ISR4351-AX/K9 Cisco ISR 4351 AX Bundle w/APP, SEC license

Cisco ISR4351-AX/K9 - Overview

The Cisco ISR4351-AX/K9 is a 3RU modular router from the Cisco 4000 Series, designed for medium to large branch offices and regional aggregation sites. The AX bundle integrates Application Experience (AX) services, combining advanced WAN optimization, application visibility, and security features into a single converged platform. Compared to the ISR4331, it offers higher throughput, more expansion capacity, and built-in application performance management for hybrid WAN and cloud deployments.

🔧 Key Hardware Specifications

• Form Factor: 3RU rack-mountable router
• Performance:
  • 200 Mbps default throughput
  • Upgradeable to 400 Mbps or 1 Gbps with performance licenses
• Interfaces:
  • 3x RJ45/SFP combo Gigabit Ethernet WAN/LAN ports
  • 2x 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)
  • 4 GB flash (upgradeable to 16 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

• Branch offices requiring application-aware WAN optimization
• 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