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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
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Title: Surplus

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Product Description

The ISR4321-AX/K9 Cisco integrates a range of networking capabilities with an aggregate throughput of 50 Mbps to 100 Mbps, supporting versatile connectivity options including 2 RJ-45 ports, 1 SFP port, and 2 NIM slots for expanded network module functionality. It is equipped with 4 GB of DDR3 memory by default, expandable to 8 GB, and 4 GB of flash memory, also expandable to 8 GB, to adequately support its operations. Designed for efficiency and scalability, this router operates within a 100 VAC to 240 VAC input voltage range, requiring a typical power of 36 W and offering a maximum power consumption of 125 W with an AC power supply, or 260 W with a PoE power supply, all within a compact 1 RU rack height.

FAQs for the ISR4321-AX/K9

  • What is the aggregate throughput range of this networking device?
    The aggregate throughput range is 50 Mbps to 100 Mbps.
  • How many total onboard WAN or LAN ports does the device have?
    It has 2 10/100/1000 ports.
  • Are there RJ-45 ports available on this device?
    Yes, there are 2 RJ-45 ports.
  • How many SFP ports are included?
    The device includes 1 SFP port.
  • What is the memory capacity of this device?
    The device comes with 4 GB (Default) / 8 GB (Maximum) DDR3 memory.
  • Does the device support OIR (Online Insertion and Removal)?
    Yes, OIR support is available.
  • What is the minimum AC input voltage required for operation?
    The minimum AC input voltage required is 100 VAC.
  • What are the power specifications of the device?
    Typical power consumption is 36 W, maximum power with AC power supply is 125 W, and with PoE power supply is 260 W.
  • Can you detail the physical dimensions of the device?
    The device measures 44.55 cm in height, 369.57 in. in width, and 294.64 cm in depth.
  • What are the expansion slot capabilities of this networking hardware?
    It has 2 NIM slots, 1 onboard ISC slot, and does not have enhanced service module slots.

Product Review

The Cisco ISR4321-AX/K9 offers a flexible range of connectivity options with two onboard WAN/LAN ports, two RJ-45 ports, and one SFP port, accommodating a variety of network infrastructures. However, its aggregate throughput of 50 Mbps to 100 Mbps might limit performance in high-demand environments, potentially restricting its application in larger or more data-intensive networks. The router supports upgradable memory and flash storage, from 4 GB to 8 GB, allowing for future enhancements, and its 1 RU rack height makes it a compact choice for space-constrained setups.


The CISCO ISR4321-AX/K9 is a versatile and efficient solution designed for small to medium-sized enterprise branch offices, delivering highly secure data, voice, video, and application services. Key to its performance is an aggregate throughput ranging from 50 Mbps to 100 Mbps, which ensures smooth and reliable operations across various tasks. This device is equipped with a comprehensive set of hardware specifications that cater to a wide range of networking needs. It features two onboard WAN or LAN 10/100/1000 ports for high-speed connectivity options. Additionally, it includes two RJ-45 ports for Ethernet connections and one SFP port, providing flexibility for fiber optic connections. To expand its capabilities further, the ISR4321-AX/K9 offers two Network Interface Module (NIM) slots and one onboard Internal Services Card (ISC) slot, allowing for customization and scalability according to the network demands. Memory capacity on this model starts at 4 GB of DDR3, which is upgradable to 8 GB to support more complex operations and higher throughput. Similarly, its flash memory begins at 4 GB and can also be expanded to 8 GB, ensuring ample storage for the operating system and applications. Despite its comprehensive features, the unit does not include Enhanced Service Module slots, focusing instead on streamlined efficiency. The ISR4321-AX/K9 supports Online Insertion and Removal (OIR), facilitating easy upgrades and maintenance without significant downtime. This capability is crucial for businesses requiring continuous operation and minimal interruption. Power specifications indicate versatility and efficiency in energy consumption. The device operates within a wide AC input voltage range (100 VAC to 240 VAC) and frequency (47 Hz to 63 Hz), making it suitable for various electrical environments. Its AC input current range is from 1.5 to 0.6 A, with a surge current capacity of 90 A, ensuring the router can handle power fluctuations. Typical power consumption stands at 36 W, with a maximum power draw of 125 W using an AC power supply. When equipped with a Power over Ethernet (PoE) power supply, it can reach up to 260 W, supporting devices requiring power through Ethernet connections. Physically, the ISR4321-AX/K9 is designed to fit in a standard 1 Rack Unit (RU) space, making it compact enough for small racks while maintaining accessibility for maintenance and monitoring. Its dimensions are detailed as follows:
  • Height: 44.55 cm
  • Width: 369.57 in.
  • Depth: 294.64 cm
This compact size, combined with its powerful features, makes the CISCO ISR4321-AX/K9 an ideal choice for organizations looking to efficiently manage their network infrastructure with a reliable, scalable solution. Whether deployed in a standalone environment or as part of a larger network, this router delivers the performance and flexibility needed to meet the evolving demands of modern businesses.


Product Number ISR4321-AX/K9
Manufacturer CISCO
Throughput Capacity 50 Mbps to 100 Mbps
Integrated WAN/LAN Ports 2 (Gigabit Ethernet)
Gigabit Ethernet Ports 2
Small Form-factor Pluggable (SFP) Ports 1
Network Interface Module (NIM) Slots 2
Internal Services Card (ISC) Slot 1
Standard Memory 4 GB DDR3
Maximum Memory 8 GB DDR3
Standard Flash Storage 4 GB
Maximum Flash Storage 8 GB
Service Module Slots for Expansion 0
Online Insertion and Removal (OIR) Supported
Minimum Input Voltage 100 V
Maximum Input Voltage 240 V
Input Frequency Range (Low) 47 Hz
Input Frequency Range (High) 63 Hz
Input Current Range 1.5 A to 0.6 A
Surge Current 90 A
Power Consumption (Typical) 36 W
Max Power with AC Supply 125 W
Max Power with PoE Supply 260 W
Unit Size 1 Rack Unit (RU)
Device Height 44.55 cm
Device Width 369.57 cm
Device Depth 294.64 cm

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