REFURBISHED
Cisco
Cisco ISR4431/K9 Refurbished - Integrated Services Router
MPN: ISR4431/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/K9 is a powerful branch-office router from Cisco's ISR 4000 Series, engineered to consolidate routing, security, voice, and WAN optimization into a single platform. Designed for medium to large branch environments, the ISR 4431 delivers the performance and modular expandability that enterprise networks demand — without the cost of a new unit.This router supports multiple WAN connectivity options and integrates seamlessly with Cisco IOS XE Software, enabling advanced features such as SD-WAN readiness, Zone-Based Firewall, IPsec VPN, and application visibility. Its modular architecture accommodates Network Interface Modules (NIMs) and Service Module (SM) slots, giving network engineers the flexibility to tailor the platform to specific deployment requirements.
Sourced, inspected, and tested by WhaleyComm, this Refurbished unit provides a cost-effective path to enterprise-grade routing infrastructure. Each unit undergoes quality checks to ensure reliable operation, making it an ideal choice for IT teams looking to expand or refresh their network without overextending their budget.
Whether you are deploying a new branch site, upgrading aging infrastructure, or building redundancy into your WAN edge, the Cisco ISR4431/K9 offers the performance, feature depth, and Cisco ecosystem compatibility that network professionals trust. At $229.00, this Refurbished unit represents exceptional value for enterprise IT environments.
Technical Specifications
{'Model / MPN'
'ISR4431/K9', 'Brand': 'Cisco', 'Series': 'ISR 4000', 'Form Factor': '1U Rack-Mount', 'Operating System': 'Cisco IOS XE Software', 'WAN Throughput': '500 Mbps', 'NIM Slots': '4', 'SM Slots': '1', 'Onboard GE Ports': '4', 'USB Ports': '2', 'Condition': 'Refurbished'}
Ideal Use Cases
Enterprise Branch Office Routing
Deploy the ISR4431/K9 as the primary WAN edge router for medium to large branch locations requiring reliable, high-throughput connectivity back to headquarters. Its modular NIM slots allow the addition of specialized WAN interface cards to match existing circuit types.
Secure SD-WAN & VPN Gateway
Leverage Cisco IOS XE's built-in IPsec VPN and Zone-Based Firewall capabilities to establish secure, encrypted tunnels between branch sites and data centers. The platform's SD-WAN readiness makes it a strong foundation for organizations transitioning to software-defined WAN architectures.
Network Consolidation & Infrastructure Refresh
Replace aging, end-of-life branch routers with a proven enterprise platform that consolidates routing, security, and WAN services onto a single device. The Refurbished ISR4431/K9 delivers this capability at a significantly reduced capital expenditure compared to new hardware.
What's Included
✔ Cisco ISR4431/K9 Refurbished Router Unit
✔ AC Power Supply
✔ Rack-Mount Ears
✔ [Verify: Console Cable Included]
✔ [Verify: Power Cord Included]
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/K9 runs Cisco IOS XE Software and is compatible with the broader Cisco routing and switching ecosystem. It supports Cisco Network Interface Modules (NIMs) and Service Modules (SMs) for modular WAN and service expansion. The platform is compatible with Cisco DNA Center for centralized management and automation, as well as Cisco Prime Infrastructure for traditional network management workflows. It supports integration with Cisco Catalyst switches, Cisco ASA and Firepower security appliances, and Cisco Unified Communications Manager (CUCM) for voice deployments. SD-WAN deployments using Cisco Viptela (IOS XE SD-WAN) are supported on appropriate software versions. Always verify IOS XE software version compatibility with specific NIMs, SMs, and management platforms before deployment.
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.
Refurbished means this unit has been previously used, then inspected, tested, and verified for proper operation by WhaleyComm. It is not a new unit but is confirmed functional and represents significant cost savings over new hardware.
Software licensing and IOS XE version availability can vary on Refurbished units. We strongly recommend contacting WhaleyComm prior to purchase to confirm the software state and discuss licensing requirements for your specific use case.
Yes, the ISR 4431 platform supports Cisco IOS XE SD-WAN functionality, enabling it to be deployed as an SD-WAN edge device when running a compatible IOS XE SD-WAN software image and with appropriate licensing.
The ISR4431/K9 supports Cisco Network Interface Modules (NIMs) across its four NIM slots and one Service Module (SM) slot, allowing expansion for various WAN interfaces, voice, and other network services. Verify NIM and SM compatibility with your target IOS XE software version before purchasing modules.
Cisco ISR4431/K9 Refurbished - Integrated Services Router
$229.00
