ISR4431/K9 Cisco ISR4431 Integrated Services Router
Cisco ISR4431/K9 ISR4431 Integrated Services Router
Enterprise Cisco ISR4431 Integrated Services Router for High-Performance WAN and Branch Networks
The Cisco ISR4431/K9 is a high-performance Integrated Services Router from the Cisco 4000 Series, designed for enterprise branch offices, WAN edge, and distributed network environments. Featuring a scalable 2RU modular architecture, it provides advanced routing, security, application services, and network connectivity with 4 onboard Gigabit Ethernet ports, 3 Network Interface Module (NIM) slots, and 1 Integrated Services Card (ISC) slot.
Powered by Cisco IOS XE Software, the Cisco ISR4431/K9 supports IPv4/IPv6 routing, VPN, firewall, NAT, Quality of Service (QoS), and application-aware networking. Its modular architecture allows organizations to expand network interfaces and services as infrastructure requirements evolve, making it suitable for secure and scalable WAN deployments.
The Cisco ISR4431/K9 Integrated Services Router is an ideal solution for enterprise branch networking, WAN edge routing, secure VPN connectivity, data center and cloud connectivity, and distributed corporate infrastructure. It combines flexible modular expansion with enterprise-grade routing and integrated network services in a space-efficient platform.
Product Specifications - Cisco ISR4431/K9 Integrated Services Router Datasheet
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| Specification | Details |
|---|---|
| Product Name | Cisco ISR4431/K9 Integrated Services Router |
| Manufacturer | Cisco Systems |
| Part Number | ISR4431/K9 |
| Product Type | Integrated Services Router |
| Series | Cisco 4000 Series |
| Platform | Cisco 4431 Integrated Services Router |
| Form Factor | 2RU |
| Operating System | Cisco IOS XE Software |
| Default Aggregate Throughput | 500 Mbps |
| Aggregate Throughput with Performance License | Up to 1 Gbps |
| Onboard WAN/LAN Ports | 4 × 10/100/1000 Gigabit Ethernet |
| RJ-45 Ports | 4 |
| SFP Ports | 4 |
| NIM Slots | 3 |
| Integrated Services Card (ISC) Slots | 1 |
| Service Module Support | No Enhanced Service Module (SM-X) slots on ISR4431 |
| Module Online Insertion and Removal (OIR) | Supported |
| DRAM | 2 GB default data-plane DRAM + 4 GB default control-plane DRAM; up to 16 GB |
| Flash Memory | 8 GB default; up to 32 GB |
| Power Supply | Internal; AC, PoE, or DC options |
| Power Redundancy | Supported |
| PoE Support | Up to 250W without PoE boost; up to 500W with PoE boost |
| VPN | Supported |
| Firewall & NAT | VRF-aware Firewall and Network Address Translation (NAT) services |
| Intrusion Prevention | Supported |
| Management Port | 1 × Integrated Gigabit Ethernet out-of-band management port |
| USB Ports | 2 × USB Type-A |
| IPv4/IPv6 Routing | Supported |
| Quality of Service (QoS) | Supported |
| Application-Aware Networking | Supported |
| Architecture | Modular multicore Cisco ISR architecture |
| Deployment | Enterprise branch, WAN edge, data center, and distributed network environments |
| Use Cases | Enterprise branch networking, WAN edge routing, secure VPN connectivity, cloud/data center connectivity, and application-aware networking |
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FAQs
Q1. What is the Cisco ISR4431/K9?
The Cisco ISR4431/K9 is a Cisco 4000 Series Integrated Services Router designed to provide enterprise routing, WAN connectivity, security, and application services for branch and distributed networks.
Q2. Who should buy the Cisco ISR4431/K9?
The Cisco ISR4431/K9 is ideal for enterprises, government organizations, educational institutions, service providers, and businesses requiring scalable WAN edge and branch networking capabilities.
Q3. Is a refurbished Cisco ISR4431/K9 worth buying?
Yes. A professionally refurbished Cisco ISR4431/K9 can provide reliable enterprise routing performance and advanced Cisco IOS XE networking capabilities at a significantly lower cost for compatible network environments.
Q4. What software does the Cisco ISR4431/K9 use?
The Cisco ISR4431/K9 runs Cisco IOS XE Software, supporting advanced routing, VPN, QoS, NAT, IPv4/IPv6, security, and application-aware networking services.
Q5. Does the Cisco ISR4431/K9 support expansion modules?
Yes. The Cisco ISR4431/K9 features a modular architecture supporting Network Interface Modules (NIMs) and service modules, allowing organizations to expand connectivity and networking services according to their requirements.
