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by Cisco
Product Line: Cisco Firepower 4100 Series
Product Type: Security Appliance
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Title: Surplus

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Product Description

The FPR-4120-K9 Cisco features a 1RU form factor with a single 12-Core processor and 128 GB DDR4 DRAM memory, optimized for high-performance computing environments. It supports up to 24 interfaces, including eight fixed 1 Gb and 10 Gb SFP+ ports, and provides two network module slots for expandability. Equipped with dual AC power supply slots, six fan module slots for efficient cooling from front to rear, and two SSD slots for storage, with a pre-installed MSP in the second slot, this device is designed for reliability and scalability in network infrastructure.

FAQs for the FPR-4120-K9

  • What is the form factor of this networking device?
    The form factor of the device is 1RU.
  • How is airflow directed within the device?
    Airflow is directed from front to rear, aligning with cold aisle to hot aisle configurations.
  • Can you detail the processor specifications?
    The device is equipped with a single 12-core processor.
  • What memory capacity does this device support?
    It supports 128 GB of DDR4 DRAM memory.
  • How many network interfaces does the device accommodate?
    The device can accommodate a maximum of 24 interfaces.
  • What types of management connectivity are available?
    It includes a 1 Gigabit Ethernet management port.
  • Are there any serial or USB ports?
    Yes, it includes one RJ-45 console for serial connectivity and one USB 2.0 Type A port.
  • What are the network port specifications?
    The device has eight fixed 1 Gb and 10 Gb SFP+ ports.
  • How many power supply slots are available?
    There are 2 AC power supply slots available.
  • What is the operating temperature range for this device?
    The operating temperature range is 0 °C to 40 °C.

Product Review

The Cisco FPR-4120-K9 offers high performance with its single 12-core processor and 128 GB DDR4 DRAM, supporting demanding network environments. However, its limitation to a maximum of 24 interfaces might restrict scalability in larger network setups. Additionally, the inclusion of both 1Gb and 10Gb SFP+ ports enhances flexibility in connectivity, though the fixed nature of these ports may limit configuration options for specific use cases.


The Cisco FPR-4120-K9 is a 1RU form factor network security appliance designed for efficient operation in demanding environments. This model includes rack mount slide rails, mount ears, and screws, ensuring easy installation in standard racks. It supports front-to-rear airflow, aligning with cold aisle to hot aisle data center configurations for optimal cooling. At the heart of the FPR-4120-K9 is a powerful single 12-core processor, complemented by 128 GB of DDR4 DRAM, providing the necessary computational power and memory resources for high-throughput networking tasks. The appliance can accommodate a maximum of 24 interfaces, allowing for flexible connectivity options. Management of the device is facilitated through a 1 Gigabit Ethernet management port. Additionally, it includes one RJ-45 console serial port and one USB 2.0 Type A port for local management and file transfers. Networking capabilities are robust, featuring eight fixed 1 Gb and 10 Gb SFP+ ports for high-speed data transmission. These SFP ports support both 1 Gb and 10 Gb connections, offering versatility in network design and expansion. The rear panel houses a grounding lug for safety and a power switch for easy control. Notably, the front panel is equipped with a locator beacon, aiding in the identification of the appliance within a rack. For expansion, the FPR-4120-K9 includes two network module slots and two AC power supply slots, allowing for redundancy and increased performance. It also features six fan module slots to ensure the system remains cool under heavy operational loads. Storage needs are met with two SSD slots, with the MSP (Management and Storage Processor) installed in the second slot, enhancing the device's management capabilities. The appliance is NEBS certified, indicating it meets specific reliability and safety standards for network equipment. It measures 1.75 x 16.89 x 29.7 inches without fans and weighs 30 lbs when devoid of power supply modules, network modules, and fans. The SSDs provide a storage capacity of 100 GB, sufficient for operating system files and other critical data. Operating requirements include an input AC voltage range of 100 to 240 VAC and an operating temperature range of 0 °C to 40 °C, ensuring reliability across various power supplies and environmental conditions. Key hardware specifications include: - Processor: Single 12-Core - Memory: 128 GB DDR4 DRAM - Storage: Two SSD Slots with a 100 GB capacity The Cisco FPR-4120-K9 stands out as a highly capable network security appliance, designed for scalability, performance, and reliability. Its comprehensive feature set and robust hardware specifications make it an ideal choice for enterprises looking to bolster their network security infrastructure.


Item Number and ManufacturerCisco FPR-4120-K9
Physical Configuration1RU
Included Mounting HardwareSlide rails, mounting brackets, and screws
Cooling DirectionFront to back, from cooler to warmer zones
CPU12-core processor
System Memory128GB DDR4 DRAM
Max Interface SupportUp to 24
Admin Interface1Gb Ethernet port
Console InterfaceSingle RJ-45 port
USB InterfaceOne Type-A USB 2.0 port
Fixed Ethernet PortsEight 1Gb and 10Gb SFP+ ports
SFP InterfaceEight 1Gb and 10Gb fixed ports
Chassis GroundingRear panel lug
Identification BeaconFront panel locator
Main Power ControlRear panel switch
Expansion Slots for Network ModulesTwo
AC Power Module BaysTwo
Cooling Fan BaysSix
Storage Expansion OptionsTwo SSD bays
Default MSP ConfigurationInstalled in the second SSD bay
Compliance with NEBSYes
Dimensions1.75 x 16.89 x 29.7 inches, excluding fans
Unit Weight30 pounds, without power or fan modules
Primary Storage Capacity100GB SSD
Power Requirements100-240V AC
Operational Heat Range0°C to 40°C

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