N3K-C3408-S, Cisco Nexus 3400 Switch, 32xQSFP-DD/High Density/Layer 3

  • Brand: Cisco
  • Model: N3K-C3408-S
Rating:
100%
5/5.0
List Price: $47,622.00
47% OFF
$25,064.00
  • 100% Genuine
    100% Genuine
    Original, factory-verified
    3-Year Warranty
    3-Year Warranty
    Extended, enterprise-grade
    Years Expertise
    24 Years Expertise
    Proven, deployment-focused
  • Condition
    • Original New
    Related
    expert
    Certified Expertise Builds Trust
    CCIE · JNCIE · NSE7 · ACDX · HPE Master ASE · Dell Server/AI Expert
    • Faster Delivery, Globally Ready

      Faster Delivery, Globally Ready

      20+ years of supply chain expertise for faster multi-stop delivery with smooth customs.

      48H Worldwide Shipping
      10+ Global Warehouses
    • Keep Projects On Time

      Keep Projects On Time

      Reliable availability and real-time shipment visibility to keep every critical IT project on schedule.

    • Leading Global Distributor Since 2002

      Leading Global Distributor
      Since 2002

      A global ICT bridge delivering authentic hardware and trusted service for over 20 years.

        21500+ Enterprise Clients Served200+ Countries & Regions Covered
    • Worry-Free Coverage with RSCare

      Worry-Free Coverage with RSCare

      3-Year warranty for enterprise hardware, including advanced RMA, diagnostics, spare parts support, and OEM service compatibility.

      Cisco SmartNet
      HPE Foundation Care
      Dell ProSupport
      Juniper Care
      Fortinet Support
    • Your Trusted Genuine Source

      Your Trusted Genuine Source

      Authorized partnerships with 30+ brands, including Cisco, HPE, Dell, Juniper, and Fortinet.

      100% Authentic Products
      100,000+ Multi-Brand SKUs Available
    Overview

    Cisco N3K-C3408-S Overview

    N3K-C3408-S is the Cisco Nexus 3408-S switch with 32 ports of QSFP-DD. The Cisco Nexus® 3400-S is the first 400G programmable switch series in the Nexus 3000 portfolio with 50 Gbps PAM4 Serial-Deserializers (SerDes), designed for data centers with industry-leading performance-per-watt power efficiency at low latency, offering leading analytics.

    Quick Spec

    Figure 1 shows the Cisco N3K-C3408-S Switch.

    N3K-C3408-S Appearance

    Table 1 shows the quick spec.

    SKU

    N3K-C3408-S

    Physical

  • ●   4 RU, 8-slot chassis

  • ●   Beacon LED

  • ●   Status LED

  • ●   Dual-redundant power supplies

  • ●   Redundant (2+1) fans

  • ●   Two 100/1000Mbps SFP ports

  • ●   One RS-232 serial console port

  • ●   One RJ45 and one SFP management port

  • ●   One USB port
  • Performance

    25.6-Tbps switching capacity

    Dimensions (height x width x depth)

    6.97 in. x 17.3 in. x 31.6 in.

    Product Details

    Main benefits of the Cisco Nexus 3400-S switches:

  • ●    With the 12.8-Tbps ASIC, the Cisco Nexus 3408-S series provides 128 ports of 100G or 32 ports of 400G, allowing customers to grow at scale with fewer numbers of switches in their fabric, simplifying management and reducing cost and number of hops.

  • ●    At 400G, the Cisco Nexus 3400-S offers the lowest latency in the industry, of 370ns at high-power efficiency

  • ●    The Cisco Nexus 3400-S offers a programmable pipeline translated to flexible profiles, whether Longest-Prefix-Matching (LPM)-optimized or layer 3 host-optimized. Customers can choose the profile to match their deployment needs.

  • ●    The Cisco Nexus 3400-S supports comprehensive encapsulation and tunneling technologies, Virtual Extensible LAN (VXLAN), VXLAN routing, Multiprotocol Label Switching (MPLS), Generic Protocol Extension (GPE), Geneve, Network Virtualization Using Generic Routing Encapsulation (NVGRE), and more.

  • ●    Cisco Nexus 3400-S switches enable deep network analytics, offering per flow monitoring, queue forensics, and drop-packet forensics to help monitor customer networks.

    The Cisco Nexus 3408-S is a 4-Rack-Unit (RU), 8-slot chassis with the flexibility of 100G or 400G Line-Card Expansion Modules (LEMs) offering 128 ports of 100G or 32 ports of 400G. The Cisco Nexus 3408-S is the industry’s highest port radix in a compact and energy-efficient form factor. The Cisco Nexus 3408-S supports HVAC/DC power inputs with forward airflow direction.

    The Cisco Nexus 3408-S has the following hardware configuration:

  • ●    4RU, 8-slot chassis

  • ●    NXM-X16C LEM with 16 ports of Quad-Small-Form-Factor 28 (QSFP28)

  • ●    NXM-X4D LEM with 4 ports of Quad Small Form-Factor Pluggable – Double Density (QSFP-DD)

  • ●    Beacon LED

  • ●    Status LED

  • ●    Dual-redundant power supplies

  • ●    Redundant (2+1) fans

  • ●    Two 100/1000-Mbps SFP ports

  • ●    One RS-232 console port

  • ●    One RJ45 and one SFP Management port

  • ●    One USB port

    Figure 2 shows the Cisco Nexus NXM-X16C, 16 ports of 100G.

    NXM

    The 100G LEMs are 16 ports of QSFP28 supporting 100, 50, 40, 25, and 10G speeds.

    The 400G LEMs are 4 ports of QSFP-DD that are backward-compatible with QSFP+, QSFP28, and QSFP56. Each QSFP-DD port can operate at 400, 100, 50, 40, and 25 Gbps.

    The Modules, License and Accessories

    Table 3 shows the recommended products.

    Part number

    Description

    NXM-X16C

    Nexus 100G Line Expansion Module

    NXM-X4D

    Nexus 400G Line Expansion Module

    NXM-XBLNK

    Nexus Blank Line Expansion Module

    NXA-FAN-300CFM-PI

    Nexus fan, forward airflow (port-side intake)

    NXA-PHV-2KW-PI

    Nexus 2KW HV power supply, forward airflow (port-side intake)

    NXA-PDC-2KW-PI

    Nexus 2KW DC power supply, forward airflow (port-side intake)

    NXA-PAC-2KW-PI

    Nexus 2KW AC power supply, forward airflow (port-side intake)

    N3K-LAN3K9

    Nexus 3408-S layer 3 LAN Enterprise License

    Compare to Similar Item

    Table 4 shows the comparison.

    SKU

    N3K-C3408-S

    N3K-C3432D-S

    Physical

  • ●   4 RU, 8-slot chassis

  • ●   Beacon LED

  • ●   Status LED

  • ●   Dual-redundant power supplies

  • ●   Redundant (2+1) fans

  • ●   Two 100/1000Mbps SFP ports

  • ●   One RS-232 serial console port

  • ●   One RJ45 and one SFP management port

  • ●   One USB port
  • ●   32 fixed 400-Gigabit-Ethernet QSFP-DD ports

  • ●   Beacon LED

  • ●   Status LED

  • ●   Dual-redundant power supplies

  • ●   Redundant (5+1) fans

  • ●   Two 100/1000Mbps SFP ports in front (ports 33 and 34)

  • ●   One RS-232 serial console port

  • ●   One RJ45 and one SFP management port

  • ●   One USB port
  • Performance

    25.6-Tbps switching capacity

    25.6 Tbps switching capacity

    Dimensions (height x width x depth)

    6.97 in. x 17.3 in. x 31.6 in.

    1.75 x 17.29 x 25.4 in. (4.44 x 43.91 x 64.51cm)

    Get More Information

    Do you have any question about the N3K-C3408-S

    Contact us now via Live Chat or [email protected].

  • Quality Certifications

    • ISO 14001
    • ISO 9001
    • RoHS
    • REACH
    • CE
    • FCC
    Specification

    Cisco N3K-C3408-S Specification

    N3K-C3408-S Specification

    Physical

    ●  4 RU, 8-slot chassis

    ●  Beacon LED

    ●  Status LED

    ●  Dual-redundant power supplies

    ●  Redundant (2+1) fans

    ●  Two 100/1000Mbps SFP ports

    ●  One RS-232 serial console port

    ●  One RJ45 and one SFP management port

    ●  One USB port

    Performance

    25.6-Tbps switching capacity

    Number of MAC addresses

    120K

    Number of IPv4/IPv6 unicast routes

    440K / 360K

    Number of IPv4/IPv6 hosts

    192K / 96K

    Number of IPv4 multicast routes

    Up to 96K with 8K groups

    Number of VLANS

    4K

    Number of ACL entries

    3.5K ingress and 1.5K egress

    Number of spanning-tree instances

    Rapid Spanning Tree Protocol (RSTP): 123

    Multiple Spanning Tree (MST) Protocol: 64

    Number of EtherChannels

    512

    Number of ports per EtherChannel

    up to 128

    Buffer size

    70 Mb

    Boot flash memory

    128 GB

    Latency

    370 nsec

    Number of power supplies

    2 (redundant)

    Power supply types

    AC (forward airflow)

    Input voltage

    100 to 240 VAC

    Frequency

    50 to 60 Hz

    Power supply efficiency

    89 to 91% at 220V

    Cooling

    Forward airflow: Port-side intake (air enters through ports and exits through fan tray and power supplies)

    Six individual, hot-swappable fans (5+1 redundant)

     

    Dimensions (height x width x depth)

    6.97 in. x 17.3 in. x 31.6 in.

    Weight

    N3K-C3408-S weight across configurations:

    ●  68 lb (without LEMs, PSUs, or fans)

    ●  107.7 lb (with eight 100G LEMs, PSUs, and fans)

    ●  104.5 lb (with eight 400G LEMs, PSUs, and fans)

    Individual LEMs:

    ●  NXM-X16C (100G LEM) – 3.6 lb

    ●  NXM-X4D (400G LEM) – 3.2 lb

    Operating temperature

    32 to 104° F (0 to 40°C)

    Storage temperature

    -40 to 158° F (-40 to 70°C)

    Relative humidity

    5 to 95% non-condensing

    Altitude (operating)

    Designed to meet: -500 ft to 13,123 ft

    Altitude (non-operating)

    -1000 ft to 30,000 ft

    Quality Certifications

    Need Help? Technical Experts Available Now.

    • +1-626-655-0998 (USA)
      UTC 15:00-00:00
    • +852-2592-5389 (HK)
      UTC 00:00-09:00
    • +852-2592-5411 (HK)
      UTC 06:00-15:00
    Need Help? Technical Experts Available Now.
    Q&A

    Questions & Answers

    What accessories are available for the N3K-C3408-S switch?

    Accessories include QSFP-DD transceivers, power supply units, rack mount kits, and management cables.

    How does the N3K-C3408-S switch compare to similar products?

    Compared to similar switches, the N3K-C3408-S offers higher port density and energy efficiency, suitable for large-scale deployments.

    Can the N3K-C3408-S switch be used in a data center?

    Yes, the N3K-C3408-S switch is specifically designed for high-performance data center environments.

    Why should I buy from router-switch.com?

    As an authorized distributor for 20+ top brands, router-switch.com offers:
    - Genuine products with full warranties.
    - Competitive pricing and bulk order discounts.
    - Professional pre-sales and after-sales support.

    Warranty
    • Your Trusted Global ICT Partner

      Delivering reliable, cross-border fulfillment with 20+ years of expertise, backed by rigorous QC, fast logistics, and worldwide warehousing.
      Global warehousing
      Global warehousing
      10+ hubs positioned for fast international dispatch and stable availability.
      Seamless cross-border
      Seamless cross-border
      QC-verified packing and predictable delivery via FedEx, DHL, UPS.
      Your Trusted Global ICT Partner
    • ICT Tools Hub for Confident Monitoring

      ICT Tools Hub for Confident Monitoring

      Stay informed on product lifecycle status and real-time inventory availability—supporting confident planning, sourcing, and operational execution.
      EOL/EOSL Checker
      Verify product lifecycle status to plan purchases and avoid EOL/EOSL risks.
      Request VIP Inventory Portal Access
      Connect via live chat for VIP access to real-time inventory on priority SKUs.
    • Certified Experts Across Leading Vendors

      Professional guidance for network, security & data center builds, delivered by certified experts with extensive, hands-on deployment experience.
      Multi-vendor engineering
      Multi-vendor engineering
      Certified expertise across Cisco, HPE, Aruba, Dell, Juniper, Huawei and Fortinet.
      Deployment-ready guidance
      Deployment-ready guidance
      Faster, safer rollouts with project-focused engineering guidance.
      Certified Experts Across Leading Vendors

    The Choice of 21,500 +Global Customers

    • Ford
    • Disney
    • Nestle
    • Toyota
    • Walmart
    • Philips
    • Ups
    • Huatt
    • Hsbc
    • Novartis
    • Siemens Healthineers
    • Bt
    • Reference Johnson
    • T
    • Att
    • Lgu
    • Sk Telecom
    • Veerizon
    Industry-Leading Warranty Coverage You Can Trust
    • 100% Low Price Guarantee
      100% Low Price Guarantee
      Router-switch.com offers genuine, high-quality ICT products at competitive wholesale prices—ensuring exceptional value without compromising quality.
    • 100% Quality Assurance
      100% Quality Assurance
      All items are brand new, original, and factory-sealed.
      Upon request, each unit can be fully tested and verified by a Cisco CCIE-certified engineer to ensure perfect working condition before shipment.
    • 100% Money-Back Guarantee
      100% Money-Back Guarantee
      If you are not satisfied with your purchase, you may request an exchange or full refund. Our customer service team will guide you through the return process quickly and smoothly.
      Visit Return Policy page for more information.
    • Free Cisco CCIE Technical Support
      Our Cisco CCIE-certified experts provide free professional support via phone, email, online chat, or remote login—helping you deploy and troubleshoot with confidence.
    • Flexible & Secure Payment and Shipping
      Flexible & Secure Payment and Shipping
      We support multiple secure payment and logistics options, backed by industry-leading verification:
      • Pay by wire transfer.
      • Pay with your paypal.
      • Pay with your Visa credit card.
      • Pay with your Mastercard credit card.
      • Pay with your Discover Card.
      • Pay by American Express.
      More
      • mcafee-secure
      • verisign-secured
      • pci-dss
      • ssl-encryption
      Visit How to Pay page for more information
    Warranty Coverage & RMA Instructions
    • Extended, Worry-Free Warranty Coverage
      Extended, Worry-Free Warranty Coverage
      • Factory New Sealed Enterprise Hardware: 3 Years
      • Factory New Sealed Consumer Devices: 1 Year
      Visit Warranty Policy page for more information
    • How to Get Support
      How to Get Support
      If you encounter issues with products, please reach out to your dedicated sales representative. They will assist with diagnostics, remote troubleshooting, and RMA processing if necessary.
      Visit Contact Us page for more support options.

    Best-Fit Solutions for Your Network

    Deploy DeepSeek-V3/R1: Powerful AI, Low Cost

    Deploy DeepSeek-V3/R1: Powerful AI, Low Cost

    Expert-configured AI solution: Same power, 90% savings—multi-scenario flexibility with Dell/Huawei/Lenovo options.

    AI
    Beyond Bandwidth: The 100G+ Data Center Architecture

    Beyond Bandwidth: The 100G+ Data Center Architecture

    The must-have 100G foundation - AI-ready growth, zero-latency performance

    Data Center
    400G/800G Ethernet Switch: Maxmize Margins via AI-Ready Solutions

    400G/800G Ethernet Switch: Maxmize Margins via AI-Ready Solutions

    High-Profit data center switches from Cisco, Huawei, Mellanox & Juniper.

    Ethernet Switch
    Download

    Resources Downloads

    Support and Resources
    Model Datasheet

    Product Tags