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Cisco ISR4351/K9 - Integrated Services Router

Part Number: ISR4351/K9
Manufacturer: Cisco Systems


The Cisco ISR4351/K9 is a high-performance Integrated Services Router designed to deliver superior connectivity and security for medium to large enterprises. As part of the Cisco 4000 Series, the ISR4351/K9 combines advanced routing capabilities with integrated services such as security, voice, and application optimization. This router provides a scalable solution to support evolving network demands and offers high availability, reliability, and enhanced features to ensure a seamless and secure network environment.

Key Features

  • High-Performance Routing: Equipped with Cisco's advanced routing protocols and technologies, including OSPF, EIGRP, BGP, and MPLS, to ensure robust and efficient network operations.
  • Integrated Services: Combines multiple services in a single platform, including advanced security (firewall, VPN, and intrusion prevention), voice, and application performance optimization.
  • Modular Design: Features modular slots for expansion and customization with additional network modules, WAN interfaces, and service modules to meet specific business needs.
  • Scalability: Supports high throughput and scalable performance with up to 200 Mbps of IPsec VPN throughput and up to 1 Gbps of aggregated throughput, allowing for future growth and high-demand applications.
  • Advanced Security: Offers built-in security features such as Cisco's Advanced Malware Protection (AMP), URL filtering, and secure network segmentation to protect against threats and ensure data integrity.
  • High Availability: Includes redundancy features such as dual power supplies and fans to provide high availability and minimize downtime.


  • Branch Offices: Ideal for medium to large branch offices requiring reliable, secure connectivity with the ability to integrate voice and video services.
  • Enterprise WAN: Suitable for enterprises needing high-performance routing for wide area network (WAN) connectivity with support for advanced security and application optimization.
  • Data Centers: Works effectively in data center environments, providing high-speed routing and integrated services for a streamlined network infrastructure.
  • Network Edge: Perfect for deployment at the network edge, providing a secure gateway to the internet and other external networks with robust protection and performance features.


  • Processor: Multi-core processor for high performance
  • Memory: 8 GB of RAM (expandable)
  • Storage: 8 GB of flash memory
  • WAN Interfaces: Multiple modular slots supporting various WAN interfaces (e.g., Ethernet, T1/E1, DSL)
  • LAN Interfaces: Multiple Gigabit Ethernet interfaces for network connectivity
  • IPsec VPN Throughput: Up to 200 Mbps
  • Aggregated Throughput: Up to 1 Gbps
  • Power Supply: Dual, redundant AC power supplies (hot-swappable)
  • Dimensions: 43.8 x 43.8 x 4.4 cm (17.2 x 17.2 x 1.7 inches)
  • Weight: 9.5 kg (21 lbs)
  • Operating Temperature: 0°C to 40°C (32°F to 104°F)

Why Choose

The Cisco ISR4351/K9 is engineered to meet the demanding requirements of modern enterprise networks, offering a perfect balance of performance, security, and flexibility. Its integrated services capabilities allow businesses to consolidate multiple network functions into a single device, simplifying management and reducing costs. With its modular design, high availability features, and scalability, the ISR4351/K9 ensures a future-proof investment that can grow with your organization’s needs.


SKU: ISR4351/K9
VAT Included

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