{"product_id":"mellanox-sn3700-vs2r-200gbe-32-port-qsfp56-switch-used","title":"Mellanox SN3700-VS2R 200GbE 32-Port QSFP56 Switch Used","description":"\u003cp style=\"margin:14px 0 18px;padding:12px 16px;background:#f4f7fb;color:#1a1a1a;border-radius:6px;font-size:15px;line-height:1.6;\"\u003e\u003cstrong\u003eQuick answer:\u003c\/strong\u003e NVIDIA Spectrum-2 SN3700 MSN3700-VS2R 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 latency, 42 MB buffer, 1U and C2P airflow, running Onyx.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 10px;padding:12px 16px;background:#eef8ef;border-left:4px solid #2e7d32;color:#1a1a1a;border-radius:4px;font-size:15px;line-height:1.6;\"\u003e\u003cstrong\u003eIn stock:\u003c\/strong\u003e MSN3700-VS2R is in stock — availability is confirmed per part number, so send the exact model you need and we check the shelf before quoting.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 18px;padding:12px 16px;background:#f7f9fc;border:1px solid #dde5ef;border-radius:6px;font-size:15px;line-height:1.6;\"\u003e\u003cstrong\u003eNeed a quote?\u003c\/strong\u003e Message WhatsApp \u003ca href=\"https:\/\/wa.me\/8613068616914\"\u003e+86 13068616914\u003c\/a\u003e with the part number (for example MSN3700-VS2R) 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.\u003c\/p\u003e\n\u003ch2\u003eNVIDIA Spectrum-2 SN3700\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Spectrum-2 SN3700 (VS2R)\u003c\/strong\u003e packs 32 QSFP56 ports of 200GbE into 1U: 6.4 Tb\/s switching capacity (32 × 200GbE, non-blocking), 8.33 Bpps, 425 ns latency and a 42 MB shared buffer for lossless RoCEv2. Each port breaks out to 2 × 100GbE or 4 × 50GbE, which makes it a 200G leaf and a 100G server aggregator in the same box. This build ships with Onyx and C2P airflow.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Used — cleaned, re-flashed and bench-tested on our own test line before it is listed. 90-day warranty from delivery.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:32%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMSN3700-VS2R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFamily\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVIDIA Spectrum-2 SN3700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSwitch silicon\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVIDIA Spectrum-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePorts\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32 × 200GbE QSFP56\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePort speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200GbE per port (100\/50\/40\/25GbE with breakouts)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnectors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eQSFP56 (32 ports)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSwitching capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.4 Tb\/s switching capacity (32 × 200GbE, non-blocking)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e425 ns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePacket buffer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e42 MB shared packet buffer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eC2P — connector-to-power (back-to-front)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eForm factor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1U rackmount, standard depth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e44 × 428 × 559 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 × hot-swap AC PSU (1+1), 6 × hot-swap fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManagement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ex86 quad-core control plane, 8 GB RAM, 32 GB SSD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSoftware\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVIDIA Onyx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e32 × 200GbE QSFP56 ports\u003c\/li\u003e\n\u003cli\u003e6.4 Tb\/s switching capacity (32 × 200GbE, non-blocking), 8.33 Bpps\u003c\/li\u003e\n\u003cli\u003e425 ns latency, 42 MB shared buffer\u003c\/li\u003e\n\u003cli\u003eBreakout to 2 × 100GbE or 4 × 50GbE per port\u003c\/li\u003e\n\u003cli\u003eRoCEv2 with PFC and ECN for lossless storage and AI traffic\u003c\/li\u003e\n\u003cli\u003eVXLAN and EVPN support, C2P airflow\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical deployments\u003c\/h3\u003e\u003cp\u003e200G leaf\/spine in AI and storage fabrics, 100G server aggregation with breakouts, and EVPN-VXLAN overlays in racks wired for reverse airflow.\u003c\/p\u003e\n\u003ch3\u003eWhat is included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSwitch chassis with both power supplies\u003c\/li\u003e\n\u003cli\u003eFan units (C2P)\u003c\/li\u003e\n\u003cli\u003eRail kit\u003c\/li\u003e\n\u003cli\u003eCondition report and bench-test notes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eQSFP56 optics and cables\u003c\/li\u003e\n\u003cli\u003eOptional NOS licences beyond the shipped image\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMSN3700-VS2R in the lineup\u003c\/h3\u003e\u003cp\u003eThe SN3700 is the 200G workhorse of the Spectrum-2 line: same 1U footprint as the SN2700 but double the port speed. Take the SN3700C variant instead when every downlink is 100GbE and you want to avoid paying for 200G ports you cannot fill.\u003c\/p\u003e\n\u003ch3\u003eHow it compares with models we also stock\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eFabric\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003ePorts\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#fbfdff;font-weight:600;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eMSN3700-VS2R\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eEthernet 200G\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003e32 QSFP56\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003e200G leaf with reverse airflow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eMSN3700-VS2F\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eEthernet 200G\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003e32 QSFP56\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eSame switch, P2C airflow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eMSN3700-CS2F\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eEthernet 100G\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003e32 QSFP28\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003e100G-only leaf, P2C airflow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eMSN3800-CS2RO\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eEthernet 100G\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003e64 QSFP28\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eHigher port count, 2U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhy buy this switch from Zhongxin Data\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBench-tested on our own in-house test line — ports, fans and power supplies are checked before the unit leaves.\u003c\/li\u003e\n\u003cli\u003eWe quote only what we can physically confirm: the exact part number, airflow direction and condition notes come from the unit in front of us.\u003c\/li\u003e\n\u003cli\u003eUsed enterprise switches at secondary-market pricing, with a 90-day warranty from delivery.\u003c\/li\u003e\n\u003cli\u003eWorldwide shipping from Hong Kong, China; consolidation with servers, NICs and optics from the same rack is routine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRequest a quote\u003c\/h3\u003e\u003cp\u003eSend the part number \u003cstrong\u003eMSN3700-VS2R\u003c\/strong\u003e, the quantity you need and your destination to WhatsApp \u003ca href=\"https:\/\/wa.me\/8613068616914\"\u003e+86 13068616914\u003c\/a\u003e (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.\u003c\/p\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eIs the SN3700 32 ports of 200G or 36 ports of 100G?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003e32 ports of 200GbE QSFP56. Port counts of 36 belong to the older SB7700 EDR InfiniBand switch, which is a different platform.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat does VS2R mean?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eV for 200GbE, S2 for the standard-depth 1U chassis, R for connector-to-power (back-to-front) airflow.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhich NOS is installed?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eOnyx. The Cumulus Linux build is VS2FC and the ONIE-only build is VS2FO if you prefer to install your own image.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eCan it run 100G servers?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. Break each 200GbE port into 2 × 100GbE or 4 × 50GbE with the right cables, giving up to 64 × 100GbE downlinks from one switch.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes it support RoCEv2 lossless traffic?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes — PFC, ECN and shared buffer tuning support RoCEv2 for storage and distributed training.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eIs this an InfiniBand switch?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eNo. The SN3700 is Ethernet. Native InfiniBand at 200G is the Quantum QM8700, and 400G is QM9700\/QM9790.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat warranty do you provide?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003e90-day warranty from delivery, on a unit cleaned, re-flashed and bench-tested in-house.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong, China.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"font-size:13px;color:#666;\"\u003e\u003cem\u003eProduct 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.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":68061208445220,"sku":"MSN3700-VS2R","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/ee370822af55c6588d0ca0b5378518c7.jpg?v=1793951619","url":"https:\/\/zhongxindata.hk\/products\/mellanox-sn3700-vs2r-200gbe-32-port-qsfp56-switch-used","provider":"Zhongxin Data","version":"1.0","type":"link"}