Switch Series & Supported Models
Browse common switch series and models supported for each brand.
NVIDIA/Mellanox MSN3420-CB2FC Mellanox Spectrum-2 Based 25GbE/100GbE 1U Open Ethernet Switch with Cumulus Linux, 48 SFP28 Ports and 12 QSFP28 Ports, 2 Power Supplies (AC), Standard Depth, P2C Airflow, Rail Kit
P/N: MSN3420-CB2FC SKU: 10502
US$15,999.00
Switch Types:
- MSN3420-CB2F 48x 25GE SFP28 + 12x 100GE QSFP28,P2C,Onyx
- MSN3420-CB2FC 48x 25GE SFP28 + 12x 100GE QSFP28,P2C,Cumulus
- MSN3700-VS2F 32x 200GE QSFP56,P2C,Onyx
- MSN3700-VS2FC 32x 200GE QSFP56,P2C,Cumulus
- MSN3700-CS2F 32x 100GE QSFP28,P2C,Onyx
- MSN3700-CS2FC 32x 100GE QSFP28,P2C,Cumulus
Quantity:
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30-day return and refund
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3-year warranty
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Available for delivery within 2 days
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Free shipping for orders over
Products Highlight
- 48×25GbE ToR, 12×100GbE Spine
- 4.8Tb/s Non-Blocking Switching Fabric
- 3.58Bpps Wire-Speed Packet Forwarding
- Flexible QSFP28 4×25G Breakout
- Cumulus Linux EVPN-VXLAN Fabric Automation
- RoCEv2-Ready Lossless Ethernet Fabric
Specifications
| Part Number | MSN3420-CB2FC | Switch ASIC | NVIDIA Spectrum-2 |
|---|---|---|---|
| Form Factor | 1U | Switching Capacity | 4.8Tbps |
| Ports | 48 x SFP28 + 12 x QSFP28 | Port Speed | 25GE / 100GE |
| Software | NVIDIA Cumulus Linux | Airflow | Power-to-Connector (P2C) |
| Cooling Mechanism | Air Cooled | Input Voltage | 100–127VAC, 50/60Hz, 6A / 200–240VAC, 50/60Hz, 3A |
| Dimensions (H × W × D) | 44 × 438 × 464.6mm | Warranty | 1-Year / 3-Year / 5-Year Support Options Available |
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FAQ
Ask a QuestionFind answers to common questions about our products.
Our servers have dual 25GbE NICs connected to two SN3420 switches. Should we use MLAG or EVPN Multihoming?
MLAG is often the more direct choice for a pair of ToR switches that need active-active server connectivity and link aggregation; the server typically uses an LACP bond. EVPN Multihoming is generally a stronger long-term option for Clos and BGP EVPN fabrics, especially where reducing peer-link dependence is important.
Can this switch be installed in a remote rack and provisioned centrally without sending an engineer on site?
Yes, provided that an out-of-band DHCP-enabled management network is prepared in advance. The Cumulus Linux management interface can obtain an address through DHCP and can use ZTP to retrieve and run an initialization script. For repeatable deployments, hostname, management addressing, uplink BGP, VLANs, monitoring, and access-control settings can be preconfigured in the provisioning workflow.
Can the same SN3420 carry RoCE storage traffic, VM traffic, and backup traffic?
Yes, but the entire network should not be configured as lossless. RoCE traffic should be classified into a dedicated priority and designed end to end with ECN, PFC, and buffer policies. VM, backup, and management traffic normally remain best-effort. Validate PFC counters, ECN marking, congestion behavior, and real application throughput before production use.
Can I directly import the configuration from an existing Onyx-based switch into this Cumulus Linux model?
Direct import is not recommended. Onyx and Cumulus Linux use different CLI syntax, configuration structures, and automation models. Recreate the intended network behavior for VLANs, LAG/MLAG, VRFs, BGP, ACLs, and QoS, then validate routing, MAC learning, link aggregation, and failover in a lab before migration.
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