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N3K-C3408-S
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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:
Added to cart 28 times recently
- Availability:
2 In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 882658659867
- Condition:
Certified Refurbished
Professionally inspected, bench-tested, and firmware-verified, with configurations wiped. Restored to full working order and backed by our warranty.
- Warranty:
- 3
- List Price:
$47,622.00
- Price:
$25,062.0047.4% off
Quantity:
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
- Brand
- Cisco
- 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
- Flash Memory
- 256 MB
- Switching Capacity
- 480 Gbps
- 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.
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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 |
| 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 |
| 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 |
Compliance & Coverage
100% Genuine Product Guarantee
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
Up to 3-Year Warranty Coverage
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
Hassle-Free RMA & Returns
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Rigorously Tested & Quality Assured
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Expert Technical Support
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
Fast Global Delivery
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Reviews & Ratings
U
Usman Farooq
5
The QSFP-DD density is impressive. This switch supports our highest bandwidth requirements with ease.
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.