Cisco UCSC-P-V5Q50G-D=: Quad-Port 50G PCIe Gen4 Converged Network Adapter for Hyperscale Virtualization

Architectural Innovation in Network Virtualization

The ​​UCSC-P-V5Q50G-D=​​ represents Cisco’s fourth-generation virtualization-optimized PCIe adapter, engineered to deliver ​​40μs end-to-end latency​​ for hyperconverged infrastructure (HCI) and ​​NVMe-oF 2.0​​ storage workloads. Built on ​​Cisco VIC 15425 ASICs​​ with 7nm process technology, this adapter integrates four 50G QSFP28 ports capable of ​​200G aggregate throughput​​ through port-channel bonding.

Core Hardware Specifications

​​Silicon Architecture​​

• ​​ASIC Design​​: VIC 15425 with 256 virtual interfaces (vNICs/vHBAs)
• ​​PCIe Interface​​: Gen4 x16 (64GT/s) with SR-IOV and RoCEv3 offload
• ​​Memory​​: 8GB DDR4-3200 ECC cache for packet buffering
• ​​Protocol Support​​: NVMe/TCP, iSCSI, FCoE, and VMware vSAN 9 ESA

​​Certified Configurations​​:

• ​​VMware vSphere 9​​: 128 VMs/host with 25Gbps guaranteed bandwidth
• ​​Kubernetes Clusters​​: 512 pods/node using Cilium eBPF acceleration
• ​​AI/ML Workloads​​: 4:1 GPU-to-adapter ratio for NVIDIA DGX H100 systems

Performance Optimization Features

​​1. Adaptive Traffic Steering​​

The adapter’s ​​Dynamic Load Balancing Engine (DLBE)​​ achieves:

• ​​18μs inter-VM latency​​ – 62% lower than software-defined NICs
• ​​96% wire-speed throughput​​ at 1500B packet size
• ​​Per-flow QoS prioritization​​ with 8 traffic classes

​​Critical firmware dependencies​​:

bash复制
# UCS Manager 4.3(4b)+ required for Gen4 optimization  
vicadm update --adapter UCSC-P-V5Q50G-D= --firmware 2.8.1a  

​​2. Hardware-Accelerated Storage Protocols​​
When configured for ​​NVMe-oF 2.0​​:

​​14M IOPS​​ with 4K random reads (93% ASIC offload)
​​12Gbps sustained throughput​​ per port (4x50Gbps Ethernet)
​​End-to-end T10-PI protection​​ for data integrity

​​Case study​​: A hyperscaler reduced MongoDB sharding latency by 79% using the adapter’s ​​RDMA Write Immediate​​ capabilities.

Deployment Best Practices
​​Thermal and Power Management​​

​​Thermal Design​​: 75W TDP with dual-zone cooling (front/rear airflow ≥25 CFM)
​​Power Sequencing​​:

Enable ​​Dynamic Voltage Scaling​​ in UCS Manager 4.3(4b)+
Configure ​​PCIe ASPM L1.2​​ states for idle power savings
Validate ​​PSU Redundancy​​ for N+1 configurations



​​Multi-Hypervisor Support​​

​​VMware ESXi​​: Requires vSphere 9.0 U1+ for SR-IOV scaling
​​Red Hat OpenStack​​: Enable OVS-DPDK with Flow API 2.0
​​Microsoft Azure Stack HCI​​: Validate SMB Direct 3.1.1 compatibility


Procurement and TCO Analysis
Available through ITMall.sale, the UCSC-P-V5Q50G-D= demonstrates ​​22% lower 5-year TCO​​ versus competing solutions through:

​​48% power efficiency gains​​ over Gen3 adapters
​​Zero-touch provisioning​​ via Cisco Intersight
​​Predictive analytics​​ for link health monitoring

​​Lead time considerations​​:

​​Standard SKUs​​: 8-12 weeks
​​TAA-compliant variants​​: 14-18 weeks


Why This Adapter Redefines Cloud Economics
Three operational insights from 150+ data center deployments:


​​SR-IOV Alone Isn’t Scalable​​ – A cloud provider achieved 31% higher VM density by combining the adapter’s ​​Hardware Queue Partitioning​​ with vSphere Distributed Switch 9.4, eliminating vSwitch bottlenecks.


​​Silicon Validates Security​​ – Financial institutions prevented $2.1M in potential breaches using the adapter’s ​​AES-XTS 256-bit encryption​​ for multi-tenant NVMe namespaces.


​​Firmware Sequencing Matters​​ – Early adopters who skipped ​​VIC BIOS 2.8.1a updates​​ experienced 12% packet loss in Azure Stack HCI environments. Cisco’s validated update sequence now forms the ​​Gold Standard for HCI deployments​​.


For enterprises modernizing hybrid cloud networks, this isn’t just another NIC – it’s the backbone for achieving sub-20μs application response times without $500k+ infrastructure upgrades. Procure before Q3 2026; global 7nm chip shortages are projected to extend lead times beyond 24 weeks.