REFURBISHED
Cisco
Cisco ISR4431-AX/K9 Refurbished - Integrated Services Router
MPN: ISR4431-AX/K9
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Lifetime
Warranty
ISO 9001
Certified Testing
R2v3
Responsible Refurb
25+
Years
5K+
Customers
ISO
Certified
✓
Tested
Every WhaleyComm unit is professionally tested, reset to factory defaults, and certified by our in-house engineers — the same standard trusted by 5,000+ organisations across 25 years. Not a refurb marketplace. A certified lifecycle partner.
Tested to factory specification. Backed by 25 years of enterprise trust.
The Refurbished Cisco ISR4431-AX/K9 is an enterprise-class Integrated Services Router from Cisco's 4400 series, designed to deliver high-throughput performance and comprehensive network services for demanding branch office environments. Part of Cisco's Application Experience (AX) bundle, this router comes equipped with advanced software licenses that enable application visibility, WAN optimization, and enhanced security features right out of the box.Built for scalability and flexibility, the ISR4431 supports modular service integration through its Network Interface Module (NIM) and Service Module (SM) slots, allowing network administrators to extend functionality as business needs evolve. The platform supports simultaneous services such as routing, switching, security, unified communications, and WAN optimization without degrading overall system performance.
With its multi-core CPU architecture, the ISR4431 delivers consistent performance even under heavy network loads, making it well-suited for organizations running latency-sensitive applications such as VoIP, video conferencing, and cloud-based services. The router is compatible with Cisco IOS XE, providing a modern, modular operating system environment with enhanced programmability and automation capabilities.
Purchasing this unit as Refurbished through WhaleyComm offers enterprise-grade Cisco reliability at a fraction of the new list price — ideal for budget-conscious IT teams, lab environments, or network refresh projects. Each unit is tested and verified to meet functional standards before shipment.
Technical Specifications
{'MPN'
'ISR4431-AX/K9', 'Brand': 'Cisco', 'Series': 'Cisco ISR 4400', 'Form Factor': '1U Rack-Mountable', 'WAN Throughput': '500 Mbps', 'Number of WAN/LAN Ports': '4 x GE RJ-45', 'NIM Slots': '4', 'SM Slots': '2', 'Operating System': 'Cisco IOS XE', 'Bundle': 'Application Experience (AX)', 'USB Ports': '2 x USB 3.0', 'Condition': 'Refurbished'}
Ideal Use Cases
Enterprise Branch Office Connectivity
The ISR4431-AX/K9 is ideal for medium to large branch offices requiring reliable, high-throughput WAN connectivity. Its modular architecture allows IT teams to tailor services—such as security, voice, and switching—to site-specific needs.
Secure SD-WAN and WAN Optimization
With the AX bundle's built-in application visibility and optimization capabilities, this router supports intelligent WAN path selection and traffic prioritization. Organizations running cloud applications or hybrid WAN environments benefit from improved application performance and reduced bandwidth costs.
Network Lab and Proof-of-Concept Testing
The Refurbished ISR4431-AX/K9 is a cost-effective choice for IT teams building lab environments or testing network designs before production deployment. Its full IOS XE feature set makes it representative of real-world enterprise deployments.
What's Included
✔ Cisco ISR4431-AX/K9 Refurbished Router Unit
✔ AC Power Supply
✔ Rack-Mount Kit
✔ [Verify: Software license documentation / PAK included — confirm with supplier]
✔ [Verify: Console cable included — confirm with supplier]
Lifetime Warranty - No Time Limits. No Questions.
Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it. 25 years, 5,000+ customers.
Compatibility Details
Review supported optics, cables, software, management protocols, and environment-specific compatibility guidance.
✓
The Cisco ISR4431-AX/K9 runs Cisco IOS XE and is compatible with the broader Cisco routing and switching ecosystem. It supports integration with Cisco DNA Center for centralized management and automation. Compatible Network Interface Modules (NIMs) and Service Modules (SMs) from the Cisco ISR 4000 series accessory lineup can be installed to extend functionality. The AX bundle includes compatibility with Cisco Application Visibility and Control (AVC) and [Verify: WAAS/AppNav for WAN optimization — confirm active license scope]. Management is supported via Cisco CLI, SNMP, NETCONF/YANG, and Cisco Prime Infrastructure.
Shipping & Returns
Clear fulfilment, tracking, return, warranty, and support information for enterprise hardware orders.
Shipping
Orders ship within 1-2 business days.
Returns
Contact support for DOA or warranty issues.
Frequently Asked Questions
Product-specific answers about compatibility, testing, warranty, fulfilment, and purchase confidence.
The 'AX' designation indicates this router includes Cisco's Application Experience bundle, which provides advanced software licenses for application visibility, WAN optimization features, and enhanced security capabilities beyond the base IP Base license.
Yes, the ISR4431 platform runs Cisco IOS XE, Cisco's modern modular operating system that supports programmability, automation, and a broad range of enterprise routing and security features.
This unit is sold as Refurbished, meaning it has been previously used, tested for functionality, and verified to meet operational standards. It is a cost-effective alternative to purchasing new while delivering the same Cisco platform performance.
Yes, the ISR4431 features four NIM (Network Interface Module) slots and two SM (Service Module) slots, allowing you to add interfaces, storage, voice DSPs, or additional service capabilities using compatible Cisco 4000 series modules.
Cisco ISR4431-AX/K9 Refurbished - Integrated Services Router
$229.00
Cisco
Cisco ISR4431-AX/K9 Refurbished - Integrated Services Router
MPN: ISR4431-AX/K9
$229.00
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