United States$5,000,000+
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Usman Farooq
5
The QSFP-DD density is impressive. This switch supports our highest bandwidth requirements with ease.
N3K-C3408-S
Nexus 3408-S switch with 32 ports of QSFP-DD
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Name:
N3K-C3408-S
- Description:
- Nexus 3408-S switch with 32 ports of QSFP-DD
- Rating:
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- Brand:
- Cisco
- GTIN:
- 882658659867
- Condition:
- Warranty:
- 3
- List Price:
$47,622.00
- Price:
$25,062.0047.4% off
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1
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N3K-C3408-S Overview
N3K-C3408-S is a high-performance, rack-mount switch engineered with a robust architecture that supports both Layer 2 and Layer 3 operations, providing versatile deployment options in enterprise networks and data centers. It features a redundant power supply configuration and a combination of copper and fiber ports, ensuring reliable operation and connectivity scalability for demanding environments.
The switch is optimized for high throughput with industry-class switching capacity and supports stacking for simplified management and scalable network design. With a balanced mix of 10/100/1000 Ethernet interfaces and combo SFP uplink ports configured for 10G, N3K-C3408-S is ideal for applications ranging from campus connectivity to data center aggregation.
N3K-C3408-S price is $25,062.00, a 47.4% saving from the Cisco list price of $47,622.00. N3K-C3408-S is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for N3K-C3408-S for additional pricing. Browse the full Nexus 3000 Switches series or explore all Cisco products.
N3K-C3408-S Specifications
- Product Type
- Switch
- Power Source
- Redundant Power Supply
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Power Consumption
- 210 W
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 48 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Combo
- Redundant Power Supply Supported
- Yes
- Manufacturer Part Number
- N3K-C3408-S
- Uplink Configuration
- 10G
- IOS
- IP Services
- POE Support
- Non POE
- SFP Ports
- Combo
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- N/A
- Flash Memory
- 256 MB
- Switching Capacity
- 480 Gbps
- Switching Capacity with Stacking
- N/A
- Product Name
- Cisco Nexus 3408-S Switch
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 15 inches
- Weight
- 12 lbs
N3K-C3408-S Use Case
Hyperscale Data Center Spine with 12.8Tbps Non-Blocking Fabric
In a cloud provider’s hyperscale data center, the N3K-C3408-S Nexus 3408-S switch with 32 ports of QSFP-DD delivers 12.8Tbps of spine capacity to support east-west traffic for thousands of VMs and containers. Benefit: Reduces oversubscription ratios by 50% and lowers latency to sub-600ns, enabling 3× higher application throughput.
AI/ML/GPU Cluster Aggregation for High-Performance Computing
For AI/ML training clusters housing 100+ GPU servers, the Nexus 3408-S switch aggregates 400Gbps links via 32 QSFP-DD ports to sustain parallel data flows at microsecond latency. Benefit: Accelerates model convergence by 20% and cuts inter-node data transfer times by 30%, speeding time-to-insights.
5G Network Core and Edge Aggregation with Deterministic Latency
In telecom 5G core and edge environments, the N3K-C3408-S Nexus 3408-S switch aggregates high-density 400Gb connections from distributed units, offering in-service upgrades and carrier-grade resiliency. Benefit: Ensures sub-10ms deterministic latency at scale to 20 million subscribers and simplifies operational overhead.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 N3K-C3408-S |  N3K-C3064TQ-32T |  N3K-C3132Q-40GX |  N3K-C3172TQ-10GT |  N3K-C31108TC-V | |
|---|---|---|---|---|---|
| Depth | 15 inches | 18.0 inches | 18 inches | 17 inches | 18 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 256 MB | 256 MB | 256 MB | 32 MB | 64 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1.75 inches | 1.75 inches | 1.75 inches |
| IOS | IP Services | IP Services | IP Services | IP Services | IP Services |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | N3K-C3408-S | N3K-C3064TQ-32T | N3K-C3132Q-40GX | N3K-C3172TQ-10GT | N3K-C31108TC-V |
| Media Type Supported | Combo | Twisted Pair | Fiber | Fiber | Twisted Pair |
| Memory | 256 MB | 512 MB | 512 MB | 256 MB | 256 MB |
| Number of Downlink Ports | 48 Ports | 32 Ports | 40 Ports | 8 Ports | 48 Ports |
| Number of Ethernet Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports | Under 12 Ports | 24–48 Ports |
| POE Support | Non POE | Non POE | Non POE | Non POE | Non POE |
| Port/Expansion Slot Details | N/A | 32 fixed 10/100/1000 ports, 4 dedicated 10G SFP+ uplink ports | 40 x 40G QSFP+ ports | Fixed 10-Gigabit Ethernet ports | N/A |
| Power Consumption | 210 W | N/A | N/A | N/A | 370 W |
| Power Source | Redundant Power Supply | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply / N/A | AC Power Supply | Redundant Power Supply |
| Product Name | Cisco Nexus 3408-S Switch | Cisco Nexus 3064TQ-32T Fixed Switch | Cisco Nexus 3132Q-40GX Switch | Cisco Nexus 3172TQ 10-Gigabit Ethernet Switch | Cisco Nexus 31108TC-V Switch |
| Product Type | Switch | Switch | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | Yes | Yes | Yes | Yes | Yes |
| SFP Ports | Combo | 4 SFP Ports | N/A | 4 SFP Ports | Combo |
| Switching Capacity | 480 Gbps | 640 Gbps | 1280 Gbps | N/A | 1280 Gbps |
| Switching Capacity with Stacking | N/A | N/A | N/A | N/A | 2560 Gbps |
| Uplink Configuration | 10G | 10G | 40G | 10G | 10G |
| Weight | 12 lbs | 20 lbs | 15 lbs | 12 lbs | 22 lbs |
| Width | 17.5 inches | 17.5 inches | 19 inches | 19 inches | 19 inches |
Reviews & Ratings
H
Helena Fischer
5
Built for next-generation networks. Performance, stability, and scalability have all been excellent.
M
Matthew Collins
4
Handles extreme workloads reliably. It's a strong foundation for our high-speed data center fabric.
Y
Yuki Matsumoto
4
We chose this switch for future growth. It delivers outstanding performance and efficiency.
P
Paul Henderson
5
A powerful, well-designed switch that meets demanding enterprise networking needs without compromise.
Questions & Answers
What is the Cisco N3K-C3408-S Nexus 3408-S switch?
The Cisco N3K-C3408-S Nexus 3408-S is a high-density data center switch featuring 32 QSFP-DD ports for flexible 100G, 200G, or 400G connectivity.
How many ports and speeds does the Nexus 3408-S support?
The Nexus 3408-S offers 32 QSFP-DD ports that natively support 100G and 400G speeds, with optional 200G breakouts via QSFP-DD modules.
What are QSFP-DD ports on the N3K-C3408-S?
QSFP-DD (Quad Small Form-Factor Pluggable Double-Density) ports are eight-lane interfaces on the Nexus 3408-S that enable up to 400G per port for ultra-high bandwidth.
What is the total switching capacity of the Nexus 3408-S?
The Nexus 3408-S delivers up to 25.6 Tbps of non-blocking switching capacity to support large-scale data center fabrics.
Which Cisco NX-OS software runs on the N3K-C3408-S?
The Nexus 3408-S runs Cisco NX-OS with full feature commonality, providing advanced automation, telemetry, and SDN integration.
What are the typical use cases for the Cisco Nexus 3408-S?
The Nexus 3408-S is optimized for leaf/spine architectures, AI/ML clusters, HPC environments, and service provider backbones requiring ultra-low latency and high throughput.
What is the average latency of the N3K-C3408-S Nexus switch?
The Nexus 3408-S delivers sub-600 nanosecond latency for line-rate forwarding at all supported speeds.
What power efficiency features does the Nexus 3408-S offer?
The Nexus 3408-S includes front-to-back cooling, energy-efficient power supplies, and Cisco Energywise® support to minimize data center power consumption.
Which form factor and dimensions apply to the Cisco N3K-C3408-S?
The Nexus 3408-S is a 2-rack-unit (2RU) fixed configuration switch designed for standard 19-inch data center racks.
What port breakout options are available on the Nexus 3408-S?
Each QSFP-DD port on the Nexus 3408-S can be broken out into four 100G or two 200G interfaces using Cisco-qualified breakout cables or modules.
How does the Cisco Nexus 3408-S integrate with Cisco ACI?
The Nexus 3408-S fully integrates with Cisco ACI through native policy enforcement, zero-touch provisioning, and centralized management in the ACI controller.
What management interfaces are supported on the N3K-C3408-S?
The switch provides CLI, REST API, SNMP v3, and out-of-band management through a dedicated 1G Ethernet management port.
What warranty and support options are available for the Nexus 3408-S?
Cisco offers a limited lifetime hardware warranty with next-business-day replacement and optional Smart Net® Total Care for 24/7 support and software updates.
How scalable is the Cisco N3K-C3408-S for future growth?
With 32 QSFP-DD ports supporting 100G, 200G, and 400G, the Nexus 3408-S provides investment protection for evolving data center bandwidth needs.
What power supplies and redundancy features does the Nexus 3408-S provide?
The switch supports dual hot-swappable 1200W or 2400W power supplies and redundant fans for continuous operation.
How do I order or configure the N3K-C3408-S for my network?
Contact your Cisco reseller or use the Cisco Commerce Workspace (CCW) to configure part number N3K-C3408-S with desired power supply and software options.