{"product_id":"msn2700-cs2ros-nvidia-mellanox-sn2700-32-port-100gbe-qsfp28-switch-onie-refurbished","title":"NVIDIA Mellanox MSN2700-CS2ROS SN2700 32x 100GbE QSFP28 Spectrum Switch — ONIE, C2P Airflow, Refurbished","description":"\u003cp\u003e\u003cstrong\u003eONIE build with C2P airflow — bring your own network OS, ports on the cold aisle\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNVIDIA Mellanox MSN2700-CS2ROS — Spectrum SN2700, 32x 100GbE QSFP28, 1U\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"border-left: 3px solid #1e8f5e; background: #f7f8fa; padding: 10px 14px; margin: 14px 0;\"\u003e→ \u003cstrong\u003eCheck airflow first.\u003c\/strong\u003e C2P means air enters at the port (connector) side and leaves at the power-supply side. If your rack has the PSU side on the cold aisle, you need a P2C unit such as the MSN2700-CS2F instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e MSN2700-CS2ROS\u003cbr\u003e\u003cstrong\u003ePlatform:\u003c\/strong\u003e NVIDIA Spectrum SN2700\u003cbr\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e 1U Open Ethernet switch, 32 QSFP28 100GbE ports, ONIE (no pre-installed network OS), 2 hot-swap AC PSUs, C2P airflow\u003c\/p\u003e\n\u003cp\u003eThe MSN2700-CS2ROS ships with \u003cstrong\u003eONIE\u003c\/strong\u003e (Open Network Install Environment) instead of a pre-installed network OS, so you load the NOS your fabric already runs. It is the right unit when you are standardizing on an open NOS and your racks pull cold air in at the port side.\u003c\/p\u003e\n\u003cp\u003eEvery port runs 10 to 100GbE, so one SN2700 can serve as a 100G spine or a 25G top-of-rack switch with breakout cables. The CS2ROS suffix is a C2P ONIE variant that does not appear on NVIDIA's public ordering list; NVIDIA's closest listed part is the MSN2700-CS2RO (ONIE, C2P).\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhich One Do I Need?\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003cth\u003eNetwork OS (as ordered)\u003c\/th\u003e\n\u003cth\u003eAirflow\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMSN2700-CS2F\u003c\/td\u003e\n\u003ctd\u003eNVIDIA Onyx\u003c\/td\u003e\n\u003ctd\u003eP2C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMSN2700-CS2R\u003c\/td\u003e\n\u003ctd\u003eNVIDIA Onyx\u003c\/td\u003e\n\u003ctd\u003eC2P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMSN2700-CS2FC\u003c\/td\u003e\n\u003ctd\u003eCumulus Linux\u003c\/td\u003e\n\u003ctd\u003eP2C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMSN2700-CS2RC\u003c\/td\u003e\n\u003ctd\u003eCumulus Linux\u003c\/td\u003e\n\u003ctd\u003eC2P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMSN2700-CS2FO\u003c\/td\u003e\n\u003ctd\u003eONIE (no network OS)\u003c\/td\u003e\n\u003ctd\u003eP2C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMSN2700-CS2RO\u003c\/td\u003e\n\u003ctd\u003eONIE (no network OS)\u003c\/td\u003e\n\u003ctd\u003eC2P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003eMSN2700-CS2ROS\u003c\/strong\u003e — this listing\u003c\/td\u003e\n\u003ctd\u003eONIE (no network OS)\u003c\/td\u003e\n\u003ctd\u003eC2P — a CS2RO variant not on NVIDIA's public ordering list\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eThe suffix is the order, not the hardware.\u003c\/strong\u003e Airflow is set by the fan and PSU modules; the network OS is software. Match airflow to your hot and cold aisles before anything else.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eMSN2700-CS2ROS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlatform\u003c\/td\u003e\n\u003ctd\u003eNVIDIA Spectrum SN2700, 1U, standard depth, 19\" rack mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003e32x QSFP28, 10\/25\/40\/50\/56\/100GbE per port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax ports by speed\u003c\/td\u003e\n\u003ctd\u003e32x 100GbE · 64x 50GbE · 32x 40GbE · 64x 25GbE · 64x 10GbE (with splitter cables)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThroughput\u003c\/td\u003e\n\u003ctd\u003e6.4Tb\/s switching capacity (3.2Tb\/s one direction)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePacket rate\u003c\/td\u003e\n\u003ctd\u003e4.76 Bpps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLatency\u003c\/td\u003e\n\u003ctd\u003e300ns, cut-through\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePacket buffer\u003c\/td\u003e\n\u003ctd\u003e16MB, fully shared\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCPU \/ memory\u003c\/td\u003e\n\u003ctd\u003eIntel x86 dual-core 1.40GHz · 8GB DDR3 · 16GB or 32GB SSD depending on switch revision\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supplies\u003c\/td\u003e\n\u003ctd\u003e2x hot-swap AC, 1+1 redundant · 130W typical with passive cables (ATIS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFans\u003c\/td\u003e\n\u003ctd\u003e4x hot-swap, N+1 redundant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork OS (as ordered)\u003c\/td\u003e\n\u003ctd\u003eONIE — install the NOS of your choice\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAirflow\u003c\/td\u003e\n\u003ctd\u003eC2P (connector-to-power): air in at the ports, out at the PSU side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e43.8 x 427.83 x 686.8mm (1.72 x 16.84 x 27in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e11.1kg with 2 PSUs (24.5lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLifecycle\u003c\/td\u003e\n\u003ctd\u003eNVIDIA lists this switch family as End of Life (EOL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eRefurbished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLifetime, backed by Resilient Tec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eSource: NVIDIA Spectrum SN2000 hardware user manual (\u003ca href=\"https:\/\/networking-docs.nvidia.com\/sn2000hw\/latest\/specifications\" target=\"_blank\" rel=\"noopener\"\u003especifications\u003c\/a\u003e, \u003ca href=\"https:\/\/networking-docs.nvidia.com\/sn2000hw\/latest\/ordering-information\" target=\"_blank\" rel=\"noopener\"\u003eordering information\u003c\/a\u003e) and the \u003ca href=\"https:\/\/www.nvidia.cn\/content\/dam\/en-zz\/Solutions\/networking\/br-sn2000-series.pdf\" target=\"_blank\" rel=\"noopener\"\u003eNVIDIA SN2000 series datasheet\u003c\/a\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eNote on Throughput: 3.2Tb\/s or 6.4Tb\/s?\u003c\/h2\u003e\n\u003cp\u003eNVIDIA's datasheet quotes 3.2Tb\/s and its hardware manual quotes 6.4Tb\/s for the same switch. Both are right: 32 ports x 100GbE is 3.2Tb\/s in one direction and 6.4Tb\/s counting both directions. The switch is non-blocking either way.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eGood to Know\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirflow must match the rack.\u003c\/strong\u003e P2C (power-to-connector) pulls air in at the power-supply side and exhausts at the ports; C2P is the reverse. NVIDIA color-codes the PSU and fan modules by airflow direction, so check them against the part number.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4x25G breakouts cost a port.\u003c\/strong\u003e Per NVIDIA's manual, splitting a QSFP28 port into four 25GbE links disables (unmaps) the port directly below it. 2x50G splits do not. Plan cabling before you count ports.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40GbE look-alikes.\u003c\/strong\u003e Part numbers with B in place of C (for example MSN2700-BS2F) are the 40GbE version, not this 100GbE switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame hardware, different OS as ordered.\u003c\/strong\u003e Every 100GbE SN2700 in the table above is the same Spectrum hardware; the suffix records the OS it shipped with and the airflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEOL platform.\u003c\/strong\u003e NVIDIA no longer sells new SN2000 systems. That is why refurbished units are the practical way to expand or spare an existing SN2700 fabric.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eONIE means no OS out of the box.\u003c\/strong\u003e Plan to install your NOS image before the switch passes traffic. Tell us which NOS you run and we will confirm it lists the SN2700 before you order.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eQuick Checklist — Is This the Right Switch?\u003c\/h2\u003e\n\u003cp\u003eYou need 32 ports of 100GbE QSFP28 in 1U. Your rack draws cold air in at the \u003cstrong\u003eport side\u003c\/strong\u003e (C2P). You plan to install your own network OS through ONIE. You want dual hot-swap power supplies and hot-swap fans.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eAvailability\u003c\/h2\u003e\n\u003cp style=\"border-left: 3px solid #1e8f5e; background: #f7f8fa; padding: 10px 14px; margin: 14px 0;\"\u003e\u003cstrong\u003eRefurbished and shipped from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.\u003c\/strong\u003e\u003cbr\u003eNeed more than one, or a P2C unit for the other side of the row? Tell us how many ports you are building and we will quote switches and cabling together. \u003ca href=\"\/pages\/request-a-quote\"\u003e\u003cstrong\u003eRequest a quote →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e lifetime, \u003ca href=\"\/pages\/lifetime-warranty\"\u003ebacked by Resilient Tec\u003c\/a\u003e — not a manufacturer term. On switches that means advance replacement when we have one in stock, otherwise repair or replacement with an equivalent unit, from a named seller in the US.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eYou Might Also Need\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mcp1600-c001-mellanox-compatible-100g-qsfp28-passive-dac-cable-1m\"\u003eMCP1600-C001 100G QSFP28 passive DAC, 1 m\u003c\/a\u003e — switch-to-server or switch-to-switch inside the rack\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/100g-qsfp28-passive-dac-3m-reach-download-mellanox-compatibility-report-with-detailed-specifications\"\u003eMCP1600-C003 100G QSFP28 passive DAC, 3 m\u003c\/a\u003e — the next rack over\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mcp7f00-a002r30n-new-nvidia-100gbe-qsfp28-to-4x25gbe-sfp28-passive-breakout-dac-cable-2m\"\u003eNVIDIA MCP7F00-A002R30N 100G to 4x25G breakout DAC, 2 m\u003c\/a\u003e — one QSFP28 port to four 25GbE server links\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/100g-qsfp28-sr4-transceiver-850nm-100m-mpo-mellanox-compatible-mma1b00-c100d\"\u003eMMA1B00-C100D 100G QSFP28 SR4 transceiver\u003c\/a\u003e and \u003ca href=\"\/products\/mfa1a00-c003-mellanox-compatible-100g-qsfp28-active-optical-cable-3m\"\u003eMFA1A00-C003 100G AOC\u003c\/a\u003e — for runs past passive copper\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/product-guides\"\u003eProduct guides\u003c\/a\u003e — structured cabling, switches and the rest of the rack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eRelated Guides\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/news\/mellanox-sn2100-sn2700-port-split-25g-50g-breakout\"\u003ePort Splitting on Mellanox SN2100, SN2700 and SN2410: 4x25G and 2x50G Breakouts Without Losing a Port\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/news\/qsfp28-breakout-cables-100g-to-4x25g-vs-4x10g-guide\"\u003eQSFP28 Breakout Cables: 100G to 4x25G vs 4x10G Guide\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/news\/dac-cable-no-link-fix-25g-100g-fec-mismatches-2026-guide\"\u003eDAC Cable No Link? Fix 25G\/100G FEC Mismatches (2026 Guide)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/news\/100g-qsfp28-dac-cables-for-ai-homelab-clusters-the-connectx-cable-guide-2026\"\u003e100G QSFP28 DAC Cables for AI Homelab Clusters: The ConnectX Cable Guide (2026)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/network-switches-guide\"\u003eNetwork Switches Guide\u003c\/a\u003e\u003c\/p\u003e","brand":"NVIDIA","offers":[{"title":"Default Title","offer_id":68123350794340,"sku":"MSN2700-CS2ROS-R","price":4990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/3482\/4548\/files\/MSN2700-CS2ROS_1.jpg?v=1794407826","url":"https:\/\/resilient-tec.com\/products\/msn2700-cs2ros-nvidia-mellanox-sn2700-32-port-100gbe-qsfp28-switch-onie-refurbished","provider":"Resilient Tec","version":"1.0","type":"link"}