ISR4451-X-SEC/K9 Cisco ISR 4451 Security Bundle w/SEC license

Cisco ISR4451-X-SEC/K9 - Overview

The Cisco ISR4451-X-SEC/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 SEC bundle ensures that advanced security services are enabled out of the box, making it a converged platform for secure routing, VPN aggregation, and application-aware WAN connectivity.

🔧 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

🛡️ SEC Bundle Features

The Security (SEC) license package enables:

• Advanced VPN Services: IPsec, DMVPN, FlexVPN, and SSL VPN support
• Integrated Firewall: Stateful inspection and zone-based firewall capabilities
• Encryption: Hardware-accelerated encryption for secure WAN and cloud connectivity
• Secure Routing: Policy-based routing with integrated security enforcement
• Compliance: Secure voice and data services for regulatory requirements

🧩 Ideal Use Cases

• Large branch or regional offices requiring secure, high-throughput WAN edge
• Enterprises deploying hybrid WAN with integrated VPN and firewall services
• Organizations consolidating routing and security into a single ISR platform
• Retail or distributed sites needing compliance-ready secure connectivity