Cisco ISR4321/K9 4321 Integrated Service Router
Experience powerful, secure, and scalable networking with the Cisco ISR4321/K9 4321 Integrated Service Router. Designed for modern enterprises, this router combines advanced WAN connectivity, robust security, and superior performance, making it ideal for small to medium branch deployments that demand reliability and flexibility.
Key Features
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High Availability & Scalability
Built to deliver consistent uptime and handle expanding network needs effortlessly. -
Cost-Effective WAN Optimization
Reduces WAN expenditures through intelligent traffic management and optimized routing. -
Enhanced Security & Application Performance
Delivers secure user experiences with integrated firewall, VPN, and application visibility. -
Compact, Efficient Design
Supports IT consolidation with a smaller footprint, saving rack space and reducing total cost of ownership (TCO). -
Flexible Connectivity Options
Features multiple Gigabit Ethernet interfaces and modular ports for maximum deployment versatility.
Specifications
| Feature | Specification |
|---|---|
| Brand | Cisco |
| Model | ISR4321/K9 |
| Product Type | Integrated Service Router |
| Series | ISR 4000 Series |
| RAM | 4GB |
| Flash Memory | 4GB |
| Processor | 1 |
| Wireless Type | 802.11abg |
| USB Ports | 1 × USB 2.0, 1 × USB 3.0 |
| Operating System | Cisco IOS IP Base |
| Dimensions (L×W×H) | 16 × 10 × 22 inches |
| Weight | 7.7 pounds |
| Voltage | 240V |
| Color | Black |
| Manufacturer | Cisco |
| Condition | Brand New |
| Warranty | 1 Year Limited Warranty |
Why Choose Cisco ISR4321/K9
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Delivers enterprise-grade performance for small and medium offices
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Supports modular WAN and LAN connections for flexible scalability
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Offers integrated security features for encrypted VPNs and secure data transfer
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Simplifies IT management and deployment with Cisco IOS software
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Ensures high-speed connectivity with Gigabit Ethernet support







Gacheru –
The throughput is incredible, no bottlenecks.
Halima –
The throughput is incredible, no bottlenecks.
Muriithi –
It’s an investment, but it pays off in reliability.
Nyambu –
Definitely recommend for serious network needs. The VPN capabilities are excellent. Handles heavy network traffic with ease.
Wafula –
Support from Cisco is always helpful.