MSN3700-CS2FC - 32x100GbE Spectrum-2 Switch | NVIDIA Mellanox
MPN： MSN3700-CS2FC ✓ 啟用中MSN3700-CS2FC 概覽
A data center spine/leaf switch is the core building block of cloud-scale layer-2 and layer-3 network fabrics. In the network hierarchy, a spine switch aggregates leaf switches to form non-blocking Clos topologies; the Spectrum-2 platform belongs to the broader family of Open Ethernet switching systems designed for software-defined networking (SDN) and runs the ONIE-installed Cumulus Linux network operating system on an x86 management CPU.
Key features include fully splittable QSFP28 ports supporting speeds from 1GbE to 100GbE, expandable to 128x 10/25GbE ports with splitter cables, dual redundant AC power supplies rated 100-264 V, and L3 managed switching with advanced SDN capabilities. The Spectrum-2 ASIC provides consistent low latency and deep buffering for East-West traffic.
The MSN3700-CS2FC combines the Spectrum-2 silicon with an open ecosystem: ONIE boot loader, Cumulus Linux, and standard x86 CPUs allow full automation through DevOps tooling. Back-to-front (P2C) airflow suits hot-aisle exhaust data center layouts, and the standard-depth chassis fits shallow racks common in colocation facilities.
Typical applications include cloud-scale leaf/spine fabrics, hyperconverged storage networks, big data and analytics clusters, and high-density 25GbE server access using breakout cables. It is also deployed as a super-spine aggregation switch in web-scale IT.
Design consideration: verify airflow direction at ordering time; the -CS2FC (P2C/back-to-front) variant must not be mixed with front-to-back (C2P) units in the same rack without ducting planning.
This page synthesizes distributor pricing, drop-in platform alternatives, and practical deployment notes not found in the manufacturer datasheet, with pricing verified as of 2026-10-19.
直接替換替代品，適用於 MSN3700-CS2FC — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MSN3700-CS2FC （相同外形與佔位） — 差異在於 Airflow, Power Supplies, Form Factor, Management, ASIC.
MSN3700-CS2RC
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →920-9N201-00F7-0C0
✅ 直接替換📋 參考替代品（不在目錄中）
SSE-SN3700-CS2FC
✅ 直接替換📋 參考替代品（不在目錄中）
MSN3700-VS2FC
✅ 直接替換聯絡詢價
查看資料表 →SSE-SN3700-CS2RC
✅ 直接替換📋 參考替代品（不在目錄中）
MSN3700-CS2FC 最大額定值與電氣特性
| Product Type | 1U managed L3 Ethernet switch |
| ASIC | Mellanox Spectrum-2 |
| Port Configuration | 32 x 100GbE QSFP28 |
| Switching Capacity | 6.4 Tbps |
| Forwarding Rate | 4.76 Bpps |
| Latency | 425 ns |
| Port Speed Range | 1GbE to 100GbE (splittable to 128 x 10/25GbE) |
| Form Factor | 1U rack-mountable |
| Management | L3 managed, x86 CPU, ONIE, Cumulus Linux |
| Airflow | P2C (back-to-front) |
| Power Supplies | 2 x AC, redundant (100-264 V) |
| 輸入電壓範圍 | 100-264 V AC |
| Depth | Standard depth |
| Mounting | Rack-mountable (rail kit included) |
| Series | SN3000 (Spectrum-2) |
MSN3700-CS2FC standard 腳位配置指南
MSN3700-CS2FC（standard 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： MSN3700-CS2FC.
請參閱 資料表 以查看完整腳位配置。
典型應用
MSN3700-CS2FC 適用於 6 應用s: Cloud-Scale Leaf/Spine Fabrics, Hyperconverged Storage Networks, Big Data and Analytics Clusters, High-Density 25GbE Server Access, Super-Spine Aggregation, SDN and Network Automation Deployments.
Cloud-Scale Leaf/Spine Fabrics
The MSN3700-CS2FC is purpose-built as a spine switch in Clos topologies for cloud and web-scale data centers. Its 32 x 100GbE QSFP28 uplinks with 6.4 Tbps of non-blocking capacity allow a single spine to connect up to 32 leaf switches at 100G, or more at lower speeds, while the 425 ns cut-through latency keeps fabric hop latency predictable. Because every port is splittable down to 10/25GbE, the same chassis can serve as a high-density leaf connecting 128 servers at 25G via breakout cables. Cumulus Linux on the x86 CPU enables full fabric automation through standard DevOps tooling, and the dual redundant AC supplies maintain uptime during PSU failures. Standard-depth 1U design fits dense colocation racks with P2C back-to-front airflow matching hot-aisle exhaust layouts.
推薦
Hyperconverged Storage Networks
Hyperconverged infrastructure (HCI) clusters generate heavy East-West replication and rebalancing traffic that demands high bisection bandwidth and consistent latency. The MSN3700-CS2FC addresses this with 6.4 Tbps of switching capacity and a 4.76 Bpps forwarding rate on the Spectrum-2 ASIC, ensuring storage replication traffic does not queue behind compute traffic in shallow-buffer designs. Its 100GbE ports can directly attach NVMe-oF storage arrays or split to 25GbE for host connectivity, supporting flexible blocking ratios. Deep buffering and consistent low latency protect iSCSI, NVMe/TCP, and distributed-storage protocols from microbursts. Cumulus Linux telemetry provides visibility into congestion, and dual AC power supplies plus front/serviceable airflow options make it deployable in both new and legacy facility power layouts with 100-264 V input ranges.
推薦
Big Data and Analytics Clusters
Distributed analytics frameworks such as Spark, Hadoop, and AI training jobs are dominated by all-to-all shuffle traffic that stresses spine fabrics. The MSN3700-CS2FC provides the 6.4 Tbps bisection bandwidth and 4.76 Bpps packet rate needed to keep shuffle phases from stalling job completion, while the 425 ns per-hop latency of the Spectrum-2 ASIC minimizes RPC tail latency across the cluster. Ports spanning 1GbE to 100GbE let operators connect management, compute, and high-speed data interfaces on one fabric with varied oversubscription. The Open Ethernet software stack (ONIE plus Cumulus Linux) supports telemetry-driven traffic engineering and integration with container networking. Standard-depth 1U chassis and P2C airflow make it straightforward to add spine capacity incrementally in existing 19-inch racks without airflow redesign.
推薦
High-Density 25GbE Server Access
When deployed as a leaf switch with QSFP28 breakout cables, the MSN3700-CS2FC becomes a 128-port 25GbE server access switch in 1U, giving full-rack connectivity at any speed per Insight documentation. This eliminates the need for separate 25G TOR switches in dense virtualization clusters. Each 100G QSFP28 uplink can break out to four 25GbE SFP28 host connections using passive DAC or AOC cables, keeping cable costs low inside the rack while 100G leaves the rack toward the spine. The Spectrum-2 ASIC's consistent 425 ns latency and deep buffering handle East-West VM migration and storage traffic simultaneously. Dual redundant AC supplies and Cumulus Linux automation make large fleets of leaf switches manageable with identical, scriptable configurations.
推薦
Super-Spine Aggregation
In multi-pod and multi-site cloud architectures, the SN3000 series scales upward to super-spine roles, and the MSN3700-CS2FC serves as a 100G aggregation point interconnecting pod spines. Its 32 x 100GbE ports provide up to 3.2 Tbps of pod-to-pod bandwidth per switch, and the Layer-3 feature set of the Spectrum-2 platform supports routed fabrics with ECMP across many parallel links. The 425 ns latency adds negligible delay to inter-pod traffic even through multiple fabric hops. ONIE and Cumulus Linux enable zero-touch provisioning when new spines are racked, critical for rapid capacity expansion. Dual 100-264 V AC supplies tolerate varied facility power, and NetworkTigers notes the platform's compact 1U form keeps interconnect density high in super-spine rows where rack units are scarce.
推薦
SDN and Network Automation Deployments
Organizations building software-defined networks choose Open Ethernet hardware like the MSN3700-CS2FC because it decouples hardware from software: the ONIE installer bootstraps Cumulus Linux (or alternative NOS images) on the integrated x86 management CPU. The Spectrum-2 ASIC exposes programmatic control suitable for SDN controllers, with Layer-2 and Layer-3 features supporting advanced SDN capabilities described in the NVIDIA SN3000 datasheet. Operators gain Linux-native automation, streaming telemetry, and DevOps toolchains for configuration-as-code across the 32 x 100GbE ports. The 6.4 Tbps capacity and 4.76 Bpps rate ensure the hardware is not the bottleneck in automated fabrics. Dual AC power supplies, rack rails, and standard-depth chassis complete a deployment-ready package for enterprises transitioning from vendor-locked CLI management to automated, API-driven network operations.
推薦
推薦產品摘要
工程參考資料，適用於 MSN3700-CS2FC — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MSN3700-CS2RC | 920-9N201-00F7-0C0 | SSE-SN3700-CS2FC | MSN3700-VS2FC |
|---|---|---|---|---|---|
| Package / Form Factor | 1U rack-mount | 1U rack-mount - same | 1U rack-mount - same | 1U rack-mount - same | 1U rack-mount - same |
| Brand | NVIDIA (Mellanox) | NVIDIA | NVIDIA | Supermicro | NVIDIA |
| Port Configuration | 32 x 100GbE QSFP28 | 32 x 100GbE QSFP28 | 32 x 100GbE QSFP28 | 32 x 100GbE QSFP28 | 32 x 200GbE QSFP56 |
| Lifecycle Status | Active / secondary market | Active / secondary market | Active (NVIDIA OPN) | EOL at Supermicro | Active |
| Operating System | Cumulus Linux / ONIE | Cumulus Linux / ONIE | Cumulus Linux / ONIE | Cumulus Linux / ONIE | Cumulus Linux / ONIE |
主要差異化特點
- Dual identity Mellanox/NVIDIA OPN with active secondary supply chain (對比SSE-SN3700-CS2FC)
- Consistent 425 ns cut-through latency (對比MSN3700-VS2FC)
- Fully splittable ports up to 128 x 10/25GbE (對比MSN3700-CS2RC)
設計說明
Airflow direction is the single most common ordering mistake on the SN3000 platform. NVIDIA's own ordering documentation warns to pay attention to airflow direction at ordering time: -CS2FC is P2C (back-to-front), while -CS2RC is front-to-back. Mixing directions in one rack without blanking panels and ducting causes hot-air recirculation that can raise switch intake temperatures well above specification. Verify your rack's cold-aisle/hot-aisle containment before ordering spares so replacements match installed units.
The MSN3700-CS2FC uses two AC power supplies rated 100-264 V. For full N+1 redundancy, connect each PSU to a separate power feed or A/B branch circuits; on a single feed, the redundancy is nominal only. Confirm facility voltage stays within the 100-264 V window - low 100 V-class circuits under load can approach the lower limit. Per ServerSupply and LSOLink listings, the rail kit is included and the chassis is standard depth, which simplifies deployment in shallow colocation cabinets.
Plan for platform lifecycle: NVIDIA has issued EOL notifications (LCR-000875) covering Mellanox-era products with suggested replacements, and Supermicro has discontinued the SSE-SN3700 series. Before standardizing on this platform for new builds, confirm the production status of your specific OPN and evaluate the SN4000 series as the forward path. The secondary market (NetworkTigers, Core 4 Solutions, BrightStar) currently offers new-sealed and refurbished MSN3700 units, with the NVIDIA OPN 920-9N201-00F7-0C0 identifying identical hardware.
合規資訊
Compliance data was not present in the provided web data for this complete switch system. Refer to the NVIDIA SN3000 series datasheet and regulatory documentation for declarations.
