FPR9K-FAN=: What Is It, Why It Matters, and H
Understanding the FPR9K-FAN= in Cisco Hardware Ec...
Core Architecture & Performance Capabilities
The Cisco Nexus N3K-C31108PC-V is a 1RU Layer 2/3 switch optimized for mixed-speed data center environments, combining 48x10G SFP+ ports and 6xQSFP28 uplinks (supporting 40G/100G connectivity). Key technical highlights include:
- Switching Capacity: 1.28 Tbps with 960 Mpps forwarding rate, ensuring wire-speed performance for latency-sensitive workloads like virtualization and AI/ML pipelines.
- Port Flexibility: QSFP28 ports can be split into 4x25G or 4x10G via breakout cables, expanding total usable ports to 72x10G or 24x25G + 48x10G.
- Power Efficiency: Dual 500W hot-swappable power supplies (AC/DC options) with PHY-less design, reducing energy consumption by 15% compared to traditional switches.
Competitive Edge Over Similar Models
Hybrid Speed Versatility
Unlike the N3K-C3172TQ (48x10GBase-T + 6xQSFP+), the N3K-C31108PC-V prioritizes fiber-centric deployments with SFP+ ports, eliminating copper cabling limitations in high-density racks. Its VXLAN/EVPN integration supports seamless multi-tenant cloud architectures.
Cost-Effective Scalability
- Buffer Management: 9MB shared packet buffer prevents congestion during traffic bursts in financial trading platforms.
- Third-Party Optics Support: Validated with QSFP-100G-SR4 and QSFP-40G-LR4 transceivers, reducing TCO by 40% versus Cisco-branded modules.
| Feature | N3K-C31108PC-V | N3K-C3172TQ |
|---|---|---|
| Primary Port Types | 48 SFP+ + 6 QSFP28 | 48 10GBase-T + 6 QSFP+ |
| Max Uplink Speed | 100G | 40G |
| Typical Use Case | Cloud spine layers | Enterprise campus core |
| Power Draw (Max) | 440W | 440W |
Deployment Scenarios & Operational Insights
AI/ML Workload Backbones
The switch’s sub-1μs latency and RoCEv2 support make it ideal for GPU cluster interconnects. A 2024 deployment guide recommends pairing it with NVIDIA ConnectX-6 adapters and QSFP-100G-AOC10M active optical cables for <2W per-port power consumption.
Firmware Limitations
Non-XL variants require NX-OS image compression for upgrades beyond version 9.x due to 2GB bootflash constraints. The N3K-C31108PC-V-XL (16GB storage) avoids this limitation for future-proof operations.
Procurement Strategy via ITmall.sale
ITmall.sale offers certified refurbished N3K-C31108PC-V units at **9,800∗∗(739,800** (73% below Cisco’s 9,800∗∗(7336,480 list price), including:
- Lifetime Warranty: Covers fan modules and power supplies, with tested compatibility for third-party optics.
- Immediate Availability: Forward airflow (-FA) and reverse airflow (-RF) models in stock for colocation deployments.
- Pre-Configured Firmware: Ships with NX-OS 7.0(3)I7(2) to avoid BIOS checksum errors during setup.
FAQs: Critical Implementation Queries
Q: Can the QSFP28 ports operate at 25G without breakout cables?
A: Yes—via auto-negotiation when connected to 25G devices like Intel E810 NICs.
Q: Is third-party DAC support reliable?
A: Cisco’s Validated Design program certifies Arista CAB-Q-100G-3M cables, though firmware updates may require genuine Cisco DACs.
Q: What’s the end-of-support timeline?
A: Cisco plans to retire the series by 2026-2027, but refurbished units remain viable through 2030 with ITmall.sale’s firmware patches.
For enterprises balancing 10G access layer demands and 100G spine-tier readiness, the N3K-C31108PC-V delivers unmatched flexibility. Explore certified inventory and expert guidance at ITmall.sale’s Cisco Nexus portfolio to modernize data center networks without budget overruns.