ISR4451-X-AX/K9 Cisco ISR 4451 AX Bundle w/APP, SEC license

Cisco ISR4451-X-AX/K9 - Overview

The Cisco ISR4451-X-AX/K9 is a high-performance 2RU modular router from the Cisco 4450 Series, designed for large branch offices, regional hubs, and enterprise WAN edge deployments. Compared to the ISR4431, it delivers significantly higher throughput and expansion capacity. The AX bundle integrates Application Experience (AX) services, combining WAN optimization, application visibility, and advanced security into a single converged platform.

🔧 Key Hardware Specifications

• Form Factor: 2RU rack-mountable router
• Performance:
  • 1 Gbps default throughput
  • Upgradeable to 2 Gbps or 4 Gbps with performance licenses
• Interfaces:
  • 4x RJ45/SFP combo Gigabit Ethernet WAN/LAN ports
  • 3x NIM (Network Interface Module) slots
  • 2x SM-X (Service Module) slots
  • 1x ISC (Internal Services Card) slot
• Memory/Storage:
  • 4 GB DRAM (upgradeable to 16 GB)
  • 8 GB flash (upgradeable to 32 GB)
• Software: Runs Cisco IOS XE
• Power: Dual redundant PSU options available

🚀 AX Bundle Features

The Application Experience (AX) license package enables:

• Application Visibility and Control (AVC): Deep packet inspection and traffic analytics for over 1000 applications
• WAN Optimization: Integrated Cisco WAAS (Wide Area Application Services) for improved application performance over WAN links
• Performance Routing (PfR): Intelligent path control for hybrid WAN and cloud connectivity
• Security Integration: Advanced VPN, firewall, and encryption features included
• Cloud Readiness: Optimized for SaaS, IaaS, and hybrid cloud environments

🧩 Ideal Use Cases

• Large branch or regional offices requiring high-throughput WAN edge
• Enterprises deploying hybrid WAN with intelligent path selection
• Organizations consolidating routing, security, and application performance into a single ISR platform
• Retail or distributed sites needing visibility into application usage and performance