The Cisco ISR4431/K9 is part of the Cisco 4000 Series Integrated Services Routers, designed to deliver high-performance, secure, and scalable connectivity for enterprise branch environments. It combines routing, security, application visibility, and WAN optimization into a single platform.
This router supports aggregate throughput of 500 Mbps to 1 Gbps, making it ideal for medium to large enterprise deployments. It includes 4 Gigabit Ethernet ports, 4 SFP ports, and 3 NIM (Network Interface Module) slots, allowing flexible expansion and customization based on network requirements.
With built-in support for SD-WAN, advanced security, voice, and application optimization, the ISR4431/K9 enables organizations to modernize their network infrastructure and efficiently connect to cloud services and data centers.
The modular architecture allows easy upgrades of memory, storage, and interfaces, ensuring long-term scalability. Although the model is now End-of-Sale, Cisco will continue support until 2028, making it still a reliable option for existing infrastructures.
🔑 Key Features:
- Throughput: 500 Mbps to 1 Gbps
- 4 x Gigabit Ethernet ports + 4 x SFP ports
- 3 x NIM slots for expansion
- 8GB flash (expandable), up to 16GB DRAM
- Supports SD-WAN, security, and voice services
- Modular and scalable design
- Rack-mountable (1RU form factor)
