NVIDIA Mellanox MSN2100-CB2F SN2100 16x 100GbE QSFP28 Half-Width Spectrum Switch — Onyx, P2C Airflow, Refurbished
Warranty: Lifetime
Half-width, short-depth 100GbE — two fit side by side in one rack unit
NVIDIA Mellanox MSN2100-CB2F / 920-9N100-00F7-0X0 — Spectrum SN2100, 16x 100GbE QSFP28
→ Rails are not part of this SKU. NVIDIA sold the MSN2100-CB2F with the rail kit purchased separately. Tell us whether you are mounting one switch or two side by side and we will quote the right kit.
Mellanox Part Number: MSN2100-CB2F
NVIDIA SKU: 920-9N100-00F7-0X0
Description: 1U half-width Open Ethernet switch with NVIDIA Onyx (MLNX-OS), 16 QSFP28 100GbE ports, 2 AC PSUs, x86 CPU, short depth, P2C airflow, rail kit purchased separately
The SN2100 puts 16 ports of 100GbE in a half-width, 20-inch-deep chassis, so two switches can share one rack unit for a redundant pair. NVIDIA positions it for storage and hyperconverged racks where a full 32-port switch is more than the rack needs.
Each port runs 10 to 100GbE. With breakout cables one SN2100 can serve up to 64 25GbE or 10GbE hosts, or 32 50GbE hosts.
Which One Do I Need?
| If you need | Look at |
|---|---|
| 16x 100GbE, half width, Onyx, P2C airflow | MSN2100-CB2F — this listing |
| The same switch with C2P airflow | MSN2100-CB2R |
| The same switch with Cumulus Linux (P2C) | MSN2100-CB2FC |
| The same switch with ONIE (P2C) | MSN2100-CB2FO |
| 40GbE, not 100GbE | MSN2100-BB2F — a B in place of the C marks the 40GbE version |
| 32 ports in a full-width 1U, hot-swap PSUs and fans | SN2700 (MSN2700-CS2F or MSN2700-CS2ROS) |
F or R is airflow; a trailing C or O is the OS. F is P2C (air in at the power side, out at the ports), R is C2P. Match it to your hot and cold aisles before you order.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | MSN2100-CB2F |
| NVIDIA SKU | 920-9N100-00F7-0X0 |
| Platform | NVIDIA Spectrum SN2100, 1U half-width, short depth |
| Ports | 16x QSFP28, 10/25/40/50/56/100GbE per port |
| Max ports by speed | 16x 100GbE · 32x 50GbE · 16x 40GbE · 64x 25GbE · 64x 10GbE (with splitter cables) |
| Throughput | 3.2Tb/s switching capacity (1.6Tb/s one direction) |
| Packet rate | 2.38 Bpps |
| Latency | 300ns |
| Packet buffer | 16MB, fully shared |
| CPU / memory | Intel Atom x86 · 8GB DDR3L · 16GB M.2 SATA SSD |
| Power | 2x AC power supplies (fixed, not field-replaceable), 100–240VAC · 74W typical with passive cables (ATIS) |
| Fans | 4 (fixed, not field-replaceable) |
| Front-panel management | RJ45 management, RJ45 console, mini USB |
| 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 200 x 508mm (1.72 x 7.87 x 20in) |
| Weight | 4.54kg (10lb) |
| 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 Power and Fans: Redundant, Not Hot-Swap
The SN2100 has two built-in power supplies and four built-in fans. Unlike the SN2700, NVIDIA lists them as non-replaceable, so they cannot be hot-swapped in the field. A failed PSU or fan means swapping the switch, which our lifetime warranty covers.
Good to Know
- Management lives on the front. The SN2100 puts its management port, console and mini USB on the port side; the SN2700 puts them on the rear.
- Two per rack unit. NVIDIA designed the SN2100 so two switches sit side by side in a single 1U slot of a 19-inch rack, a compact way to give hosts a redundant pair.
- Airflow must match the rack. This is the P2C build. All SN2100s in a row should match the aisle layout.
- 40GbE look-alike. MSN2100-BB2F is one letter away and is the 40GbE model.
- EOL platform. NVIDIA no longer sells new SN2000 systems, so refurbished units are the practical way to expand or spare an SN2100 pair.
Quick Checklist — Is This the Right Switch?
You need 16 ports of 100GbE QSFP28 in a half-width, short-depth chassis. Your rack has the power-supply side on the cold aisle (P2C). You run, or are matching, Onyx. You are fine with built-in, non-hot-swap power and fans, and you will source a rail kit.
Availability
Refurbished and shipped from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.
Building a redundant pair? Tell us and we will quote two switches, the mounting kit and the 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)
Half-width, short-depth 100GbE — two fit side by side in one rack unit
NVIDIA Mellanox MSN2100-CB2F / 920-9N100-00F7-0X0 — Spectrum SN2100, 16x 100GbE QSFP28
→ Rails are not part of this SKU. NVIDIA sold the MSN2100-CB2F with the rail kit purchased separately. Tell us whether you are mounting one switch or two side by side and we will quote the right kit.
Mellanox Part Number: MSN2100-CB2F
NVIDIA SKU: 920-9N100-00F7-0X0
Description: 1U half-width Open Ethernet switch with NVIDIA Onyx (MLNX-OS), 16 QSFP28 100GbE ports, 2 AC PSUs, x86 CPU, short depth, P2C airflow, rail kit purchased separately
The SN2100 puts 16 ports of 100GbE in a half-width, 20-inch-deep chassis, so two switches can share one rack unit for a redundant pair. NVIDIA positions it for storage and hyperconverged racks where a full 32-port switch is more than the rack needs.
Each port runs 10 to 100GbE. With breakout cables one SN2100 can serve up to 64 25GbE or 10GbE hosts, or 32 50GbE hosts.
Which One Do I Need?
| If you need | Look at |
|---|---|
| 16x 100GbE, half width, Onyx, P2C airflow | MSN2100-CB2F — this listing |
| The same switch with C2P airflow | MSN2100-CB2R |
| The same switch with Cumulus Linux (P2C) | MSN2100-CB2FC |
| The same switch with ONIE (P2C) | MSN2100-CB2FO |
| 40GbE, not 100GbE | MSN2100-BB2F — a B in place of the C marks the 40GbE version |
| 32 ports in a full-width 1U, hot-swap PSUs and fans | SN2700 (MSN2700-CS2F or MSN2700-CS2ROS) |
F or R is airflow; a trailing C or O is the OS. F is P2C (air in at the power side, out at the ports), R is C2P. Match it to your hot and cold aisles before you order.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | MSN2100-CB2F |
| NVIDIA SKU | 920-9N100-00F7-0X0 |
| Platform | NVIDIA Spectrum SN2100, 1U half-width, short depth |
| Ports | 16x QSFP28, 10/25/40/50/56/100GbE per port |
| Max ports by speed | 16x 100GbE · 32x 50GbE · 16x 40GbE · 64x 25GbE · 64x 10GbE (with splitter cables) |
| Throughput | 3.2Tb/s switching capacity (1.6Tb/s one direction) |
| Packet rate | 2.38 Bpps |
| Latency | 300ns |
| Packet buffer | 16MB, fully shared |
| CPU / memory | Intel Atom x86 · 8GB DDR3L · 16GB M.2 SATA SSD |
| Power | 2x AC power supplies (fixed, not field-replaceable), 100–240VAC · 74W typical with passive cables (ATIS) |
| Fans | 4 (fixed, not field-replaceable) |
| Front-panel management | RJ45 management, RJ45 console, mini USB |
| 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 200 x 508mm (1.72 x 7.87 x 20in) |
| Weight | 4.54kg (10lb) |
| 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 Power and Fans: Redundant, Not Hot-Swap
The SN2100 has two built-in power supplies and four built-in fans. Unlike the SN2700, NVIDIA lists them as non-replaceable, so they cannot be hot-swapped in the field. A failed PSU or fan means swapping the switch, which our lifetime warranty covers.
Good to Know
- Management lives on the front. The SN2100 puts its management port, console and mini USB on the port side; the SN2700 puts them on the rear.
- Two per rack unit. NVIDIA designed the SN2100 so two switches sit side by side in a single 1U slot of a 19-inch rack, a compact way to give hosts a redundant pair.
- Airflow must match the rack. This is the P2C build. All SN2100s in a row should match the aisle layout.
- 40GbE look-alike. MSN2100-BB2F is one letter away and is the 40GbE model.
- EOL platform. NVIDIA no longer sells new SN2000 systems, so refurbished units are the practical way to expand or spare an SN2100 pair.
Quick Checklist — Is This the Right Switch?
You need 16 ports of 100GbE QSFP28 in a half-width, short-depth chassis. Your rack has the power-supply side on the cold aisle (P2C). You run, or are matching, Onyx. You are fine with built-in, non-hot-swap power and fans, and you will source a rail kit.
Availability
Refurbished and shipped from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.
Building a redundant pair? Tell us and we will quote two switches, the mounting kit and the 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)