ISR4331-AX/K9 Cisco ISR 4331 AX Bundle w/APP, SEC license

Cisco ISR4331-AX/K9 - Overview

The ISR 4331 sits in the middle of the ISR 4000 family, offering more performance and expansion than the 4321 while still being compact enough for branch deployments. The AX bundle adds a comprehensive software feature set for enterprises that need more than basic routing.

🔧 Key Hardware Specs

• Form Factor: 1RU rack-mountable router
• Performance:
  • 100 Mbps default throughput, software-upgradeable to 300 Mbps
• Interfaces:
  • 2x RJ45/SFP combo Gigabit Ethernet WAN/LAN ports
    
  • 2x NIM (Network Interface Module) slots
  • 1x SM (Service Module) slot
  • 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

AX Bundle Features

The AX license package enables:

• Application Visibility and Control (AVC) - deep packet inspection and traffic analytics
• WAN Optimization - Cisco WAAS Express for branch acceleration
• Integrated Security - Zone-Based Firewall, VPN (IPsec, DMVPN, FlexVPN), Trustworthy Systems
• Performance Licensing - throughput upgrades beyond the base 100 Mbps
• Unified Communications Readiness - support for voice/video services if needed

🧩 Ideal Use Cases

• Medium branch offices needing secure WAN and SD-WAN connectivity
• Enterprises requiring application-aware routing and traffic optimization
• Retail or distributed sites with higher throughput needs than the ISR4321
• Organizations consolidating routing, WAN optimization, and security into one platform