NEW NVIDIA Mellanox MSN3420-CB2RC Spectrum-2 Switch, 48xSFP28/12xQSFP28/2xAC PSU

Overview

The MSN3420-CB2RC is an NVIDIA/Mellanox Spectrum-2 based open Ethernet switch designed for high-density leaf/spine and top-of-rack (ToR) data center deployments. Built on the Spectrum-2 ASIC, the platform delivers wire-speed Layer 2 and Layer 3 performance with ultra-low latency, large shared buffering, and support for modern software-defined networking environments. The CB2RC variant ships with NVIDIA Cumulus Linux and uses C2P (power-to-port) airflow, making it suitable for data centers using hot-aisle/cold-aisle containment strategies. The switch supports migration from 10GbE to 25GbE server access while providing high-speed 100GbE uplinks for scalable cloud, virtualization, storage, and hyperconverged infrastructure environments.

Specifications 

• Manufacturer: NVIDIA
• Model: MSN3420-CB2RC
• Product family: NVIDIA/Mellanox Spectrum SN3000 Series
• Switch ASIC:
  • Spectrum-2 ASIC
• Form factor:
  • 1RU rack-mount
• Switching capacity:
  • 4.8 Tbps
• Packet processing:
  • 3.58 Bpps
• Latency:
  • 425 ns (cut-through)
• Network interfaces:
  • 48 × SFP28 ports (10/25GbE)
  • 12 × QSFP28 ports (40/100GbE)
  • QSFP28 breakout support (4×10GbE or 4×25GbE)
• Layer support:
  • Layer 2 and Layer 3 managed switching
• Packet buffer:
  • 42 MB shared buffer
• CPU:
  • Dual-core x86 processor
• System memory:
  • 8 GB DDR4 RAM
• Storage:
  • 32 GB SSD
• Management interfaces:
  • 1 × RJ-45 Gigabit management port
  • 1 × RJ-45 serial console
  • 1 × USB port
• Software:
  • NVIDIA Cumulus Linux (pre-installed)
• Routing support:
  • BGP
  • OSPFv2
  • VRRP
  • Static IPv4 routing
• Management protocols:
  • SNMP v1/v2/v3
  • HTTP/HTTPS
  • CLI
  • SSH
  • TACACS+
  • RADIUS
  • LDAP
• Jumbo frame support:
  • Up to 9,216 bytes
• Power:
  • Dual hot-swappable AC power supplies
  • 1+1 redundancy
  • 100–264 VAC, 50/60 Hz
• Cooling:
  • C2P (power-to-port) airflow
  • Hot-swappable fan modules
• Dimensions (W × H × D):
  • 16.84 × 1.72 × 17 in
  • 428 × 44 × 432 mm
• Weight:
  • Approximately 18.7 lb (8.5 kg)
• Typical use cases:
  • Leaf/spine architectures
  • Top-of-rack switching
  • Cloud and web-scale data centers
  • Hyperconverged infrastructure
  • High-performance storage networks