Express shipping to
Contact Us
Track Order
Search
Popular Search
Inquiry
Shopping Cart
Login

Coupon
Quote now,
save up to 8%.

Inquiry
Contact

Feedback
Your Feedback
How would you Rate us?
Ease of use:
Buying feedback:
Product details:
End of Life
main product photo

ISR4351-SEC/K9, Cisco ISR 4000 Router, 400Mbps throughput/3 WAN-LAN/3 SFP ports

  • Brand: Cisco
  • Model: ISR4351-SEC/K9
Rating:
95%
4.8/5.0
16 Reviews
List Price: $14,195.00
50% OFF
$7,167.00
Price Alert ×
ISR4351-SEC/K9, Cisco ISR 4000 Router, 400Mbps throughput/3 WAN-LAN/3 SFP ports
ISR4351-SEC/K9, Cisco ISR 4000 Router, 400Mbps throughput/3 WAN-LAN/3 SFP ports US$7,167.00
If you see a better price elsewhere, please let us know and we will work hard to find the product at the better price. We will notify you if the price drops.
Please enter a valid email address.
Please enter your name.
  • 100% Genuine
    100% Genuine
    Original, factory-verified
    3-Year Warranty
    3-Year Warranty
    Extended, enterprise-grade
    23 Years Expertise
    24 Years Expertise
    Proven, deployment-focused
    • Condition
    • Original New · Covered SN
    Related
    Express Shipping to United States Get Shipping Estimate
    Estimated shipping time: 2–6 business days via DHL, FedEx, UPS and more
    expert
    Certified Expertise Builds Trust
    CCIE · JNCIE · NSE7 · ACDX · HPE Master ASE · Dell Server/AI Expert
    Talk to an 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.

      Track Your Order
    • 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
    ISR4351-SEC/K9, Cisco ISR 4000 Router, 400Mbps throughput/3 WAN-LAN/3 SFP ports

    ISR4351-SEC/K9, Cisco ISR 4000 Router, 400Mbps throughput/3 WAN-LAN/3 SFP ports

    100% Genuine Ready to Ship
    $14,195.00
    50% OFF
    $7,167.00
    Overview
    Specification
    Reviews
    Q&A
    Warranty
    Download
    Overview
    End-of-Life Notice
    End-of-Life Notice
    ISR4351-SEC/K9 is officially EOL. Service support ends on 2028-11-30.
    For full lifecycle details, see ISR4351-SEC/K9 EOL.
    Recommended Replacement
    Recommended Replacement
    Official replacement model. Aligned with current deployment environments.
    C8300-2N2S-6T

    Cisco ISR4351-SEC/K9 Overview

    The Cisco ISR4351-SEC/K9 is an enterprise-class integrated services router designed for secure branch connectivity across Asia, Europe, Africa, and North America. Delivering 200Mbps to 400Mbps aggregate throughput, it combines routing, services, and security in a single platform optimized for distributors, SMB integrators, and end users. Three onboard 10/100/1000 WAN/LAN ports and three SFP-based ports provide flexible uplink options, while modular NIM and service-module slots simplify WAN migration and scalable service expansion for growing enterprise networks.

    Product Highlights

    400Mbps
    WAN Speed
    3GE+3SFP
    Flex Ports
    3 NIM
    Modular I\/O

    Product Components Breakdown

    Front Panel of the Product:

    ISR4351-SEC/K9 front Panel
    ①
    Power supply unit
    ③
    Router power On/Off switch
    ②
    Router fan tray
    ④
    LEDs

    Rear Panel of the Product:

    ISR4351-SEC/K9 Back Panel
    ①
    USB Type A port
    ⑦
    SFP port (GE 0/0/0)
    ②
    GE management port
    ⑧
    RJ-45 port (GE/0/0/2)
    ③
    USB Type B mini port
    ⑨
    NIM slots
    ④
    Auxiliary port
    ⑩
    Ground connection
    ⑥
    RJ-45 port (GE 0/0/1)

    Product Applications Scenarios

    Enterprise Network
    Provides secure, high-performance routing and modular WAN options for multi-branch enterprise networks, helping reduce backhaul costs and simplify centralized IT operations deployment.
    Cloud Services
    Delivers reliable 200–400Mbps connectivity and integrated security features to connect branches to public and private cloud services, lowering integration complexity and latency for users.
    Service Providers
    Ideal as managed CPE, combining flexible GE and SFP interfaces with modular NIM slots, enabling providers to standardize offerings and cut per-site deployment effort by up to 30%.

    Product Features Comparison

      Cisco Huawei Cisco Huawei
    Model ISR4351-SEC/K9, Cisco ISR 4000 Router, 400Mbps throughput/3 WAN-LAN/3 SFP ports AR651W-8P C3925-VSEC-CUBE/K9, Cisco C3925 Integrated Services Router, PVDM3-64/UC SEC License/FL-CUBEE-25 AR169, Huawei AR Series Router, 1VDSL WAN/4GE LAN
    Brand Cisco Huawei Cisco Huawei
    Routing Throughput 200Mbps to 400Mbps 4 Gbps n/a n/a
    Interface Configuration 3 WAN/LAN 10/100/1000 ports, 3 SFP-based ports 8 Ethernet ports, 2 SFP slots 3 x 10Base-T/100Base-TX/1000Base-T RJ-45; 2 x SFP; 2 x USB; 1 x RJ-45 console; 1 x mini-USB console; 1 x RJ-45 auxiliary 1 VDSL WAN; 4 x 10/100/1000M Ethernet LAN
    Supported Protocol n/a OSPF, BGP, IS-IS, RIPv1/v2 TCP/IP, UDP/IP, RSVP, IPSec, PPPoE, L2TPv3; OSPF, IS-IS, BGP, EIGRP, DVMRP, PIM-SM, IGMPv3, GRE, PIM-SSM, static IPv4/IPv6, PBR n/a
    VPN Capability n/a n/a VPN support, Dynamic Multipoint VPN (DMVPN), IPSec n/a
    Integrated Features Security bundle, OIR all I/O modules, PoE power option Wireless IEEE 802.11a/b/g/n/ac Firewall, NAT, MPLS, content filtering, QoS, IP telephony, voice/fax, IOS UC & Security software VDSL WAN, external power adapter

    Optional Add-ons

    Model Number Description
    NIM-2GE-CU-SFP Cisco dual-port Gigabit Ethernet RJ-45/SFP NIM for expanding ISR 4000 WAN/LAN connectivity.
    SM-X-4FXS-DID Cisco SM-X voice service module adding 4 FXS ports with DID support for ISR 4000 IP telephony.
    PWR-4350-AC Cisco AC power supply module for ISR 4351 routers, providing reliable branch power redundancy.

    Quality Certifications

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

    Cisco ISR4351-SEC/K9 Specification

    Model
    ISR4351-SEC/K9
    Brand
    Cisco
    Type
    Cisco ISR4351/K9 with Security Bundle
    Aggregate Throughput
    200Mbps to 400Mbps
    Total onboard WAN or LAN 10/100/1000 ports
    3
    RJ-45-based ports
    3
    SFP-based ports
    3
    Enhanced service-module slots
    2
    Doublewide service-module slots
    1 (assumes no singlewide SM-X modules installed)
    NIM slots
    3
    OIR (all I/O modules)
    Yes
    Onboard ISC slot
    1
    Default memory DDR3 ECC DRAM (combined control/services/data planes)
    4GB
    Maximum memory DDR3 ECC DRAM (combined control/services/data planes)
    16GB
    Default memory DDR3 ECC DRAM (data plane)
    NA
    Maximum memory DDR3 ECC DRAM (data plane)
    NA
    Default memory DDR3 ECC DRAM (control/services plane)
    NA
    Maximum memory DDR3 ECC DRAM (control/services plane)
    NA
    Default flash memory
    4GB
    Maximum flash memory
    16GB
    External USB 2.0 slots (type A)
    2
    USB console port (type B mini, up to 115.2 kbps)
    1
    Serial console port (RJ45, up to 115.2 kbps)
    1
    Serial auxiliary port (RJ45, up to 115.2 kbps)
    1
    Power-supply options
    Internal: AC, DC, and PoE
    Redundant power supply
    N/A
    AC input voltage
    100 to 240 VAC autoranging
    AC input frequency
    47 to 63 Hz
    AC input current range (AC power supply, maximum)
    7.1 to 3.0 A
    AC input surge current
    60 A peak and less than 12 Arms per half cycle
    Typical power (no modules)
    48W
    Maximum power with AC power supply
    430W
    Maximum power with PoE power supply (platform only)
    990W
    Maximum endpoint PoE power available from PoE power supply
    500W
    Weight
    20.88 kg

    Get more information

    Discover unbeatable prices and fast shipping for the ISR4351-SEC/K9, Cisco ISR 4000 Router, 400Mbps throughput/3 WAN-LAN/3 SFP ports . Access the detailed ISR4351-SEC/K9, Cisco ISR 4000 Router, 400Mbps throughput/3 WAN-LAN/3 SFP ports datasheet and ensure you're getting the best deal with our reliable delivery service. Need assistance? Our free live chat support is here to help. For more information about the product and pricing, contact us via live chat or email us at [email protected].

    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
    Get a Quote
    Live Chat
    Need Help? Technical Experts Available Now.
    Q&A

    Questions & Answers

    Does the ISR4351-SEC/K9 support WAN optimization?

    Yes, the ISR4351-SEC/K9 supports WAN optimization via WAAS, enhancing data transfer efficiency across the network.

    Is there an alternative to the ISR4351-SEC/K9 in the same series?

    Yes, other models in the Cisco 4000 ISR series like the ISR4321 provide alternative options based on your specific needs.

    What are common troubleshooting steps for the ISR4351-SEC/K9?

    Common troubleshooting steps include verifying port connections, checking firmware updates, and reviewing configuration settings.

    Are the products sold on router-switch.com authentic?

    Yes, router-switch.com only sells 100% genuine products from authorized brands. As a multi-brand authorized distributor, all items are sourced through official channels and include valid manufacturer warranties. Customers may verify authorization via brand websites or request certification documents.

    Learn More
    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
      EOL/EOSL Checker
      Verify product lifecycle status to plan purchases and avoid EOL/EOSL risks.
      Request VIP Inventory Portal Access
      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
      Trusted & Secure Payments ×
      100% Trusted, Secure Purchase at Router-switch.com
      • 120+ Local Currencies120+ Local Currencies
      • Multiple Payment OptionsMultiple Payment Options
      • 100% Secure Payments100% Secure Payments

      Choose the payment method that works for you—local options, multiple currencies, or bank transfers. Every payment is protected by SSL encryption, PCI DSS-level security, McAfee Secure, and VeriSign Secured for complete peace of mind.

      • tt
      • paypal
      • visa
      • mastercard
      • echeck
      • webmoney
      • discover
      • american-express
      • jcb
      • bank-transfer
      • western-union
      • qiwi
      • apple Pay
      • google pay
      Guaranteed Safe Checkout
      • ssl-encryption
      • pci-dss
      • mcafee-secure
      • verisign-secured
      View Payment Options
      • 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
    Transition Guide
    Model Datasheet
    Log in
    Register