Cisco CISCO2921K9 3 Ports Router
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Cisco CISCO2921/K9 256MB Router 3 Ports SFP Ethernet WAN Refurbished

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Part Number#: CISCO2921/K9
List Price was: $846.15
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Short Description:
CISCO2921/K9 2921 Integrated Services Router 3 Ports 4 x HWIC 256 Megabyte (MB) Small Form-Factor Pluggable (SFP) 3 x PVDM, 2 x Services Module, 2 x Compact Flash Card 3 x 10/100/1000Base-T Network WAN Router | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days
Product Overview of the Cisco CISCO2921/K9 3 Ports Router

The Cisco CISCO2921/K9 2921 Integrated Services 256 MB Router is a versatile and powerful networking device designed to meet the demands of modern businesses and organizations. In this comprehensive guide, we will delve into the various aspects of this router, from its key features to its hardware specifications. Whether you're considering purchasing one for your organization or just curious about its capabilities, this article will provide you with all the information you need to know.

The Cisco CISCO2921/K9 2921 Integrated Services Router is a part of Cisco's renowned 2900 series routers. These routers are known for their robust performance and wide range of features that cater to the needs of small and medium-sized businesses as well as larger enterprises. They are designed to provide a seamless and secure networking experience, making them an essential part of any modern IT infrastructure.

Key Features The Cisco 3 Ports Router

Let's explore some of the key features that make the Cisco CISCO2921/K9 2921 Integrated Services Router stand out:

Three Ports

The router comes equipped with three ports, allowing for greater connectivity options. These ports can be used for various purposes, such as connecting to local area networks (LANs), wide area networks (WANs), and more.

Four HWIC Slots

The inclusion of four High-Speed WAN Interface Card (HWIC) slots gives users the flexibility to add expansion cards to meet specific networking requirements. This modularity allows for a customized approach to networking, as different HWICs can be added as needed.

256 Megabytes (MB) of RAM

The Cisco CISCO2921/K9 2921 router is equipped with 256 MB of RAM, which is crucial for efficient data processing and handling complex networking tasks. With this ample amount of memory, the router can handle multiple tasks simultaneously without slowing down.

Small Form-Factor Pluggable (SFP)

The router is equipped with Small Form-Factor Pluggable (SFP) slots, which are commonly used for connecting to fiber-optic networks. SFPs provide flexibility and high-speed data transmission, making them ideal for demanding network environments.

Three PVDM Modules

Packet Voice DSP Modules (PVDM) are essential for voice and video communications. With three PVDM modules, the Cisco CISCO2921/K9 2921 router can handle various voice and video applications, ensuring clear and reliable communication.

Two Services Modules

Services modules are designed to extend the functionality of the router. The inclusion of two service modules in the CISCO2921/K9 enhances its capabilities, allowing for additional features and services to be integrated into the network.

Two Compact Flash Card Slots

Compact Flash (CF) cards are used for storage and data backup purposes. The two CF card slots in this router provide redundancy and allow for easy configuration and software updates.

Three 10/100/1000Base-T Network Ports

In addition to the three ports mentioned earlier, this router features three 10/100/1000Base-T Network ports, commonly known as Gigabit Ethernet ports. These high-speed ports offer fast data transfer and are essential for connecting to the local network.

Hardware Specifications of the Router

To have a deeper understanding of the Cisco CISCO2921/K9 2921 router, it's important to explore its hardware specifications in detail:


The router is powered by a high-performance processor that ensures efficient data routing and processing. A robust processor is essential for handling the demands of modern networking, from data traffic to security and advanced applications.

Flash Memory

Flash memory is used for storing the router's operating system and configuration files. The CISCO2921/K9 comes with 256 MB of flash memory, providing ample storage capacity for the router's firmware and configurations.


In addition to the mentioned ports and slots, the Cisco CISCO2921/K9 2921 router features various interfaces for connection to other devices and network components. These interfaces include USB, serial, auxiliary, and console ports.

VPN Support

Virtual Private Networks (VPNs) are crucial for secure remote access and data encryption. The CISCO2921/K9 router supports VPNs, allowing organizations to establish secure connections for remote users and branch offices.

Security Features

Security is a top priority for any networking device. The router includes a wide range of security features, such as firewall capabilities, intrusion prevention, and encryption protocols, to protect the network from threats and unauthorized access.

Quality of Service (QoS)

The router's Quality of Service (QoS) capabilities ensure that critical applications and services receive priority in terms of bandwidth and network resources. This is essential for maintaining a high-quality user experience in data, voice, and video applications.

Power Supply

The router comes with a built-in power supply, ensuring that it can operate without the need for external power sources. This feature adds to the router's reliability and reduces the risk of network downtime.


The Cisco CISCO2921/K9 2921 router is designed to be rack-mounted, which is common in data center and networking environments. Rack mounting allows for efficient use of space and better organization of networking equipment.

Use Cases of 256MB Router

Understanding the various use cases for the Cisco CISCO2921/K9 2921 Integrated Services Router is essential for assessing whether it is the right fit for your organization. Here are some common scenarios where this router shines:

Small and Medium-Sized Businesses

For small and medium-sized businesses (SMBs), the Cisco CISCO2921/K9 2921 router is an excellent choice. Its modularity and scalability allow SMBs to start with a basic setup and expand as their networking requirements grow. It provides a cost-effective solution that can handle the evolving needs of the business.

Branch Offices

Many organizations have branch offices that require reliable and secure connectivity to the main data center. The CISCO2921/K9 router is ideal for this scenario, offering robust features for branch-to-main-site connectivity and remote access.

Voice and Video Communications
The router's support for voice and video applications, coupled with its PVDM modules, makes it a perfect choice for organizations that rely heavily on these communication mediums. Whether it's for video conferencing, VoIP calls, or streaming, this router can ensure the quality and reliability of such applications.
Data Center Connectivity

In data center environments, network reliability and performance are critical. The Cisco CISCO2921/K9 2921 router can be used for connecting various data center components, including servers, storage devices, and switches. Its high-speed ports and support for Gigabit Ethernet make it suitable for data center applications.

Benefits of the Cisco CISCO2921/K9 2921 Router

Now that we've covered the router's features and hardware specifications, let's discuss the benefits it offers to organizations:


The router's versatility is one of its primary advantages. It can adapt to a wide range of networking scenarios and can be customized to meet specific requirements, making it a valuable asset for organizations with diverse networking needs.


The modularity of the Cisco CISCO2921/K9 2921 router allows for easy expansion and upgrade. Organizations can add HWICs, service modules, and other components as their network evolves, thus reducing the need for full-scale replacements.

High Performance

The router's robust hardware, including its processor, RAM, and flash memory, ensures high performance even in demanding network environments. It can handle a multitude of tasks simultaneously, guaranteeing a smooth user experience.

Secure Networking

Security is paramount in today's digital landscape. The router's comprehensive security features, including firewall capabilities and VPN support, provide organizations with the tools needed to protect their networks and sensitive data.

Quality of Service

The Quality of Service (QoS) features in the CISCO2921/K9 router enhance the performance of critical applications. This ensures that voice, video, and other latency-sensitive services run smoothly and without interruptions.


The inclusion of features like a built-in power supply and rack-mount compatibility increases the router's reliability. This means less downtime and higher availability for the network.

General Information about this Cisco CISCO2921/K9
  • Manufacturer: Cisco
  • Model Number or SKU# CISCO2921/K9
  • Product Type: Router
Technical Information of 3 Ports Router
  • Storage Capacity Ports: 3
  • Number of Total Expansion Slots: 12
  • Expansion Slot Type: HWIC
  • Expansion Slot Type: SFP (mini-GBIC)
  • Expansion Slot Type: PVDM
Network and Communication for Integrated Services Router
  • Network Technology: 10/100/1000Base-T
  • Ethernet Technology: Gigabit Ethernet
  • Standard Memory: 512 MB
  • Flash Memory: 256 MB

In summary, the Cisco CISCO2921/K9 2921 Integrated Services Router is a powerful networking device that offers a wide range of features and capabilities. Its versatility, modularity, high performance, and comprehensive security features make it an ideal choice for various networking scenarios, from small businesses to data center environments.

When setting up and configuring this router, following the proper steps and taking security precautions is essential to ensure smooth operation and network reliability. Additionally, being prepared for common issues and knowing how to troubleshoot them will help maintain a stable and efficient network.

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.

Here, you can check more available conditions of your desired product CISCO2921/K9 at a competitive price. We are trying our best to meet your needs on the enterprise-level computer, server, data centre, and networking hardware. You are welcome to ask our live chat or get live representative support over the phone.


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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?

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(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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