Cisco ISR4221/K9 Integrated Services Router

Save up to 80% over list price on this Cisco 4221 ISR — a high-performance branch router built for enterprise WAN, SD-WAN, and secure connectivity. Every refurbished unit from Reef Telecom is thoroughly tested, cleaned, and backed by our industry-leading 10-year warranty.

Key Specifications

• Part Number: ISR4221/K9
• Throughput: 35 Mbps–75 Mbps (with performance license upgrade)
• WAN/LAN Ports: 2x Gigabit Ethernet (RJ-45) + 1x GE SFP combo port
• Module Slots: 2x NIM slots, 1x ISC slot
• Memory: 4 GB DRAM default / 8 GB Flash default
• CPU: Multi-core processor
• Form Factor: 1RU rack-mountable
• Software: Cisco IOS XE with SD-WAN, VPN, firewall, and application-aware routing support

Why Buy From Reef Telecom?

• 10-year warranty on all refurbished equipment
• Free shipping on orders over $300
• Fully tested and certified before shipment
• Same-day shipping on most orders

Ideal Use Cases

The Cisco 4221 ISR is designed for small-to-mid enterprise branch offices, remote sites, and SD-WAN deployments. It supports Cisco Intelligent WAN (IWAN) features including application-aware routing, VPN encryption, WAN optimization, and traffic management — all without compromising throughput. Expand functionality with optional NIM modules for T1/E1 WAN, additional GE switching, or wireless LAN.

Free ground shipping on orders over $300. Same-day shipping on orders placed before 4PM EST.

All products include our industry-leading 10 Year Warranty backed by Reef Telecom.