Cisco ISR4431-V/K9

Overview

The Cisco ISR4431-V/K9 is a powerful integrated services router designed to meet the demanding needs of modern wide area network (WAN) communications. It features a multicore architecture and internal service planes that deliver application-aware services to enhance network performance and efficiency. Equipped with 4GB of DDR3 RAM and 8GB of flash memory, both expandable, this router supports a variety of network protocols including MPLS VPNs, Ethernet, and Gigabit Ethernet, making it a versatile choice for enterprise branch offices and data centers.

Built on Cisco’s high-bandwidth backplane, the ISR 4431 enables fast communication between modules and supports modular interface upgrades without disrupting network operations. Security is a priority with secure boot and hardware-based authentication, while dual power supply support ensures business continuity through redundancy. This rack-mountable device consolidates routing, switching, and WAN optimization into a single platform, reducing IT overhead and total cost of ownership.

Key features

• Multicore architecture with internal service planes for improved application-aware network services
• Secure boot and hardware authentication to protect against unauthorized code execution
• Dual integrated power supplies provide redundancy to maintain uptime during power failures
• Modular design allows network interface upgrades without interrupting operations
• Supports a wide range of network protocols including MPLS VPNs, Ethernet, and Gigabit Ethernet
• Four SFP ports and multiple RJ-45 connections offer flexible options for network connectivity
• Expandable memory and flash storage to accommodate growing network demands and software needs

Key specs

• Memory: 4 GB DDR3 RAM, expandable to 16 GB
• Storage: 8 GB flash memory, expandable to 32 GB
• Network interfaces: 4 SFP ports, multiple RJ-45 connections
• Power: Dual integrated power supply support
• Architecture: Multicore with internal service planes
• Supported protocols: MPLS VPNs, Ethernet, Gigabit Ethernet
• Form factor: Rack-mountable

Connectivity and compatibility

This router offers versatile connectivity options suitable for complex enterprise networks. The four SFP ports support fiber connections for high-speed data transfer, while multiple RJ-45 ports provide compatibility with standard Ethernet devices. Its support for MPLS VPNs enables secure and efficient routing across wide area networks, making it adaptable to various network architectures and service provider environments.

Performance and reliability

The ISR 4431 is engineered for high performance and reliability in demanding network environments. Its multicore processor and internal service planes optimize traffic handling and application performance. The secure boot process and hardware authentication safeguard the device from unauthorized software, while dual power supplies ensure continuous operation even during power disruptions. This combination of features supports critical business applications and helps maintain network stability.

Ideal uses and environments

This router fits well in enterprise branch offices and data centers that require a consolidated platform for routing, switching, and WAN optimization. It is a strong choice for IT teams looking to reduce complexity and costs by integrating multiple network services into one device. Its modular design and expandable memory make it suitable for growing networks that need flexibility and scalability without sacrificing security or uptime.

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