Cisco C921-4P Integrated Services Router
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Cisco C921-4P 921 Series Integrated Services Router Factory New

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Part Number#: C921-4P
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Short Description:
C921-4P 921 Series 6 Ports 1000Base-X Gigabit Ethernet Rack Mountable Integrated Services Router | Made by Cisco | New Factory Sealed
Product Condition:
New Retail Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

Understanding Integrated Services Routers

Before diving into the details of the Cisco C921-4P, it's essential to understand what an Integrated 6 Ports Services Router (ISR) is. An ISR is a multifunctional networking device that combines the features of a traditional router with additional capabilities, such as security, voice, and wireless services. ISRs are a crucial component of modern networks as they provide an all-in-one solution for various networking needs.

Key Features of the Cisco C921-4P Router

The Cisco C921-4P router comes equipped with an array of features that cater to the diverse needs of businesses. These features include:

Gigabit Ethernet Ports

The C921-4P router boasts six 1000Base-X Gigabit Ethernet ports. Gigabit Ethernet is the standard for high-speed, reliable network connectivity. These ports allow for faster data transmission, making it ideal for bandwidth-intensive applications and large data transfers.

Power over Ethernet (PoE) Support

One notable feature of the Cisco C921-4P is its PoE support. This means that it can provide power to connected devices, such as IP phones, cameras, or access points, using Ethernet cables. PoE eliminates the need for separate power sources and simplifies the deployment of networked devices.

Rack-Mountable Design

The router's rack-mountable design is perfect for businesses that require an organized and space-efficient network setup. It can be easily integrated into standard network racks, saving valuable floor space.

Advanced Security

Cisco is renowned for its commitment to network security. The C921-4P router includes robust security features to safeguard your network from threats. These features may include firewall capabilities, VPN support, and intrusion detection.

Quality of Service (QoS)

QoS features in the Cisco C921-4P router enable network administrators to prioritize specific types of traffic. This ensures that critical applications, like voice and video, receive the necessary bandwidth and operate without interruption.

High Performance

The router is built to handle the demands of modern businesses. Its high-performance capabilities ensure smooth and reliable network operations, even in high-traffic environments.

Network Management and Security

The Cisco 921 Series Integrated Services Router (ISR) is a compact, secure router designed for small to medium-sized businesses. It comes with built-in security features and supports advanced networking capabilities, making it an ideal choice for network management and security.

Here are some key network management and security features of the Cisco 921 ISR:

  • Configuration Management: The Cisco 921 ISR can be easily configured and managed through a web-based graphical user interface (GUI) or a command-line interface (CLI). It also supports Simple Network Management Protocol (SNMP) for network monitoring and management.
  • Quality of Service (QoS): The router supports QoS features such as traffic shaping, traffic policing, and priority queuing, allowing network administrators to prioritize critical traffic and ensure the smooth operation of the network.
  • Virtual Private Network (VPN): The Cisco 921 ISR supports both site-to-site and remote-access VPNs, providing secure access to the network for remote employees or branch offices. It supports a range of VPN protocols such as IPsec, SSL, and L2TP.
  • Firewall: The router comes with a built-in firewall that can be configured to block unauthorized access and prevent network attacks. It supports access control lists (ACLs), stateful packet inspection, and other security features to protect the network from intruders.
  • Intrusion Prevention System (IPS): The Cisco 921 ISR can be configured with an IPS module that can detect and prevent network attacks such as DoS attacks, worm outbreaks, and port scans.
  • Network Address Translation (NAT): The router supports NAT features such as port forwarding, static NAT, and dynamic NAT, which can be used to map private IP addresses to public IP addresses and vice versa, allowing for secure communication between different networks.
  • DHCP Services: The Cisco 921 ISR can act as a DHCP server, providing IP addresses to clients on the network. It also supports DHCP relay, which allows DHCP requests to be forwarded to a DHCP server on a different network.

Benefits of the Cisco C921-4P Router

Investing in the Cisco C921-4P 921 Series Integrated Services Router offers several benefits for businesses:

Enhanced Network Performance

With Gigabit Ethernet support, the router delivers exceptional network performance, ensuring that data flows seamlessly and without delays. This is crucial for organizations that rely on fast and reliable connectivity.

Cost Efficiency

The router's PoE support simplifies the setup of devices that require power, reducing the need for additional power sources and cabling. This translates into cost savings for businesses.

Improved Network Management

The C921-4P comes with advanced network management features that allow administrators to monitor and control the network more effectively. This can help optimize resource allocation and improve overall network efficiency.

Network Security

Cisco is renowned for its commitment to network security. The router's security features protect against various threats and vulnerabilities, ensuring that sensitive data remains safe and secure.

Reliability Information

The Cisco 921 Series Integrated Services Router (ISR) is a reliable networking device designed to provide a range of services, including Internet access, security, and voice functionality for small businesses. Some of the features that contribute to the reliability of the C921-4P router include:

  • Redundant power supplies: The router includes two power supplies, which can be configured to provide redundant power to the router in the event that one power supply fails.
  • Redundant WAN connections: The router includes two WAN (Wide Area Network) ports, which can be used to connect to multiple Internet service providers (ISPs) for added redundancy.
  • Quality of Service (QoS): QoS allows you to prioritize different types of traffic, ensuring that mission-critical applications receive the necessary bandwidth.
  • Advanced security features: This Item router includes a range of security features, such as a firewall and VPN (Virtual Private Network) support, to protect your network from external threats.

Power Options and Redundancy

The Cisco 921 Series Integrated Services Router (ISR) comes with a variety of power options and redundancy features that provide high availability and reliability to the network infrastructure. Here are some key power options and redundancy features of the Cisco 921 ISR:

  • Power over Ethernet (PoE): The Cisco 921 ISR supports PoE, which allows network administrators to power PoE-enabled devices such as IP phones, wireless access points, and IP cameras directly from the router, eliminating the need for separate power sources.
  • External Power Supply: The router can also be powered using an external power supply, which can be either AC or DC. This provides flexibility in terms of power source and ensures that the router remains operational in case of a power outage.
  • Power Redundancy: The Cisco 921 ISR supports power redundancy through the use of a dual power supply unit (PSU) configuration. This ensures that the router remains operational even if one of the PSUs fails.
  • Redundant WAN Connectivity: The router supports redundant WAN connectivity through the use of dual WAN ports. This allows for automatic failover to the backup WAN link in case the primary link fails, ensuring that the network remains operational.
  • Redundant VPN Connectivity: The Cisco 921 ISR also supports redundant VPN connectivity through the use of dual VPN tunnels. This allows for automatic failover to the backup VPN tunnel in case the primary tunnel fails, providing uninterrupted and secure access to the network.
  • Hot Standby Router Protocol (HSRP): HSRP is a Cisco proprietary protocol that provides redundancy for IP networks by allowing multiple routers to share a virtual IP address. The Cisco 921 ISR supports HSRP, allowing for automatic failover to a backup router in case the primary router fails.


  • Processor: The router is powered by a powerful processor, ensuring high performance for data processing and routing tasks.
  • Memory: It comes with X GB of RAM and Y GB of flash memory, providing the resources needed for efficient operation and future firmware upgrades.

Security Features

  • Firewall: The router includes an advanced firewall with intrusion prevention and content filtering capabilities to protect the network from external threats.
  • Virtual Private Network (VPN): It supports VPN protocols, allowing secure remote access and data transmission over the internet.

Main Information about this Cisco C921-4P

  • Manufacturer: Cisco
  • Model Number or SKU# C921-4P
  • Product Series: 900
  • Type: Networking
  • Product Type: Integrated Services Router

Ports for Integrated Services Router

  • Total Number of Ports 6
  • Management Port Yes

Network & Communication of 6 Ports Router

  • Network Technology 1000Base-X
  • Ethernet Technology Gigabit Ethernet

Finally, The Cisco C921-4P Integrated Services Router is a versatile and powerful networking device that offers a wide range of features and benefits. It's suitable for small and medium-sized businesses, data centers, remote offices, and various other network scenarios. With its high-speed Gigabit Ethernet ports, integrated services, and security features, the router can help businesses achieve reliable and efficient networking.

While setting up the router may require some technical expertise, the benefits it provides in terms of network efficiency, scalability, and security make it a valuable addition to any network infrastructure. By following best practices in installation, configuration, and maintenance, you can ensure the Cisco C921-4P serves your network needs effectively and reliably.

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

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