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by Cisco
Product Line: Cisco 4000 Series
Product Type: Integrated Services Router
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Original price $0.00 - Original price $0.00
Original price
$0.00 - $0.00
Current price $0.00
Title: Surplus

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Product Description

The ISR4451-X/K9 offers a default aggregate throughput of 1 Gbps, upgradeable to 2 Gbps with a Performance License, and can achieve CEF only throughput over 4 Gbps. It is equipped with 4 onboard WAN or LAN 10/100/1000 ports, 4 RJ-45 ports, and 4 SFP ports, alongside 2 Enhanced Service Module slots, 1 Doublewide Service Module slot, and 3 NIM slots for extensive connectivity and module expansion. The router supports OIR (Online Insertion and Removal), comes with 4 GB DDR3 RAM (upgradable to 16 GB), 8 GB of flash memory (expandable to 32 GB), and features multiple power supply options including AC, DC, and PoE, making it versatile for various networking environments.

FAQs for the ISR4451-X/K9

  • What is the default aggregate throughput of the device?
    The default aggregate throughput is 1 Gbps.
  • How many total onboard WAN or LAN 10/100/1000 ports does the device feature?
    The device features 4 total onboard WAN or LAN 10/100/1000 ports.
  • Can the aggregate throughput be increased, and if so, to what capacity?
    Yes, the aggregate throughput can be increased to 2 Gbps with a Performance License.
  • What types of ports are available for connectivity?
    The device includes 4 RJ-45 ports and 4 SFP ports for connectivity.
  • Is there support for OIR (Online Insertion and Removal)?
    Yes, OIR support is available on the device.
  • What are the memory specifications of the device, including default and maximum capacities?
    The device comes with 4 GB DDR3 RAM as default memory and supports up to 16 GB DDR3 RAM as maximum memory.
  • How many External USB 2.0 Type A slots are available on the device?
    There are 2 External USB 2.0 Type A slots available.
  • What are the power supply options for the device?
    The device offers internal power supply options including AC, DC, and PoE.
  • What is the typical power consumption of the device?
    The typical power consumption of the device is 158 W.
  • What are the operating temperature and relative humidity ranges for the device?
    The operating temperature range is 0 °C to 40 °C and the relative humidity range is 5% to 85%.

Product Review

The CISCO ISR4451-X/K9 offers scalable performance, with default throughput at 1 Gbps and the option to upgrade to 2 Gbps through a performance license, supporting over 4 Gbps with CEF. Hardware flexibility is a significant advantage, featuring four 10/100/1000 Ethernet ports, four SFP ports, and multiple slots for enhanced service modules, NIMs, and doublewide service modules, alongside a comprehensive range of power supply options. However, the base memory and flash memory capacities are relatively limited at 4 GB and 8 GB, respectively, necessitating potential upgrades for memory-intensive applications.


The CISCO ISR4451-X/K9 is a versatile and powerful integrated services router designed to meet the needs of modern businesses requiring high-speed data, voice, and video applications. This product is engineered to provide a high level of performance and reliability for enterprise-grade networking. With its advanced features and specifications, it serves as a foundational piece in any network infrastructure, offering enhanced security, mobility, and cloud services. Key to its performance is the router's ability to deliver aggregate throughput of 1 Gbps by default, which can be increased to 2 Gbps with the addition of a Performance License. For operations requiring even higher throughput, it supports over 4 Gbps in CEF-only mode, showcasing its capacity to handle heavy data loads with ease. This capability ensures that businesses can maintain efficient operations even as demand on their network increases. Connectivity options on the CISCO ISR4451-X/K9 are extensive, featuring: - Four 10/100/1000 ports for WAN or LAN connections, allowing for flexible network configurations. - Four RJ-45 ports and four SFP ports, enabling both copper and fiber connections to adapt to various networking requirements. - Two enhanced service module slots and one doublewide service module slot, the latter of which can be used in lieu of singlewide SM-X modules, providing scalability and the flexibility to add additional features and capabilities. Further enhancing its configurability are three Network Interface Module (NIM) slots, which support OIR (Online Insertion and Removal), ensuring minimal disruption during upgrades or maintenance. An onboard ISC slot adds to the router’s versatility, allowing for further customization. The hardware is equipped with 4 GB of DDR3 RAM for the control and services plane by default, which can be expanded up to 16 GB to support more intensive applications and services. Similarly, flash memory starts at 8 GB and can be expanded up to 32 GB, offering ample storage for the router's operating system and configuration files. For external connectivity, the device includes two USB 2.0 Type A slots and one USB Type B mini slot, alongside standard serial console and auxiliary ports, facilitating easy management and configuration. Power supply options are comprehensive, supporting internal AC, DC, and PoE sources, with an AC input voltage range of 100 to 240 VAC. Its typical power consumption is 158 W, making it an efficient choice for continuous operation. The router's design is compact and rack-mountable, measuring 3.5 x 17.25 x 18.5 inches, and it operates effectively within a temperature range of 0 °C to 40 °C and a relative humidity of 5% to 85%, ensuring reliability in a variety of environments. In conclusion, the CISCO ISR4451-X/K9 stands out as a highly capable and adaptable router that can serve as the backbone of any modern network infrastructure, offering high-speed connectivity, extensive configuration options, and reliable performance. Its design and specifications cater to the demanding requirements of enterprise environments, making it a valuable asset for any organization looking to enhance its network capabilities.


Part NumberISR4451-X/K9
Base Throughput1 Gbps
Throughput with Performance License2 Gbps
CEF-Only Throughput MaximumAbove 4 Gbps
Integrated WAN/LAN Ethernet Ports Count4
Number of RJ-45 Interfaces4
Quantity of SFP Interfaces4
Slots for Enhanced Service Modules2
Slots for Doublewide Service Modules1 (excluding Singlewide SM-X Modules)
Network Interface Module Slots3
Support for Online Insertion and RemovalYes
Integrated Service Card Slots1
Initial RAM4 GB DDR3 (Control/Services Plane)
RAM Ceiling16 GB DDR3
Base Flash Storage8 GB
Flash Storage Capacity32 GB
USB 2.0 Type A Ports2
Mini USB Type B Ports1
Console Port via Serial1
Auxiliary Serial Port1
Options for Power SupplyInternal: AC, DC, PoE
AC Power Range100 to 240 VAC
Standard Power Consumption158 W
Dimensions (H x W x D)3.5 x 17.25 x 18.5 in.
Operational Temperature Range0 °C to 40 °C
Humidity Tolerance5% to 85%

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