Cisco C921-4P 

The Cisco 921-4P router is an Integrated Services Router (ISR), designed to deliver high-performance, secure internet access and wireless services tailored for small branch offices and service provider-managed environments. It integrates security and threat defense, combining dual Gigabit Ethernet WAN ports and a 4-port managed Gigabit Ethernet LAN switch that supports multiple device connectivity. This router simplifies Ethernet WAN deployment with comprehensive Operations, Administration, and Maintenance (OA&M), SLA monitoring, and remote configuration capabilities through Cisco IOS Software and web-based tools, providing full control and visibility at the remote site.

KEY FEATURES

• Dual Gigabit Ethernet WAN ports and a 4-port managed Gigabit Ethernet LAN switch

• Integrated USB 2.0 port for expanded functionality

• Redundant WAN connections with failover and load balancing supported via VRRP, HSRP, and Multigroup HSRP protocols for high availability

• Integrated application inspection, firewall, and IPsec VPN encryption (3DES and AES) with hardware acceleration for enhanced security and performance

• Support for FlexVPN and next-generation encryption technologies

• Unified management for wired and wireless networks from a centralized console

• Advanced Cisco IOS software with IP routing protocols (OSPF, BGP, EIGRP, MPLS), QoS, VLANs, 802.1X security, and network foundation protection

• Remote management support with separate console ports

SPECIFICATIONS OF CISCO C921-4P

PRODUCT DETAILS

• Brand: Cisco
• Series: Cisco 900 Series Integrated Services Router (ISR)
• Model Number: C921-4P
• Product Type: Router / Integrated Services Router (ISR)
• Item weight: 1.2 kg
• Product Dimensions: 48.18 X 229.6 X 241.3 mm
• Color: Black / Dark grey
• Manufacturer: Cisco Systems, Inc

⇒TECHNICAL DATASHEET

PERFORMANCE

The Cisco 921-4P is designed to maintain consistent application performance running multiple services simultaneously without degradation. It supports up to 50 recommended users, utilizes advanced routing and QoS features to optimize traffic flow and reliability, and delivers up to 250 Mbps IPsec throughput for secure VPN connections.

POWER CONSUMPTION

This router device includes an internal universal AC power supply (100–240 VAC, 50–60 Hz), enhancing deployment flexibility and energy efficiency without needing an external adapter. While exact power consumption figures are not explicitly detailed, the internal power design suggests optimized use for its size and function.

RELIABILITY

It ensures high availability features such as redundant WAN links, dynamic failover technologies (VRRP, HSRP, MHSRP), and robust DSL technologies with noise protection measures (Impulse Noise Protection, seamless rate adaptation). These ensure stable and continuous operation suited for branch office demands.

VERSATILITY

This router supports multiple WAN interfaces, strong LAN switching capabilities, flexible Cisco IOS licensing options (IP Base, Application Experience, Security), and LTE wireless WAN support through compatible models. It supports both IPv4/IPv6, offers comprehensive security, QoS, and unified wired-wireless management, enabling it to adapt to diverse branch office networking environments.

CONCLUSION

The Cisco 921-4P router is a reliable, secure, and versatile edge device ideal for enterprise small branch offices and managed service provider CPE deployments. Its robust performance, comprehensive security features, flexible connectivity options, and ease of management make it well-suited to deliver consistent network services and protect against evolving threats, ensuring business continuity and operational efficiency