD-400G-CU1M. Resilient Tec sells it new, with a lifetime warranty and free US shipping from Knoxville, TN.
Cisco Compatible 400G QSFP-DD Passive DAC Cable - 1 Meter
This third-party 400G QSFP-DD Passive DAC cable is fully compatible with Cisco QSFP-DD-400G-CU1M, delivering reliable 400GbE connectivity for short-range ultra-high-speed networking applications up to 1 meter. Ideal for AI/HPC clusters, enterprise networking, hyperscale data centers, and high-bandwidth Ethernet environments requiring ultra-low latency copper interconnect connectivity.
Built to QSFP-DD MSA standards, it features QSFP-DD to QSFP-DD connectivity and pre-programmed EEPROM compatibility for seamless deployment with Cisco networking platforms. Backed by our lifetime warranty and rigorous testing—enjoy significant savings versus genuine Cisco OEM cables while maintaining reliable, high-performance connectivity.
Key Features
- Massive Cost Savings: Premium compatible 400G DAC cables at a fraction of OEM pricing—ideal for scaling AI, HPC, and enterprise networking environments affordably.
- Plug-and-Play Compatibility: Pre-programmed EEPROM enables seamless deployment with Cisco networking platforms.
- 400G QSFP-DD Connectivity: Supports ultra-high-density 400GbE connections for next-generation switches, servers, and storage environments.
- Low-Latency Passive Copper Design: Passive Twinax construction minimizes latency for high-performance computing and data center applications.
- 1-Meter Reach: Optimized for short-range intra-rack connections.
Compatibility
Designed for use with Cisco networking platforms including Cisco Nexus 400G switches and other QSFP-DD compatible devices. Fully tested to ensure plug-and-play operation with no manual configuration required.
Specifications
- Part Number: QSFP-DD-400G-CU1M
- Form Factor: QSFP-DD
- Cable Type: Passive DAC (Direct Attach Copper)
- Data Rate: 400G
- Cable Length: 1 meter
- Connector: QSFP-DD to QSFP-DD
- Compatibility: Cisco QSFP-DD-400G-CU1M compatible
- Warranty: Lifetime
Frequently Asked Questions
What ports does it fit?
QSFP-DD ports running at 400G on both ends. It does not fit OSFP ports, and a QSFP28-only port cannot run it at 400G.
How long can a passive 400G DAC be?
Passive 400G copper is made for very short runs of a few meters at most. For longer links use 400G optics, such as SR8 over multimode fiber or DR4 over single-mode fiber.
Does it need power or configuration?
No. It is passive copper with no optics; the port reads its coding and brings the link up.
Compatible cable or genuine Cisco: what is the difference?
This is a new third-party cable programmed (coded) to be recognized by Cisco equipment that calls for this part number, at a fraction of the Cisco-branded price. Choose the genuine Cisco part only if your support contract or internal policy requires Cisco-branded parts.
What warranty and shipping come with it?
Resilient Tec's lifetime warranty. US standard shipping is free with no minimum, and orders typically arrive in 3 to 5 days.
You Might Also Need
QDD-400G-SR8-S Cisco Compatible, 400G QSFP-DD SR8 Transceiver
QDD-400G-DR4-S Cisco Compatible, 400G QSFP-DD DR4 Transceiver
All DAC cables