Cisco C9800-40-K9 10GB Ethernet Wireless Controller
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Cisco C9800-40-K9 Catalyst 9800 Wireless Controller Network Refurbished

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Part Number#: C9800-40-K9
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Short Description:
C9800-40-K9 Catalyst 9800 Network Rack-mountable 1u 4 X 10 Gigabytes (GB) Ethernet Small Form-Factor Pluggable Plus (SFP+) Management Device Wi-Fi 5 Wireless Controller | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

Product Overview for the Cisco C9800-40-K9 Catalyst 9800 Wireless Controller

The Cisco C9800-40-K9 Catalyst 9800 is a powerful network device designed to enhance the connectivity and management of networks. This rack-mountable 1U device offers a range of features and capabilities that make it an essential component for modern networking. The Cisco C9800-40-K9 Catalyst 9800 is an advanced network device designed to meet the demands of modern networks. It falls into the "rack-mountable 1U" category, making it ideal for data centers, server rooms, and other networking environments where space efficiency is crucial. This device is a powerhouse, offering an array of features that make it a worthy investment for organizations of all sizes.

Rack-Mountable 1U Design

This device is built in a rack-mountable 1U design. The "1U" refers to the device's height in rack units, and it is a common size for network equipment. This compact form factor is ideal for data centers and network closets where space is at a premium. The form factor of the Cisco C9800-40-K9 is rack-mountable, designed to fit seamlessly into standard 19-inch server racks. Its 1U height makes it compact and space-efficient, making it an excellent choice for data centers or network closets with limited space.

4 x 10 Gigabytes Ethernet Ports

The Catalyst 9800 offers four 10GB Ethernet ports. These high-speed ports facilitate fast data transfer, making it suitable for networks with heavy data traffic or high-bandwidth requirements. The device can support multiple connections simultaneously, ensuring smooth and efficient data flow. Connectivity is a critical aspect of any network device. The Cisco C9800-40-K9 boasts four 10 Gigabit Ethernet ports, offering high-speed data transfer and scalability. These ports allow you to connect various network components, such as switches, servers, and other devices, with ease.

Small Form-Factor Pluggable Plus Compatibility

The device is equipped with Small Form-Factor Pluggable Plus (SFP+) slots, which are essential for connecting the device to various network components. SFP+ modules are interchangeable, allowing for flexibility in adapting to different network environments and requirements. For greater flexibility and versatility, the Cisco C9800-40-K9 is compatible with Small Form-Factor Pluggable Plus (SFP+) modules. SFP+ modules allow for different types of connections, including optical fiber and copper, depending on your network's specific requirements.

High-Speed Connectivity

Equipped with 4 X 10 Gigabytes (GB) Ethernet Small Form-Factor Pluggable Plus (SFP+) ports, this network device is capable of handling high-speed data transfer. These ports are essential for connecting various network components and ensuring seamless data flow.

Data Transfer Rate

With a remarkable data transfer rate of 10 Gbps per port, the Cisco C9800-40-K9 ensures rapid data transmission, reducing bottlenecks and latency in the network. This feature is crucial for supporting data-intensive applications and services.

Management Capabilities

One of the standout features of the Cisco C9800-40-K9 is its comprehensive management capabilities. As a Wi-Fi 5 Wireless Controller, it can efficiently manage and control wireless networks, ensuring a stable and secure connection for users.

Network Management

The Cisco C9800-40-K9 Catalyst 9800 plays a pivotal role in managing networks. Here's a closer look at how it accomplishes this:

Wi-Fi 5 Wireless Controller

The Catalyst 9800 acts as a Wi-Fi 5 wireless controller. This means it provides the central intelligence required for managing and optimizing Wi-Fi networks. Wi-Fi 5, also known as 802.11ac, is a widely used wireless networking standard that offers high data rates and improved performance compared to previous generations. The Catalyst 9800 ensures the smooth operation of Wi-Fi 5 networks by handling tasks such as access point management, load balancing, and security.

Device Management

Beyond Wi-Fi management, the Catalyst 9800 serves as a general device manager for the network. It allows administrators to monitor and control network devices efficiently. This includes tasks like provisioning, configuration, and troubleshooting. With the ability to manage a wide range of devices, the Catalyst 9800 simplifies network administration.

Traffic Control and Quality of Service

One of the essential functions of the Catalyst 9800 is traffic control and QoS management. It enables network administrators to prioritize data traffic, ensuring that critical applications and services receive the necessary bandwidth and quality of service. This is vital for networks that support voice, video, and other latency-sensitive applications.

Security Management

Network security is of paramount importance, and the Catalyst 9800 plays a crucial role in ensuring the security of network communications. It can enforce security policies, detect and mitigate threats, and monitor network traffic for suspicious activity. With the rise in cyber threats, having a robust security management system is essential for network protection.

Enhanced Speed and Performance

Wi-Fi 5 provides significantly higher data rates compared to its predecessors, making it an excellent choice for networks with high bandwidth demands. This enhanced speed ensures that users can enjoy fast and reliable internet connections, whether they are streaming media, conducting video conferences, or accessing cloud-based applications.

Increased Network Capacity

Wi-Fi 5 technology offers greater network capacity, allowing more devices to connect simultaneously without sacrificing performance. This is particularly important in environments with a high density of users, such as large offices, educational institutions, and public spaces.

Improved Coverage and Reliability

The Cisco C9800-40-K9 Catalyst 9800's compatibility with Wi-Fi 5 ensures that networks provide better coverage and reliability. The use of advanced technologies like beamforming and MU-MIMO (Multi-User, Multiple Input, Multiple Output) helps in optimizing signal strength and reducing interference.

Backward Compatibility

While Wi-Fi 5 is a powerful wireless standard, it's important to note that the Catalyst 9800 also supports backward compatibility with earlier Wi-Fi standards (802.11a/b/g/n). This ensures that older Wi-Fi devices can still connect and function on the network, even if they don't support the latest standard.

Management Device

Efficient network management is a key element in ensuring network performance and security. The Cisco C9800-40-K9 serves as a robust management device that enables administrators to monitor and configure the network. This feature simplifies network administration tasks and enhances the overall efficiency of network management.

Wi-Fi 5 Compatibility

The Cisco C9800-40-K9 is fully compatible with Wi-Fi 5, also known as 802.11ac. This compatibility ensures that it can support the latest wireless standards, providing a seamless experience for Wi-Fi users. Wi-Fi 5 offers improved speed and performance compared to its predecessors, making it an excellent choice for businesses and organizations looking to deliver high-quality wireless connectivity.

Key Benefits of the Cisco C9800-40-K9 Catalyst 9800

The Cisco C9800-40-K9 Catalyst 9800 offers a range of key benefits that make it an excellent choice for network administrators and organizations. Here are some of the notable advantages:

High-Performance Networking

With 10GB Ethernet ports and Wi-Fi 5 support, the Catalyst 9800 ensures high-performance networking. It can handle the demands of data-intensive applications and provide a seamless experience for users.

Network Management Efficiency

The Catalyst 9800 simplifies network management tasks, allowing administrators to configure, monitor, and troubleshoot with ease. This efficiency is essential for maintaining a healthy and well-managed network.

Security Features

Security is a top priority in today's digital landscape. The Catalyst 9800 includes robust security features to protect your network from cyber threats and unauthorized access.

Seamless Wi-Fi Experience

For organizations looking to provide a seamless Wi-Fi experience to their users, the Cisco C9800-40-K9 is an excellent choice. Its compatibility with Wi-Fi 5 standards means that users can enjoy faster and more reliable wireless connectivity, which is essential for various applications, including video conferencing, online collaboration, and streaming.

Use Cases for the Cisco C9800-40-K9 Catalyst 9800

The Cisco C9800-40-K9 Catalyst 9800 is a versatile network device with various applications across different industries. Here are some common use cases:

Enterprise Networks

Large enterprises can benefit from the Catalyst 9800's scalability and high-performance features. It's well-suited for managing networks in corporate offices, ensuring reliable connectivity for employees and guests.

Scalability and Flexibility

One of the standout features of the Cisco C9800-40-K9 Catalyst 9800 is its scalability. The four 10 Gigabit Ethernet ports, in addition to SFP+ compatibility, ensure that this device can grow with your network. This scalability is invaluable for businesses and organizations that anticipate expansion or have fluctuating network requirements.

In a dynamic environment, having a network device that can adapt to changing needs is a tremendous advantage. The ability to connect various SFP+ modules allows for flexibility in network design, enabling the integration of different types of devices and connections without the need to purchase additional equipment.

Main Specifications for the Cisco C9800-40-K9

Technical Information of the Catalyst 9800 Wireless Controller

  • Maximum Number of Access Points: 2000
  • Wireless LANs Supported: 4096
  • VLANs Supported: 4096
  • Data Link Protocols: Gigabit Ethernet, 10 Gigabit Ethernet, IEEE 802.11ac Wave 2, IEEE 802.11ac Wave 1


  • 1 x Console - RJ-45
  • 1 x Management - RJ-45
  • 1 x USB - Type A
  • 2 x USB - Type A
  • 1 x Redundancy
  • 4 x 10GB Ethernet - SFP+

Remote Management Protocols

  • SNMP 1
  • RMON
  • Telnet
  • SNMP 3
  • SNMP 2c
  • HTTP
  • TFTP
  • SSH

In summary, the Cisco C9800-40-K9 Catalyst 9800 is a versatile and high-performance network device that plays a crucial role in managing modern networks. With its 10GB Ethernet ports, SFP+ compatibility, and support for Wi-Fi 5 technology, it offers the speed, scalability, and efficiency needed to meet the demands of various industries and applications.

This network device simplifies network administration, enhances security, and ensures a seamless experience for users. Whether you're running a large enterprise, an educational institution, a healthcare facility, or a retail store, the Cisco Catalyst 9800 can meet your networking needs.

The Cisco C9800-40-K9 Catalyst 9800 is a step toward building a robust, high-performance network that can adapt to the evolving demands of the digital age. It's a critical component for organizations looking to provide reliable and secure connectivity for their users and devices.

Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

About Refurbished Products

Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.


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ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

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