{"product_id":"mellanox-sn3700-cs2f-100gbe-32-port-qsfp28-switch-used","title":"Mellanox SN3700-CS2F 100GbE 32-Port QSFP28 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 SN3700C MSN3700-CS2F used, bench-tested. NVIDIA Spectrum-2 SN3700C with 32 QSFP28 ports at 100GbE, 3.2 Tb\/s switching capacity (32 × 100GbE, non-blocking), 425 ns latency, 42 MB buffer, 1U and P2C 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-CS2F 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-CS2F) 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 SN3700C\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Spectrum-2 SN3700C (CS2F)\u003c\/strong\u003e is the 100GbE build of the SN3700 chassis: 32 QSFP28 ports, 3.2 Tb\/s switching capacity (32 × 100GbE, non-blocking), 4.76 Bpps, 425 ns latency and a 42 MB shared buffer. It keeps the deeper buffer and newer ASIC of Spectrum-2 while pricing every port at 100G — the sensible fit when your servers are 25G or 100G and nothing on the rack needs 200G.\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-CS2F\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 SN3700C\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 × 100GbE QSFP28\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePort speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100GbE per port (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\u003eQSFP28 (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\u003e3.2 Tb\/s switching capacity (32 × 100GbE, 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\u003eP2C — power-to-connector (front-to-back)\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), 4 × 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 dual-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 × 100GbE QSFP28 ports\u003c\/li\u003e\n\u003cli\u003e3.2 Tb\/s switching capacity (32 × 100GbE, non-blocking), 4.76 Bpps\u003c\/li\u003e\n\u003cli\u003e425 ns latency, 42 MB shared buffer\u003c\/li\u003e\n\u003cli\u003eBreakout to 4 × 25GbE or 2 × 50GbE per port\u003c\/li\u003e\n\u003cli\u003eRoCEv2 with PFC\/ECN\u003c\/li\u003e\n\u003cli\u003eVXLAN, EVPN, MLAG support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical deployments\u003c\/h3\u003e\u003cp\u003e100G leaf and spine layers, 25G server aggregation, storage fabrics, and EVPN-VXLAN overlays in standard front-to-back racks.\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 (P2C)\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\u003eQSFP28 optics and cables\u003c\/li\u003e\n\u003cli\u003eAdditional NOS licences\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMSN3700-CS2F in the lineup\u003c\/h3\u003e\u003cp\u003eThe C in CS2F is the 100GbE port class, not a different chassis: SN3700C and SN3700 share the 1U body and 42 MB buffer, so the choice is port speed against cost per port. If any part of the rack is moving to 200G, buy VS2F\/VS2R instead and run 100G through breakouts.\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-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 leaf, P2C 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;\"\u003e200G leaf, 100G via breakout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #dee2e6;\"\u003eMSN2700-CS2ROS\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;\"\u003eLower-cost 100G with ONIE\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;\"\u003eDouble the ports, 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-CS2F\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 SN3700-CS2F the same as SN3700C?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. SN3700C is the model name for the 100GbE ports of the SN3700 chassis; MSN3700-CS2F is the ordering part number.\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;\"\u003eHow many ports and at what speed?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003e32 QSFP28 ports at 100GbE, and each port breaks out to 4 × 25GbE or 2 × 50GbE.\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 CS2F mean?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eC for 100GbE ports, S2 for the standard-depth 1U chassis, F for power-to-connector 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 ships with it?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eOnyx. The Cumulus Linux build is CS2FC and the ONIE build is CS2FO.\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 200G possible on this unit?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eNo. 200G needs the VS2F\/VS2R build with QSFP56 ports. Here the ceiling is 100GbE per port.\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 do RoCEv2?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes, with PFC and ECN enabled, and the 42 MB buffer absorbs bursts better than the older 12 MB design.\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 is the warranty?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003e90-day warranty from delivery.\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":68061210018084,"sku":"MSN3700-CS2F","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/ef278ee865a83b762b825ff015eba2a5_6bc3f3d4-b5dc-42f8-ab9f-734d650de79a.jpg?v=1793948450","url":"https:\/\/zhongxindata.hk\/products\/mellanox-sn3700-cs2f-100gbe-32-port-qsfp28-switch-used","provider":"Zhongxin Data","version":"1.0","type":"link"}