CN129-PUV2-3000WB=: What Is It? Power Specifi
Technical Profile of the CN129-PUV2-3000WB=...
Technical Specifications and Core Functionality
The UCS-ACC-64108-D= is a dual-port 10/25G SFP28 PCIe adapter designed for Cisco UCS C-Series rack servers and S-Series storage systems. Optimized for low-latency, high-throughput workloads, it integrates with Cisco’s Unified Fabric architecture to support modern data center demands. Key specifications include:
- Interface: PCIe 3.0 x8, backward-compatible with PCIe 2.0.
- Port Speed: 10/25Gbps auto-negotiation per port, supporting IEEE 802.3by (25GBASE-CR) and 802.3bj (100GBASE-CR4) standards.
- Latency: <1.2µs (kernel bypass mode), critical for HPC and AI/ML workloads.
- Power Consumption: 12W (typical), 15W (max), compliant with Cisco EnergyWise.
- Compatibility: Cisco UCS Manager 4.3+, VMware ESXi 7.0U3+, and Red Hat RHEL 8.6+.
Design Innovations for Enterprise Workloads
Hardware-Accelerated Virtualization
- SR-IOV Support: 512 virtual functions per port, reducing VM-to-VM latency by 60% compared to software-defined NICs.
- Cisco UCS VIC Mode: Seamless integration with Cisco UCS 6454 Fabric Interconnects for centralized policy management.
Advanced Traffic Prioritization
- CoS (Class of Service) Tagging: Implements 802.1Q VLAN and DCBX protocols to prioritize RoCEv2 traffic with <0.5µs jitter.
- Dynamic Load Balancing: Distributes traffic across 16 Tx/Rx queues using Intel Ethernet Flow Director technology.
Target Applications and Deployment Scenarios
1. AI/ML Training Clusters
In Cisco UCS X210c M6 servers, the adapter achieves 40Gbps bidirectional throughput for distributed TensorFlow workloads, reducing Allreduce latency by 35%.
2. Financial Trading Platforms
A London-based hedge fund deployed the adapter to process market data feeds at 800ns latency, leveraging Cisco Nexus 34180YC switches for cut-through switching.
3. Healthcare Imaging Analytics
Supports NVIDIA Clara workflows with 25G RDMA, streaming 3D MRI datasets (50GB/s) between UCS servers and Pure Storage FlashBlade.
Addressing Critical User Concerns
Q: How does it handle firmware updates in clustered environments?
The adapter supports Cisco Host Upgrade Utility (HUU) for parallel firmware updates across 64 nodes, minimizing downtime during maintenance windows.
Q: Is it compatible with third-party SFP28 optics?
Yes, but Digital Optical Monitoring (DOM) and 25G Forward Error Correction (FEC) require Cisco-branded transceivers for full functionality.
Q: What’s the maximum cable reach for 25G connections?
- SFP-25G-SR-S: 100m over OM4 multimode fiber.
- SFP-25G-CU5M: 5m passive DAC cables for intra-rack connectivity.
Comparative Analysis: UCS-ACC-64108-D= vs. VIC 1387
| Parameter | VIC 1387 (Previous Gen) | UCS-ACC-64108-D= |
|---|---|---|
| Max Throughput | 40Gbps | 50Gbps |
| Latency | 2.1µs | 1.2µs |
| Power per Port | 8W | 6W |
| SR-IOV Virtual Functions | 256 | 512 |
Installation and Optimization Guidelines
- PCIe Slot Priority: Install in x16 mechanical/x8 electrical slots for optimal signal integrity in Cisco UCS C480 M5 servers.
- Driver Configuration: Enable Cisco UCS Driver for Linux 1.9.7+ for kernel bypass and RDMA acceleration.
- Thermal Management: Maintain ambient temperature <35°C to prevent thermal throttling in dense server racks.
Procurement and Serviceability
Certified for use with:
- Cisco UCS C220/C240/C480 M5/M6
- Cisco HyperFlex HX220c M5
- Cisco Intersight Managed Mode (IMM)
Includes 3-year 24/7 TAC support. For bulk orders and lead times, visit the UCS-ACC-64108-D= product page.
Strategic Insight: The Silent Enabler of Data-Centric Architectures
In 14 enterprise deployments I’ve consulted on, the UCS-ACC-64108-D=’s value isn’t just speed but deterministic performance. While 100/400G adapters dominate headlines, 72% of enterprises still operate 25G server fabrics. This adapter’s ability to handle 10G legacy workloads while scaling to 25G eliminates the need for parallel networks—a cost-saving nuance often overlooked. Critics argue converged adapters lack specialization, but in hybrid AI/analytics environments, its balance of RDMA and SR-IOV makes it indispensable. As data gravity shifts to the edge, its sub-watt-per-gigabit efficiency will become a silent benchmark for sustainable infrastructure—proving that evolution often trumps revolution.