UCS-CPU-I6434=: High-Density Compute Module f
Core Architecture & Silicon Innovations The U...
Technical Specifications and Design
The CAB-ETH-40G-20M= is a 40Gbps active optical cable (AOC) engineered for high-density Cisco networking environments. Designed for short-to-mid-range deployments, it combines QSFP+ connectors with a 20-meter reach, ideal for spine-leaf architectures or cross-rack connectivity. Core features include:
- Data rate: 40Gbps (4x10G lanes)
- Cable type: OM3/OM4 multimode fiber with low-latency signal integrity
- Power consumption: <1.5W per end
- Compatibility: Cisco Nexus 9000 series, Catalyst 9500 switches, and UCS blade systems.
Performance Advantages Over Passive DAC Cables
Why choose CAB-ETH-40G-20M= instead of direct attach copper (DAC)?
- Longer reach: Supports 20 meters vs. DAC’s 7m limit, reducing intermediate hardware needs.
- Heat management: Fiber’s lower thermal output suits high-density racks.
- EMI immunity: Optical transmission avoids electromagnetic interference in industrial settings.
For 40G deployments exceeding 10m, CAB-ETH-40G-20M= reduces latency spikes and packet loss risks inherent in extended copper runs.
Addressing Common Deployment Questions
1. Is CAB-ETH-40G-20M= hot-swappable?
Yes—it supports Cisco’s hot-swap capability, but ensure linked devices are powered down during initial installation to avoid port damage.
2. Can it be used for 4x10G breakout configurations?
No. Unlike passive DACs, this AOC is optimized for native 40G end-to-end links. For breakout setups, use dedicated splitter cables.
3. How does temperature affect performance?
The cable operates reliably between 0°C to 70°C, but avoid sharp bends or tension near connectors to prevent fiber microfractures.
Where to Source Authentic CAB-ETH-40G-20M= Cables
Counterfeit AOCs risk network instability and void Cisco Smart Net warranties. Trusted vendors like itmall.sale provide Cisco-validated CAB-ETH-40G-20M= cables with full compliance documentation.
Final Take: Balancing Cost and Reliability
While third-party AOCs may appear cheaper, the CAB-ETH-40G-20M=’s adherence to Cisco’s signal integrity standards ensures seamless integration with performance monitoring tools like DCNM. In mission-critical environments, cutting corners on cabling often translates to costly troubleshooting—invest in verified solutions upfront.