Cisco C1-CISCO4321/K9 Services Router 2 Ports Networking Router
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C1-CISCO4321/K9 Cisco 2 Gigabit Ethernet Router Refurbished

Availability: In Stock
Part Number#: C1-CISCO4321/K9
List Price was: $14134.62
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Short Description:
C1-CISCO4321/K9 4321 / 4000 Series 2 Gigabit Ethernet 4GB DRAM, 4GB Flash, Router | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

Introduction to the Ethernet Router

The Cisco 4321/K9 (Cisco 4321 Integrated Services Router) is a powerful and versatile router designed for small to medium-sized businesses and enterprise branch offices. The C819G-U-K9 C1 variant is part of the 4000 series of integrated service routers and is built to provide advanced security, voice, and video capabilities, as well as high-speed WAN connectivity. The router features a modular design that enables easy expansion and upgrades, and it can support a wide range of network applications and services.

The Cisco 4321/K9 supports Cisco IOS XE software, which is a powerful and feature-rich operating system that offers advanced security, automation, and programmability features. This allows organizations to simplify and secure their networks, and enables them to take advantage of the latest networking technologies. Additionally, the router also supports various VPN technologies like IPsec, DMVPN, and SSL VPN, which provides an added layer of security to remote access and site-to-site connectivity.

The Cisco 4321/K9 also has a built-in 4G LTE module and support for the optional embedded cellular modem. This allows the router to connect to cellular networks and provide an additional WAN link for redundancy or as a backup in case of a primary link failure.

Remote Management and Monitoring

The Cisco 4321/K9 (C819G-U-K9 C1 variant) provides several options for remote management and monitoring, including:

  • Cisco IOS CLI (Command-Line Interface): The Cisco IOS CLI allows administrators to remotely access and configure the router through a terminal emulator, such as Telnet or SSH. This allows administrators to perform tasks such as configuring interfaces, routing protocols, and security policies.
  • Cisco Network Assistant (CNA): Cisco Network Assistant is a web-based management tool that allows administrators to manage multiple Cisco devices from a single interface. It provides a simplified, wizard-driven interface for configuring and monitoring the router, and can be used to perform tasks such as monitoring device status, configuring security policies, and managing wireless networks.
  • Cisco Prime: Cisco Prime is a comprehensive network management platform that allows administrators to manage multiple Cisco devices from a single interface. It provides advanced monitoring and troubleshooting capabilities, including real-time performance monitoring, device and network-wide event correlation, and automated troubleshooting.
  • Cisco Smart Software Manager (CSSM): Cisco Smart Software Manager is a cloud-based platform that provides a unified view of Cisco software and licenses across multiple devices. It allows administrators to easily manage software versions and updates, and to view and manage license usage.
  • SNMP (Simple Network Management Protocol): The Cisco 4321/K9 supports SNMP, which allows administrators to monitor the router's performance and system status remotely. SNMP-enabled network management systems can be used to collect statistics on various aspects of the router's operation, such as interface statistics, CPU and memory usage, and error conditions.

All of these options provide administrators with the ability to remotely manage and monitor the Cisco 4321/K9, allowing them to quickly and easily identify and resolve network issues, and to ensure that the network is running at peak performance.

Troubleshooting and Maintenance

The Cisco 4321/K9 (C819G-U-K9 C1 variant) is a reliable and robust router, but like any network device, it may require troubleshooting and maintenance from time to time. Here are some common troubleshooting and maintenance tasks that can be performed on the router:

  • Checking the status of interfaces and routing protocols: Administrators can use the Cisco IOS CLI or web-based management tools to check the status of interfaces and routing protocols on the router. This can help identify any configuration errors or connectivity issues.
  • Monitoring system logs: The router stores system logs that can be used to troubleshoot issues and identify potential problem areas. Administrators can view these logs through the Cisco IOS CLI or web-based management tools, and can use them to identify and resolve network issues.
  • Updating software and firmware: Cisco releases software and firmware updates for the router on a regular basis. These updates can include bug fixes, security patches, and new features. Administrators can use Cisco Prime or Cisco Smart Software Manager to manage software and firmware updates.
  • Backing up the configuration: Administrators should regularly back up the router's configuration to protect against accidental configuration changes or loss of data. The configuration can be backed up through the Cisco IOS CLI, web-based management tools, or using a network management system.
  • Physically inspecting the router: Regularly inspecting the router for physical damage, dust accumulation, and other issues can help prevent problems before they occur. This includes checking the power supply and fans, and ensuring that the router is properly ventilated.
  • Scheduling regular maintenance: Regular maintenance can help prevent problems before they occur. This could include tasks such as checking for and applying software updates, checking logs, and inspecting the router's physical condition. Scheduling regular maintenance can help administrators proactively identify and resolve issues before they become critical.

By performing these troubleshooting and maintenance tasks on a regular basis, administrators can ensure that the Cisco 4321/K9 router is running at peak performance, and can quickly and easily resolve any issues that may arise.

General Information

  • Manufacturer : Cisco
  • MPN : C1-CISCO4321/K9
  • Product Type : Router

Technical Information

  • Interface Types: USB 2.0, Ethernet RJ45, SFP, GBIC
  • Electrical Interface: Ethernet Gigabit - 1Gbps
  • On-Board Cache: 4GB
  • Bays/Ports/Slots: 2
  • U Height: 1U
  • Wattage/VA: 260W
  • Voltage: 110-240V Multi

Interfaces / Ports

  • Total Number of Ports 2
  • Management Port Yes

I/O Expansions

  • Number of Total Expansion Slots 4

Network & Communication

  • Network Technology 10/100/1000Base-T
  • Ethernet Technology Gigabit Ethernet
  • VoIP Supported Yes

Power Description

  • Redundant Power Supply Supported No

Dimensions & Weight

  • Compatible Rack Unit 1U
  • Form Factor Rack-mountable
  • Wall Mountable
  • Height 1.8 Inch
  • Width 14.6 Inch
  • Depth 11.6 Inch
  • Weight (Approximate) 9.14 Lbs
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 C1-CISCO4321/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?

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).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
Final Sale items are non-returnable/refundable in any situation. Any question? please ask our team before the shipment.

Important notes:

We can provide additional warranty service/support for any product you purchase from us if you need additional warranty coverage before finalizing the order from ALLHDD.Com. You need to ask in live chat/help or call us for more information.

Individual product warranty mentioned on each item product description page/detail page.

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Important notes:

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