Used Mellanox SN3700-CS2FC 36-Port 100GbE QSFP28 Datacenter Switch
Used Mellanox SN3700-CS2FC 36-Port 100GbE QSFP28 Datacenter Switch
NVIDIA Mellanox Spectrum-2 SN3700 36-Port 100GbE QSFP28 Datacenter Switch
The NVIDIA Mellanox Spectrum-2 SN3700 36-Port 100GbE QSFP28 Datacenter Switch is a high-performance datacenter Ethernet switch powered by the NVIDIA Spectrum-2 ASIC, delivering 7.2 Tbps full duplex of non-blocking throughput with 36 × 100GbE QSFP28 (configurable as 36×100G / 72×50G / 144×25G / 4×200G) ports. Designed for AI/ML training clusters (GPU interconnect), it provides < 250 ns cut-through cut-through latency and 16 MB shared packet buffer shared packet buffer for lossless RoCE v2 RDMA transport.
Condition: Refurbished / Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.
| Specification | Details |
|---|---|
| Chip | Spectrum-2 |
| Ports | 36 × 100GbE QSFP28 (configurable as 36×100G / 72×50G / 144×25G / 4×200G) |
| Throughput | 7.2 Tbps full duplex |
| Latency | < 250 ns cut-through |
| Packet Rate | 5.4 Bpps |
| Buffer | 16 MB shared packet buffer |
| Power | ≤ 250W typical |
| Dimensions | 440 × 430 × 43 mm (1U) |
| Weight | 7.0 kg |
| Interfaces | 1× RJ45 management, 1× micro-USB console |
| Os | MLNX-OS, Cumulus Linux, SONiC |
| Features | VXLAN, EVPN, RoCE v2, PFC, ECN, DCB, IPv6, sFlow, Advanced Mirroring, NAT, NAT64, VRF, ACL 12K entries |
Key Features
- VXLAN
- EVPN
- RoCE v2
- PFC
- ECN
- DCB
- IPv6
- sFlow
- Advanced Mirroring
- NAT
- NAT64
- VRF
- ACL 12K entries
Typical Applications
AI/ML training clusters (GPU interconnect), cloud spine-leaf, storage fabrics (NVMe-oF), HPC, telecom edge
Frequently Asked Questions
\What is the Mellanox SN3700 switch used for?
The SN3700 is a 36-port 100GbE datacenter switch powered by the Spectrum-2 ASIC, optimized for AI/ML GPU clusters, NVMe-oF storage fabrics, and cloud spine-leaf topologies requiring lossless Ethernet with RoCE v2.
How does SN3700 compare to SN2700?
The SN3700 has 4 more 100G ports (36 vs 32), higher throughput (7.2 vs 6.4 Tbps), lower latency (<250 vs <300 ns), larger buffer (16 vs 12 MB), and supports 200G port mode. It uses the newer Spectrum-2 ASIC with advanced features like NAT, VRF, and larger ACL tables.
Can SN3700 run 200GbE ports?
Yes. The Spectrum-2 ASIC supports 200GbE mode on 4 QSFP28-DD ports (using 2×100G per port), enabling mixed-speed deployments.
Does SN3700 support RoCE for RDMA?
Yes. The SN3700 fully supports RoCE v2 (RDMA over Converged Ethernet) with PFC and ECN for lossless transport—critical for GPU-to-GPU communication in AI training.
Available at Zhongxin Data — enterprise network hardware specialists. Worldwide shipping from Hong Kong.