Cisco CISCO3925K9 3 Port Ethernet Router
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Cisco CISCO3925/K9 3 Ports Router Ethernet ISR 3925 Factory New

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Part Number#: CISCO3925/K9
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Short Description:
CISCO3925/K9 3925 Router 3 Ports Fast Ethernet 10/100/1000Base-T IOS IP Base 3U External Integrated Service Router (ISR) | Made by Cisco | New Factory Sealed
Product Condition:
New Retail Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days
Product Overview of the Cisco Ethernet Router

In the world of networking, Cisco has established itself as a leading provider of high-quality routers and networking equipment. One such product is the Cisco CISCO3925/K9 3 Ports Router Ethernet ISR 3925. In this comprehensive guide, we will delve into the key features, specifications, benefits, and use cases of this router. Whether you are an IT professional, a business owner, or someone interested in understanding networking technology, this guide aims to provide you with a detailed overview of the Cisco CISCO3925/K9.

Cisco CISCO3925/K9

The Cisco CISCO3925/K9 is a part of Cisco's Integrated Services Router (ISR) series, known for its versatility and performance. The '3925' in the model name refers to its specific model number. Let's break down the key components of this router:

Cisco ISR Series

Cisco ISR routers are renowned for their integrated services, combining routing, security, and other features in a single platform. This integration simplifies network management and enhances efficiency.

Quality of Service (QoS) Capabilities

The Cisco 3925 ISR Router (CISCO3925/K9) is equipped with advanced Quality of Service (QoS) capabilities that allow it to prioritize and manage network traffic effectively. These capabilities are designed to ensure that critical network applications and services receive the bandwidth and resources they need, while less important traffic is managed accordingly.

One of the key QoS features of the CISCO3925/K9 is Class-Based Weighted Fair Queuing (CBWFQ). This feature allows administrators to assign different levels of priority to different types of traffic, based on the class of service. For example, voice traffic can be given a higher priority than email traffic, ensuring that voice calls are not impacted by network congestion.

The CISCO3925/K9 also supports Low Latency Queuing (LLQ), which allows administrators to assign guaranteed bandwidth to specific traffic classes. This can help to ensure that critical applications and services, such as voice and video, receive the bandwidth they need, even during periods of high network congestion.

In addition, the CISCO3925/K9 supports several other QoS features, including:

Traffic shaping: Allows administrators to limit the amount of bandwidth that a specific traffic class can consume.

Policing: Enables administrators to control the rate of traffic entering the network, by setting bandwidth limits and dropping any traffic that exceeds those limits.

Congestion management: Helps to prevent network congestion by using techniques such as random early detection (RED) and weighted random early detection (WRED).

Power over Ethernet (PoE) Support on the CISCO3925/K9

The Cisco 3925 Integrated Services Router (CISCO3925/K9) supports Power over Ethernet (PoE) for powering connected devices. PoE allows devices to receive both power and data over a single Ethernet cable, eliminating the need for separate power cables. This can greatly simplify deployment and reduce the overall cost of the network.

The CISCO3925/K9 supports both IEEE 802.3af and IEEE 802.3at PoE standards. IEEE 802.3af provides up to 15.4 watts of power per port, while IEEE 802.3at provides up to 30 watts of power per port. This allows the router to power a wide range of PoE-enabled devices, including wireless access points, IP phones, and security cameras.

The CISCO3925/K9 also supports PoE power management, allowing administrators to set power budgets and monitor power usage on a per-port basis. This can help to prevent power overloads and ensure that the router is providing sufficient power to all connected devices.

In addition, the CISCO3925/K9 supports Cisco EnergyWise, a technology that enables the router to monitor and manage the power consumption of connected devices. This can help to reduce energy costs and improve the overall energy efficiency of the network.

Model Specification CISCO3925/K9

3 Ports: This router is equipped with three ports, facilitating multiple connections simultaneously. Ports are essential for linking various devices and expanding the network.

Ethernet Capability: The inclusion of Ethernet ports enables high-speed wired connections, ensuring a stable and reliable network for data transmission.

ISR 3925: The model '3925' signifies its specific configuration and capabilities within the ISR series. Understanding this nomenclature helps users identify the router's capabilities at a glance.

Key FeaturesRouting Capabilities

The Cisco3925/K9 router excels in routing tasks, directing data between different networks efficiently.

Advanced routing protocols enhance the router's ability to make intelligent decisions about the most efficient path for data transmission.

Ethernet Connectivity

With three ports, this router supports multiple Ethernet connections, accommodating various devices and network expansions.

Ethernet connectivity ensures fast and reliable data transfer, vital for smooth operations in business and home environments.

Integrated Services

The ISR series is known for integrating various services into a single platform, reducing complexity, and simplifying network management.

Integrated security features protect against cyber threats, making it an ideal choice for secure network deployments.

Technical SpecificationsProcessor and Memory

The Cisco3925/K9 is equipped with a powerful processor, ensuring efficient data processing and routing.

Ample memory capacity supports the storage of routing tables and other critical data, contributing to the router's overall performance.

Form Factor

The physical design of the router, known as its form factor, is an important consideration for installation and space requirements.

Understanding the form factor helps users plan for the router's placement in their network infrastructure.


Compatibility with various networking protocols and technologies ensures the router can seamlessly integrate into diverse network environments.

Check compatibility with existing network components to avoid issues during installation and operation.

Benefits of Cisco CISCO3925/K9


The router's design allows for scalability, accommodating the growing needs of a network as demands increase.

Scalability is crucial for businesses and organizations experiencing expansion and evolving networking requirements.


Cisco is renowned for producing reliable networking equipment, and the CISCO3925/K9 is no exception.

High-quality components and advanced engineering contribute to the router's reliability, minimizing downtime and ensuring continuous connectivity.


Integrated security features protect against cyber threats, including firewall capabilities and encryption protocols.

Robust security is essential in today's interconnected world, and the CISCO3925/K9 provides a secure foundation for data transmission.

Use Cases

Enterprise Networks

Large enterprises can benefit from the router's scalability and advanced features, supporting complex network infrastructures.

The integrated services make it a suitable choice for managing various tasks within an enterprise environment.

Small to Medium-sized Businesses (SMBs)

SMBs can leverage the Cisco3925/K9 for its reliability and scalability, adapting to their growing networking needs.

The router's ease of use and integrated services make it a practical solution for SMBs with limited IT resources.

General Information about the Cisco CISCO3925/K9
  • Manufacturer: Cisco
  • Model Number or SKU# CISCO3925/K9
  • Product Series: 3900
  • Product Model: 3925
  • Product Type: Router
  • Total Number of Ports: 3
  • USB: Yes
  • Management Port: Yes
  • Number of Broadband (RJ-45) Ports: 3
I/O Expansions
  • Number of Total Expansion Slots: 15
  • Expansion Slot Types:
  • HWIC
  • PVDM
  • SFP (mini-GBIC)
Network & Communication
  • Network Technology: 10/100/1000Base-T
  • Ethernet Technology: Gigabit Ethernet
  • Standard Memory: 1 GB
  • Maximum Memory: 2 GB
  • Memory Technology: DRAM
  • Flash Memory: 256 MB
  • Memory Card Supported: CompactFlash (CF) Card
Power Description
  • Input Voltage: 110 V AC
  • Input Voltage: 220 V AC
  • Power Source: Power Supply
  • Redundant Power Supply: Yes

In short, the Cisco CISCO3925/K9 3 Ports Router Ethernet ISR 3925 is a robust networking solution offering advanced features, scalability, and security. Whether deployed in large enterprises or small to medium-sized businesses, this router provides a reliable foundation for modern network infrastructures. By understanding its key features, technical specifications, and installation processes, users can harness the full potential of the Cisco3925/K9 to meet their networking needs.

Product Condition:
New Retail Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

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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.

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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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