Cisco ISR 4431 Router 4GE / 3NIM / 8G / 4G Flash

• 4 x GE Ports
• 3 x NIM Slots
• 8GB DRAM / 4GB Flash
• Up to 500 Mbps Throughput
• Modular WAN/LAN Interfaces
• Integrated Security & Services
• IOS XE Software

Next-Gen Branch Routing – Cisco ISR 4431 Router (ISR4431/K9)

The Cisco ISR 4431 is a high-performance, modular branch router designed to meet the growing needs of enterprise networks. Combining integrated security, intelligent services, and exceptional throughput, it provides a scalable solution for modern WAN edge environments.

Enterprise Performance with Built-In Flexibility

Equipped with a multicore architecture and Cisco IOS XE software, the ISR 4431 offers up to 500 Mbps performance with on-demand upgrades. Three Network Interface Module (NIM) slots allow for customizable WAN and LAN connectivity, ideal for dynamic branch deployments.

Integrated Security & Virtualization

The ISR 4431 supports built-in application visibility, advanced threat defense, and VPN services. With onboard storage and KVM support, it enables branch virtualization and services like WAN optimization and firewall integration—all within a single platform.

Modular. Manageable. Future-Proof.

With support for dual power supplies and front-access I/O, the ISR 4431 ensures easy installation and redundancy. It's a smart investment for businesses looking to consolidate network functions without compromising performance or reliability.

Technical Specification

• Model: Cisco ISR 4431 (ISR4431/K9)
• Performance: Up to 500 Mbps (base license), scalable up to 1Gbps
• WAN/LAN Ports: 4 x 10/100/1000 Ethernet (RJ-45/SFP combo)
• Expansion: 3 x NIM slots, 2 x SM slots
• Memory: 8GB DRAM (default), expandable to 16GB
• Storage: 4GB Flash (default), expandable
• Software: Cisco IOS XE
• Virtualization: Supports Cisco NFVIS and KVM-based apps
• Security: VPN, firewall, IPS, zone-based policy firewall
• Form Factor: 1RU Rackmount
• Redundancy: Dual redundant power supply support