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 ISR4221/K9 is part of Cisco's 4000 Series Integrated Services Router family, purpose-built to meet the demands of modern branch office networking. Combining routing, security, and application performance capabilities into one cohesive platform, this router is an excellent solution for organizations seeking enterprise-class connectivity without the cost of new hardware.
The ISR4221 supports a throughput of up to 35 Mbps (with optional upgrades to 75 Mbps via a software license), making it well-suited for bandwidth-sensitive branch environments. It features 2 WAN/LAN ports and 2 integrated Service Module (SM) slots, allowing for flexible expansion with optional modules such as voice, wireless, and advanced security services.
Running Cisco IOS XE, the ISR4221/K9 benefits from a modern, modular operating system that supports programmability, container-based application hosting, and seamless integration with Cisco's DNA Center for centralized management. Its compact 1RU form factor makes it ideal for space-constrained deployments.
Each Refurbished Cisco ISR4221/K9 sold by WhaleyComm has been professionally inspected and tested to ensure full operational functionality, offering a reliable and cost-effective path to enterprise-grade branch networking.
Technical Specifications
Series
Cisco 4000 Series ISR
Form Factor
1RU Rack-Mount
WAN/LAN Ports
2 x RJ-45 GE WAN/LAN
Default Throughput
35 Mbps
Maximum Throughput (Licensed)
75 Mbps
Operating System
Cisco IOS XE
Management Port
1 x RJ-45 Console, 1 x RJ-45 Auxiliary
Power Supply
Internal AC Power Supply
Ideal Use Cases
Small Branch Office Connectivity
The ISR4221/K9 is ideally sized for small branch offices requiring reliable WAN connectivity and integrated security. Its modular expansion slots allow the network to grow alongside business needs without requiring a full hardware replacement.
SD-WAN Edge Deployment
With Cisco IOS XE and compatibility with Cisco SD-WAN (Viptela) software, the ISR4221 can serve as a capable SD-WAN edge device. This enables centralized policy management and improved application performance across distributed enterprise locations.
Secure Remote Site Networking
Organizations that require VPN termination and integrated firewall capabilities at remote sites will find the ISR4221/K9 a cost-effective solution. Its security feature set helps enforce consistent network policies across all branch locations.
What's Included
✔ Cisco ISR4221/K9 Refurbished Router Unit
✔ AC Power Cord
✔ Rack-Mount Hardware (where available)
✔ RJ-45 Console Cable
✔ WhaleyComm Quality Inspection Certification
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 ISR4221/K9 is compatible with the following platforms, software, and ecosystems
✓
Operating System: Cisco IOS XE (multiple releases supported)
Management Platforms Cisco DNA Center, Cisco Prime Infrastructure
✓
SD-WAN: Compatible with Cisco SD-WAN (Viptela) software with appropriate licensing
✓
Security: Cisco Umbrella, Cisco FirePOWER (with applicable modules)
✓
Expansion Modules: Compatible with Cisco SM (Service Module) family and NIM (Network Interface Module) cards
✓
Licensing: Cisco Smart Licensing supported; throughput upgradeable via software license to 75 Mbps
