Cisco ISR4431/K9 Router – High-Performance Enterprise Edge

Equipment Overview

The Cisco ISR4431/K9 is an enterprise-grade modular router from the Cisco ISR 4000 series, designed for medium-to-large branch offices and campus deployments. It provides integrated routing, security, and application services with a compact form factor suited for demanding network environments. The platform supports high-performance WAN aggregation, advanced QoS, and scalable connectivity through its modular interface slots. This model is primarily deployed for reliable, secure data transport across distributed enterprise networks.

Main Parameters

• Model: ISR4431/K9
• Ports: 4 x Gigabit Ethernet (GE)
• Network Interface Modules (NIM): 3 slots
• Flash Memory: 8 GB
• DRAM: 4 GB
• Software Feature Set: IP Base (IPB)
• Series: Cisco ISR 4000

Key Advantages

The ISR4431/K9 offers a balanced combination of performance and modular expandability, making it suitable for enterprises requiring consistent throughput and service integration. Its NIM slots allow for flexible WAN interface customization, while the IP Base license covers essential routing protocols and VPN features. The 8 GB flash and 4 GB DRAM configuration ensures adequate capacity for current software images and moderate concurrent session handling.

Compatibility & Integration

This router operates within the Cisco IOS XE software environment, supporting standard enterprise routing protocols and security features. It integrates seamlessly with other Cisco networking hardware, including switches and security appliances, and adheres to industry-standard Ethernet and modular interface specifications. The unit is compatible with a range of Cisco NIM modules for tailored WAN connectivity options.