MSN3420-CB2RC Overview
The NVIDIA Spectrum SN3420 is a 1U open Ethernet switch featuring 48×25GbE SFP28 ports and 12×100GbE QSFP28 ports, delivering up to 2.4Tbps switching capacity. Designed to evolve host connectivity from 10G to 25G and enable high-performance leaf-spine topologies, it supports flexible breakout options and provides 3.58 billion packets per second processing capacity. The SN3420 offers precision timing and compatibility with multiple operating systems, including Cumulus Linux and SONiC, making it an ideal choice for modern data centers.
Key Features
- Visibility: NVIDIA What Just Happened® (WJH) telemetry reduces mean time to issue resolution by answering When, What, Who, Where, and Why.
- Hardware-accelerated histograms for submicrosecond queue depth monitoring.
- Inband Network Telemetry (INT)-ready hardware and streaming telemetry.
- 512,000 on-chip flow counters.
- Agility: Comprehensive Layer 2, Layer 3, and RoCE support.
- Advanced network virtualization with high-performance single-pass VXLAN routing and IPv6 segment routing.
- Cloud-scale network address translation (NAT) supporting 100,000+ sessions.
- Programmable pipeline for packet parsing, processing, and editing.
- Deep packet inspection with 512 billion deep capacity.
- Performance: Fully shared packet buffer for predictable high bandwidth.
- Consistent low cut-through latency (425ns).
- Robust RDMA over Converged Ethernet (RoCE) for NVMe over Fabrics and GPUDirect applications.
- Best-in-class VXLAN scale with 10X more tunnels and endpoints than competitors.
- 512,000 forwarding entries flexibly shared across ACLs, LPM routes, host routes, MAC, ECMP, and tunnels.
Use Cases
- Top-of-rack (ToR) switch in leaf-spine CLOS fabrics.
- High-speed host connectivity migration from 10G to 25G.
- Enterprise aggregation and cloud fabric.
- Cumulus Linux, SONiC, and open NOS deployments.
Technical Specifications
- Connectors: 48 × SFP28 (25GbE) + 12 × QSFP28 (100GbE)
- Max. 100GbE ports: 12
- Max. 50GbE ports: 24
- Max. 40GbE ports: 12
- Max. 25GbE ports: 48 + 48 (via breakout)
- Max. 10GbE ports: 48 + 48 (via breakout)
- Switching capacity: 2.4 Tbps
- Wire-speed switching: 3.58 Bpps
- Lanes per port x max speed/lane: 4 × 25G NRZ
- Latency: 425 ns (cut-through mode)
- CPU: Dual-core x86
- System memory: 8 GB
- SSD memory: 32 GB
- Packet buffer: 42 MB
- Management ports: 1 × 100/1000Mb RJ45
- Serial ports: 1 × RJ45
- USB ports: 1
- Hot-swap power supplies: 2 (1+1 redundant)
- Hot-swappable fans: 5 (N+1 redundant)
- Airflow options: Forward or reverse
- Power supplies: 50–60Hz, 100–264Vac, 2.9–4.5A
- Size: 1.72″H × 17.24″W × 18.29″D
- Weight: 8.5 kg (18.73 lbs)
Cooling & Power
- 1RU rackmount chassis
- 1+1 redundant, hot-swappable AC power supplies
- 5 redundant hot-swappable fans
- Available in forward or reverse airflow
- Max power draw: ~98W (with optics)
Environmental
- Operating temperature: 0°C to 40°C
- Humidity: 10% to 85% non-condensing
- Altitude: up to 3050m
- Noise level: 73.7 dB(A)
- MTBF: >150,000 hours
- Certifications: CE, FCC, VCCI, UL, RoHS
Ordering Information
- 920-9N213-00R7-0C0: MSN3420-CB2RC, 1U, 48x25GbE + 12x100GbE, Cumulus Linux, C2P airflow, Rail Kit