Mellanox SN3700-VS2FC 200GbE 32-Port QSFP56 Switch Cumulus Used
Quick answer: NVIDIA Spectrum-2 SN3700 SN3700-VS2FC used, bench-tested. NVIDIA Spectrum-2 SN3700 with 32 QSFP56 ports at 200GbE, 6.4 Tb/s switching capacity (32 × 200GbE, non-blocking), 425 ns, 42 MB buffer, 1U and P2C airflow, shipping with the Cumulus Linux image.
In stock: SN3700-VS2FC is in stock — availability is confirmed per part number, so send the exact model you need and we check the shelf before quoting.
Need a quote? Message WhatsApp +86 13068616914 with the part number (for example SN3700-VS2FC) and the quantity — we reply with price, condition notes and photos of the actual unit. No price is listed here because every order is quoted per part number.
NVIDIA Spectrum-2 SN3700 SN3700-VS2FC
The NVIDIA Spectrum-2 SN3700 (VS2FC) is the Cumulus Linux build of the 32-port 200GbE switch: 6.4 Tb/s switching capacity (32 × 200GbE, non-blocking), 8.33 Bpps, 425 ns latency and a 42 MB shared buffer. Cumulus gives you standard Linux tooling — NVUE, Ansible, NETCONF/YANG — over a 200G leaf that also breaks out to 100G and 50G servers.
Condition: Used — cleaned, re-flashed and bench-tested on our own test line before it is listed. 90-day warranty from delivery.
| Specification | Details |
|---|---|
| Part number | SN3700-VS2FC |
| Family | NVIDIA Spectrum-2 SN3700 |
| Switch silicon | NVIDIA Spectrum-2 |
| Ports | 32 × 200GbE QSFP56 |
| Port speed | 200GbE per port (100/50/40/25GbE with breakouts) |
| Connectors | QSFP56 (32 ports) |
| Switching capacity | 6.4 Tb/s switching capacity (32 × 200GbE, non-blocking) |
| Latency | 425 ns |
| Packet buffer | 42 MB shared packet buffer |
| Airflow | P2C — power-to-connector (front-to-back) |
| Form factor | 1U rackmount, standard depth |
| Dimensions | 44 × 428 × 559 mm |
| Power | 2 × hot-swap AC PSU (1+1), 6 × hot-swap fans |
| Management | x86 quad-core control plane, 8 GB RAM, 32 GB SSD |
| Software | NVIDIA Cumulus Linux |
Key features
- 32 × 200GbE QSFP56 ports
- 6.4 Tb/s switching capacity (32 × 200GbE, non-blocking), 8.33 Bpps
- 425 ns latency, 42 MB buffer
- Cumulus Linux for automation and EVPN-VXLAN
- Breakout to 2 × 100GbE or 4 × 50GbE
- RoCEv2 with PFC and ECN
Typical deployments
200G leaf/spine with automation-first operations, EVPN-VXLAN fabrics, and storage or AI networks built on RoCEv2.
What is included
- Switch chassis with both power supplies
- Fan units (P2C)
- Rail kit
- Condition report and bench-test notes
Not included
- QSFP56 optics and cables
- Cumulus licence transfer paperwork (we tell you the exact state)
SN3700-VS2FC in the lineup
Same hardware as VS2F, different network OS. Choose this build when your team already runs Cumulus; choose VS2F when the switch will be managed through Onyx.
How it compares with models we also stock
| Model | Fabric | Ports | Best for |
|---|---|---|---|
| SN3700-VS2FC | Ethernet 200G | 32 QSFP56 | 200G leaf with Cumulus |
| SN3700-VS2F | Ethernet 200G | 32 QSFP56 | Same hardware with Onyx |
| SN3700-CS2FC | Ethernet 100G | 32 QSFP28 | 100G-only build with Cumulus |
| SN4600-VS2RC | Ethernet 200G | 64 QSFP56 | 200G spine, 2U, Cumulus |
Why buy this switch from Zhongxin Data
- Bench-tested on our own in-house test line — ports, fans and power supplies are checked before the unit leaves.
- We quote only what we can physically confirm: the exact part number, airflow direction and condition notes come from the unit in front of us.
- Used enterprise switches at secondary-market pricing, with a 90-day warranty from delivery.
- Worldwide shipping from Hong Kong, China; consolidation with servers, NICs and optics from the same rack is routine.
Request a quote
Send the part number SN3700-VS2FC, the quantity you need and your destination to WhatsApp +86 13068616914 (or reply to any thread on zhongxindata.hk). We confirm availability against the exact model before quoting, and we can quote alternative airflow builds or port-count variants from the same family if they fit your rack better.
Frequently asked questions
How many ports does the SN3700 have?
32 QSFP56 ports at 200GbE each — not 36. The 36-port 100GbE figure belongs to the SB7700 EDR InfiniBand switch, a different platform.
What speed can each port run?
200GbE native, or 2 × 100GbE / 4 × 50GbE with breakouts, so one switch serves 200G uplinks and 100G or 50G servers at the same time.
Which network OS is on it?
Onyx on VS2F. The Cumulus Linux build is VS2FC and the ONIE build is VS2FO.
Does it support RoCEv2?
Yes, with PFC and ECN, and the 42 MB shared buffer absorbs bursts better than the 12 MB buffer of the older SN2700.
Is this InfiniBand?
No. It is Ethernet. For native InfiniBand at 100G the SB7700 is the matching platform; at 400G it is the Quantum-2 QM9700/QM9790.
What warranty do you provide?
90-day warranty from delivery, after bench testing on our own line.
Available at Zhongxin Data — enterprise network hardware specialists. Worldwide shipping from Hong Kong, China.
Product image is a reference image for the form factor — revision, label and airflow sticker vary by batch. Ask us for photos of the actual unit before you commit.