ISR4431-SEC/K9 Cisco ISR 4431 Security Bundle w/SEC license

Cisco ISR4431-SEC/K9 - Overview

The Cisco ISR4431-SEC/K9 is a 1RU modular router from the Cisco 4400 Series, designed for medium to large branch offices and regional aggregation sites. It delivers higher throughput and scalability compared to the ISR4351, while the SEC bundle ensures advanced security features are enabled out of the box. With integrated VPN, firewall, and encryption services, the ISR4431-SEC/K9 is a secure, high-performance platform for WAN edge deployments.

🔧 Key Hardware Specifications

• Form Factor: 1RU rack-mountable router
• Performance:
  • 500 Mbps default throughput
  • Upgradeable to 1 Gbps or 2 Gbps with performance licenses
• Interfaces:
  • 4x RJ45/SFP combo Gigabit Ethernet WAN/LAN ports
  • 3x NIM (Network Interface 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

🛡️ 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

• Enterprise WAN edge with integrated security
• Branch or regional offices requiring high throughput and secure VPN aggregation
• Hybrid WAN and SD-WAN deployments with application-aware routing
• Organizations consolidating routing and security into a single ISR platform