NVIDIA Mellanox MSN2700-CS2F SN2700 32x 100GbE QSFP28 Spectrum Switch — Onyx, P2C Airflow, Refurbished
Warranty: Lifetime
The Onyx build with P2C airflow — the most common SN2700 in existing fabrics
NVIDIA Mellanox MSN2700-CS2F / 920-9N101-00F7-0X4 — Spectrum SN2700, 32x 100GbE QSFP28, 1U
→ Check airflow first. P2C means air enters at the power-supply side and exhausts at the ports. If your rack pulls cold air in at the port side, you need a C2P unit such as the MSN2700-CS2ROS instead.
Mellanox Part Number: MSN2700-CS2F
NVIDIA SKU: 920-9N101-00F7-0X4
Description: 1U Open Ethernet switch with NVIDIA Onyx (MLNX-OS), 32 QSFP28 100GbE ports, 2 AC PSUs, x86 CPU, standard depth, P2C airflow, rail kit
The MSN2700-CS2F is the SN2700 NVIDIA sold with its own Onyx (formerly MLNX-OS) network OS and P2C airflow. If you are adding to or sparing an Onyx-based SN2700 fabric, this is the like-for-like part.
Every port runs 10 to 100GbE, so the same switch works as a 100G spine or, with breakout cables, a 25G top-of-rack switch for up to 64 servers.
Which One Do I Need?
| Part number | Network OS (as ordered) | Airflow |
|---|---|---|
| MSN2700-CS2F — this listing | NVIDIA Onyx | P2C |
| MSN2700-CS2R | NVIDIA Onyx | C2P |
| MSN2700-CS2FC | Cumulus Linux | P2C |
| MSN2700-CS2RC | Cumulus Linux | C2P |
| MSN2700-CS2FO | ONIE (no network OS) | P2C |
| MSN2700-CS2RO | ONIE (no network OS) | C2P |
| MSN2700-CS2ROS | ONIE (no network OS) | C2P — a CS2RO variant not on NVIDIA's public ordering list |
The suffix is the order, not the hardware. 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.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | MSN2700-CS2F |
| NVIDIA SKU | 920-9N101-00F7-0X4 |
| Platform | NVIDIA Spectrum SN2700, 1U, standard depth, 19" rack mount |
| Ports | 32x QSFP28, 10/25/40/50/56/100GbE per port |
| Max ports by speed | 32x 100GbE · 64x 50GbE · 32x 40GbE · 64x 25GbE · 64x 10GbE (with splitter cables) |
| Throughput | 6.4Tb/s switching capacity (3.2Tb/s one direction) |
| Packet rate | 4.76 Bpps |
| Latency | 300ns, cut-through |
| Packet buffer | 16MB, fully shared |
| CPU / memory | Intel x86 dual-core 1.40GHz · 8GB DDR3 · 16GB or 32GB SSD depending on switch revision |
| Power supplies | 2x hot-swap AC, 1+1 redundant · 130W typical with passive cables (ATIS) |
| Fans | 4x hot-swap, N+1 redundant |
| Network OS (as ordered) | NVIDIA Onyx (formerly MLNX-OS) |
| Airflow | P2C (power-to-connector): air in at the PSU side, out at the ports |
| Dimensions | 43.8 x 427.83 x 686.8mm (1.72 x 16.84 x 27in) |
| Weight | 11.1kg with 2 PSUs (24.5lb) |
| Operating temperature | 0 to 40°C |
| Lifecycle | NVIDIA lists this switch family as End of Life (EOL) |
| Condition | Refurbished |
| Warranty | Lifetime, backed by Resilient Tec |
Source: NVIDIA Spectrum SN2000 hardware user manual (specifications, ordering information) and the NVIDIA SN2000 series datasheet.
Note on Throughput: 3.2Tb/s or 6.4Tb/s?
NVIDIA'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.
Good to Know
- Airflow must match the rack. 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.
- 4x25G breakouts cost a port. 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.
- 40GbE look-alikes. Part numbers with B in place of C (for example MSN2700-BS2F) are the 40GbE version, not this 100GbE switch.
- Same hardware, different OS as ordered. Every 100GbE SN2700 in the table above is the same Spectrum hardware; the suffix records the OS it shipped with and the airflow.
- EOL platform. NVIDIA no longer sells new SN2000 systems. That is why refurbished units are the practical way to expand or spare an existing SN2700 fabric.
Quick Checklist — Is This the Right Switch?
You need 32 ports of 100GbE QSFP28 in 1U. Your rack has the power-supply side on the cold aisle (P2C). You run, or are matching, an Onyx-based SN2700 fabric. You want dual hot-swap power supplies and hot-swap fans.
Availability
Refurbished and shipped from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.
Need more than one, or a C2P unit for the other side of the row? Tell us how many ports you are building and we will quote switches and cabling together. Request a quote →
Warranty: lifetime, backed by Resilient Tec — 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.
You Might Also Need
- MCP1600-C001 100G QSFP28 passive DAC, 1 m — switch-to-server or switch-to-switch inside the rack
- MCP1600-C003 100G QSFP28 passive DAC, 3 m — the next rack over
- NVIDIA MCP7F00-A002R30N 100G to 4x25G breakout DAC, 2 m — one QSFP28 port to four 25GbE server links
- MMA1B00-C100D 100G QSFP28 SR4 transceiver and MFA1A00-C003 100G AOC — for runs past passive copper
- Product guides — structured cabling, switches and the rest of the rack
Related Guides
QSFP28 Breakout Cables: 100G to 4x25G vs 4x10G Guide
DAC Cable No Link? Fix 25G/100G FEC Mismatches (2026 Guide)
100G QSFP28 DAC Cables for AI Homelab Clusters: The ConnectX Cable Guide (2026)
The Onyx build with P2C airflow — the most common SN2700 in existing fabrics
NVIDIA Mellanox MSN2700-CS2F / 920-9N101-00F7-0X4 — Spectrum SN2700, 32x 100GbE QSFP28, 1U
→ Check airflow first. P2C means air enters at the power-supply side and exhausts at the ports. If your rack pulls cold air in at the port side, you need a C2P unit such as the MSN2700-CS2ROS instead.
Mellanox Part Number: MSN2700-CS2F
NVIDIA SKU: 920-9N101-00F7-0X4
Description: 1U Open Ethernet switch with NVIDIA Onyx (MLNX-OS), 32 QSFP28 100GbE ports, 2 AC PSUs, x86 CPU, standard depth, P2C airflow, rail kit
The MSN2700-CS2F is the SN2700 NVIDIA sold with its own Onyx (formerly MLNX-OS) network OS and P2C airflow. If you are adding to or sparing an Onyx-based SN2700 fabric, this is the like-for-like part.
Every port runs 10 to 100GbE, so the same switch works as a 100G spine or, with breakout cables, a 25G top-of-rack switch for up to 64 servers.
Which One Do I Need?
| Part number | Network OS (as ordered) | Airflow |
|---|---|---|
| MSN2700-CS2F — this listing | NVIDIA Onyx | P2C |
| MSN2700-CS2R | NVIDIA Onyx | C2P |
| MSN2700-CS2FC | Cumulus Linux | P2C |
| MSN2700-CS2RC | Cumulus Linux | C2P |
| MSN2700-CS2FO | ONIE (no network OS) | P2C |
| MSN2700-CS2RO | ONIE (no network OS) | C2P |
| MSN2700-CS2ROS | ONIE (no network OS) | C2P — a CS2RO variant not on NVIDIA's public ordering list |
The suffix is the order, not the hardware. 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.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | MSN2700-CS2F |
| NVIDIA SKU | 920-9N101-00F7-0X4 |
| Platform | NVIDIA Spectrum SN2700, 1U, standard depth, 19" rack mount |
| Ports | 32x QSFP28, 10/25/40/50/56/100GbE per port |
| Max ports by speed | 32x 100GbE · 64x 50GbE · 32x 40GbE · 64x 25GbE · 64x 10GbE (with splitter cables) |
| Throughput | 6.4Tb/s switching capacity (3.2Tb/s one direction) |
| Packet rate | 4.76 Bpps |
| Latency | 300ns, cut-through |
| Packet buffer | 16MB, fully shared |
| CPU / memory | Intel x86 dual-core 1.40GHz · 8GB DDR3 · 16GB or 32GB SSD depending on switch revision |
| Power supplies | 2x hot-swap AC, 1+1 redundant · 130W typical with passive cables (ATIS) |
| Fans | 4x hot-swap, N+1 redundant |
| Network OS (as ordered) | NVIDIA Onyx (formerly MLNX-OS) |
| Airflow | P2C (power-to-connector): air in at the PSU side, out at the ports |
| Dimensions | 43.8 x 427.83 x 686.8mm (1.72 x 16.84 x 27in) |
| Weight | 11.1kg with 2 PSUs (24.5lb) |
| Operating temperature | 0 to 40°C |
| Lifecycle | NVIDIA lists this switch family as End of Life (EOL) |
| Condition | Refurbished |
| Warranty | Lifetime, backed by Resilient Tec |
Source: NVIDIA Spectrum SN2000 hardware user manual (specifications, ordering information) and the NVIDIA SN2000 series datasheet.
Note on Throughput: 3.2Tb/s or 6.4Tb/s?
NVIDIA'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.
Good to Know
- Airflow must match the rack. 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.
- 4x25G breakouts cost a port. 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.
- 40GbE look-alikes. Part numbers with B in place of C (for example MSN2700-BS2F) are the 40GbE version, not this 100GbE switch.
- Same hardware, different OS as ordered. Every 100GbE SN2700 in the table above is the same Spectrum hardware; the suffix records the OS it shipped with and the airflow.
- EOL platform. NVIDIA no longer sells new SN2000 systems. That is why refurbished units are the practical way to expand or spare an existing SN2700 fabric.
Quick Checklist — Is This the Right Switch?
You need 32 ports of 100GbE QSFP28 in 1U. Your rack has the power-supply side on the cold aisle (P2C). You run, or are matching, an Onyx-based SN2700 fabric. You want dual hot-swap power supplies and hot-swap fans.
Availability
Refurbished and shipped from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.
Need more than one, or a C2P unit for the other side of the row? Tell us how many ports you are building and we will quote switches and cabling together. Request a quote →
Warranty: lifetime, backed by Resilient Tec — 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.
You Might Also Need
- MCP1600-C001 100G QSFP28 passive DAC, 1 m — switch-to-server or switch-to-switch inside the rack
- MCP1600-C003 100G QSFP28 passive DAC, 3 m — the next rack over
- NVIDIA MCP7F00-A002R30N 100G to 4x25G breakout DAC, 2 m — one QSFP28 port to four 25GbE server links
- MMA1B00-C100D 100G QSFP28 SR4 transceiver and MFA1A00-C003 100G AOC — for runs past passive copper
- Product guides — structured cabling, switches and the rest of the rack
Related Guides
QSFP28 Breakout Cables: 100G to 4x25G vs 4x10G Guide
DAC Cable No Link? Fix 25G/100G FEC Mismatches (2026 Guide)
100G QSFP28 DAC Cables for AI Homelab Clusters: The ConnectX Cable Guide (2026)