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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 ISR4351K9 Cisco router offers an aggregate throughput of 200 Mbps, which can be upgraded to 400 Mbps with a performance license, and supports CEF only throughput over 2 Gbps. It is equipped with 3 RJ-45 ports, 3 SFP ports, and provides expansion capabilities through 2 enhanced service module slots, 1 doublewide service module slot, and 3 NIM slots. The device starts with 4 GB DDR3 RAM (expandable to 16 GB), 4 GB of flash memory (expandable to 16 GB), and offers a variety of connectivity options including 2 external USB 2.0 Type A slots, a USB Type B mini slot, and supports both AC and DC power supply options.

FAQs for the ISR4351K9

  • What is the default aggregate throughput of the device?
    The default aggregate throughput is 200 Mbps.
  • How many total onboard WAN or LAN 10/100/1000 ports are available?
    There are 3 onboard WAN or LAN 10/100/1000 ports.
  • Can the aggregate throughput be increased, and if so, to what extent?
    Yes, the aggregate throughput can be increased to 400 Mbps with a Performance License.
  • What are the options for power supply with this device?
    The device supports internal AC, DC, and PoE power supply options.
  • What is the maximum CEF only throughput the device supports?
    The maximum CEF only throughput supported is over 2 Gbps.
  • How many SFP ports does the device feature?
    There are 3 SFP ports on the device.
  • What is the default and maximum memory capacity?
    The device comes with 4 GB DDR3 RAM by default, which can be expanded up to 16 GB.
  • Describe the device's USB connectivity options.
    The device has 2 external USB 2.0 Type A slots and 1 USB Type B mini slot.
  • What are the dimensions and rack height of the device?
    The device measures 3.5 x 17.25 x 18.5 inches with a rack height of 2 RU.
  • Does the device support hot swapping of network interface modules (NIMs)?
    Yes, the device supports online insertion and removal (OIR) for network interface modules.

Product Review

The Cisco ISR4351K9 offers scalable performance with default aggregate throughput at 200 Mbps, upgradeable to 400 Mbps with a performance license, and boasts a CEF-only throughput exceeding 2 Gbps, catering to varying bandwidth demands. With a comprehensive set of interfaces including three 10/100/1000 Ethernet ports, three SFP ports, and options for enhanced service modules, this router supports diverse connectivity needs. However, its default memory and flash memory start at 4 GB, necessitating potential upgrades to the maximum 16 GB for optimal performance in memory-intensive environments, representing an additional cost consideration.


The Cisco ISR4351K9 is a versatile router designed to meet the demands of midsize and large enterprise operations. With its advanced features and scalable options, it offers an efficient solution for managing network traffic and ensuring secure connectivity. This model starts with an aggregate throughput of 200 Mbps, which can be increased to 400 Mbps with the performance license. For operations requiring high-speed data processing, the router also supports over 2 Gbps of aggregate CEF only throughput, making it suitable for handling large volumes of data efficiently. The hardware includes three onboard WAN or LAN 10/100/1000 ports, providing flexibility in connecting to different network types without the need for additional modules. Additionally, it features three RJ-45 ports and three SFP ports, enabling it to support a wide range of connectivity options including fiber and copper links. For expanding its capabilities, the ISR4351K9 is equipped with two enhanced service module slots and one doublewide service module slot, which can be used when no singlewide SM-X modules are installed. It also offers three NIM slots, further extending its functionality to meet specific network requirements. Support for Online Insertion and Removal (OIR) ensures that the router can maintain continuous operation, even when modules are being added or replaced. The presence of an onboard ISC slot adds to its configurability, providing an additional option for customization. The device comes with 4 GB of DDR3 RAM, which can be expanded up to 16 GB to accommodate more demanding applications. Similarly, its default flash memory of 4 GB can also be increased to 16 GB, offering ample space for software and configuration files. Connectivity options are further enhanced with two external USB 2.0 Type A slots and one USB Type B mini slot, facilitating easy file transfer and system updates. A serial console port and a serial auxiliary port are included for management and troubleshooting purposes. Power supply options are comprehensive, with internal AC, DC, and PoE available to suit various operational environments. The router operates within a voltage range of 100 to 240 VAC and has a typical power consumption of 48 W, making it energy efficient. Measuring 3.5 x 17.25 x 18.5 inches and occupying 2 rack units (RU) in height, the ISR4351K9 is designed for rack-mount installation, allowing for efficient use of space in equipment rooms or data centers. It operates within a temperature range of 0 °C to 40 °C, ensuring reliable performance under standard working conditions.
  • Aggregate Throughput (Performance License): 400 Mbps
  • Enhanced Service Module Slots: 2
  • Maximum Memory: 16 GB DDR3 RAM
In summary, the Cisco ISR4351K9 provides a powerful and flexible routing solution, capable of adapting to the evolving needs of modern enterprises. Its extensive connectivity options, expandable memory, and throughput capabilities make it an excellent choice for organizations looking to enhance their network infrastructure.


Part Number and Manufacturer Cisco ISR4351K9
Default Aggregate Throughput 200 Mbps
Aggregate Throughput with Performance License 400 Mbps
CEF Only Aggregate Throughput Capability Over 2 Gbps
Integrated WAN or LAN Ports Speed 3 x 10/100/1000
RJ-45 Interface Count 3
Number of SFP Interfaces 3
Enhanced Service Module (ESM) Slots 2
Availability of Doublewide ESM Slots 1 (Excludes Singlewide SM-X Modules)
NIM Slots Available 3
Online Insertion and Removal (OIR) Supported
Internal Service Card Slot (ISC) 1
Standard Memory 4 GB DDR3
Maximum Memory Capacity 16 GB DDR3
Initial Flash Memory 4 GB
Flash Memory Ceiling 16 GB
USB 2.0 Ports (Type A) 2
Mini USB Type B Slot 1
Console Port for Serial Connection 1
Auxiliary Serial Port 1
Power Supply Configuration Internal: AC, DC, PoE
AC Power Input Range 100 to 240 VAC
Power Consumption (Typical) 48 W
Dimensions (H x W x D) 3.5 x 17.25 x 18.5 inches
Operational Temperature Range 0 °C to 40 °C
Rack Units 2 RU

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