• Cisco N3K-C3432D-S switch with 32x 400GbE QSFP-DD ports, 1RU fixed
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Cisco

Cisco N3K-C3432D-S | Nexus 3400 32-Port 400G Switch, 25.6Tbps, Layer 3

N3K-C3432D-S

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Description

The Cisco Nexus 3432D-S is a high-performance data center switch featuring 32 ports of 400 Gigabit Ethernet QSFP-DD connectivity with 25.6 Tbps switching capacity. Engineered with 50 Gbps PAM4 SerDes technology and a 12.8 Tbps ASIC, this 1RU switch delivers industry-leading power efficiency and ultra-low latency of 370ns. Ideal for cloud computing, high-performance computing, and massively scalable data center environments requiring advanced analytics and programmable pipeline capabilities.

Features

32x 400 Gigabit Ethernet QSFP-DD ports with backward compatibility for QSFP56, QSFP28, and QSFP+
- 25.6 Tbps switching capacity with 12.8 Tbps ASIC for ultra-high throughput
- Industry-leading low latency of 370ns at 400G for latency-sensitive applications
- 50 Gbps PAM4 SerDes technology delivering exceptional power efficiency per watt
- Programmable pipeline with flexible profiles: LPM-optimized or Layer 3 host-optimized
- Deep network analytics including per-flow monitoring, queue forensics, and drop-packet forensics
- Virtual Port Channel (vPC) technology for Layer 2 multipathing without Spanning Tree
- 512-way Equal-Cost Multipath (ECMP) routing for Layer 3 fat-tree topologies
- Comprehensive tunneling support: VXLAN, VXLAN routing, MPLS, GPE, Geneve, NVGRE
- Port breakout flexibility: 2x200/50G, 4x100/50G/25G, 8x50G configurations
- Dual redundant 1500W AC power supplies with hot-swappable capability
- Six hot-swappable fan modules (5+1 redundancy) with forward or reverse airflow options
- Power-On Auto Provisioning (POAP) for touchless deployment and configuration
- Cisco NX-OS modular operating system with high availability and zero-impact operations
- IEEE 802.1Q VLAN, 802.1D/s/W Spanning Tree, 802.1AX/802.3ad Link Aggregation
- Advanced security features and comprehensive SNMP, SSH, and CLI management

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Port Configuration: 32x 400 Gigabit Ethernet QSFP-DD ports (backward compatible with QSFP56, QSFP28, QSFP+)
- Additional Ports: 2x 100/1000-Mbps SFP management ports
- Switching Capacity: 25.6 Tbps
- ASIC Performance: 12.8 Tbps
- Latency: 370 nanoseconds at 400G
- Memory: 16 GB RAM installed
- MAC Address Table: 120,000 entries
- Jumbo Frame Support: 9216 bytes
- Layer 3 Switching: Advanced routing with programmable pipeline (LPM-optimized or Layer 3 host-optimized profiles)
- Power Supply: Dual redundant 1500W AC power supplies (2 installed, 5+1 redundant fan modules)
- Power Consumption: 1240W operational
- Form Factor: 1RU rack-mountable
- Weight: 29.98 lbs (13.6 kg)
- Airflow Options: Forward (port-side intake) or reverse (port-side exhaust) with color-coded handles
- Operating System: Cisco NX-OS with CLI and XML interface
- Management: SNMP v1/v2/v3, SSH-2, RS-232 console, RJ45 console, SFP management port

FAQs

Q: What types of transceivers are compatible with the N3K-C3432D-S?
A: The switch supports the full range of QSFP-DD optical transceivers including Active Optical Cables (AOC) and Direct Attach Cables (DAC). Ports are backward compatible with QSFP56, QSFP28, and QSFP+ modules. Breakout configurations support 2x200/50G, 4x100/50G/25G, and 8x50G, enabling flexible connectivity from 10G to 400G.

Q: Does this switch require a software license for Layer 3 functionality?
A: Yes, the N3K-C3432D-S requires the N3K-LAN3K9 Nexus 3432D-S Layer 3 LAN Enterprise License for full Layer 3 routing capabilities and advanced features. The base switch includes Layer 2 functionality.

Q: What deployment scenarios is the Nexus 3432D-S best suited for?
A: This switch is engineered for demanding data center environments including spine-leaf architectures, high-performance computing clusters, high-frequency trading networks, cloud-scale fabrics, and IP storage networks. The 400G density with low latency makes it ideal for east-west traffic at scale.

Q: Can this switch be deployed in existing Nexus environments?
A: Yes, the N3K-C3432D-S runs Cisco NX-OS and integrates seamlessly with existing Nexus 3000 and 9000 series deployments. It supports Virtual Port Channel (vPC) technology for Layer 2 multipathing and 512-way ECMP for Layer 3 fat-tree designs, enabling flexible integration into modern data center topologies.

Q: What analytics capabilities does this switch offer?
A: The Nexus 3432D-S includes deep network analytics with per-flow monitoring, queue forensics, and drop-packet forensics. The programmable pipeline provides visibility into network behavior and performance, helping administrators troubleshoot issues and optimize traffic flows in real-time.

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