Cisco ISR4321/K9 Integrated Services Router | 2 GE WAN/LAN Ports, 1 SFP, Security & Voice Services

The Cisco ISR4321/K9 Integrated Services Router is designed for small and medium-sized branch offices that require secure, scalable, and intelligent WAN connectivity. Featuring dual Gigabit Ethernet WAN/LAN ports, one dedicated SFP uplink, dual NIM expansion slots, and integrated security and voice services, the ISR4321/K9 provides enterprise-grade routing performance in a compact platform.

Powered by Cisco's multi-core CPU architecture, the router delivers up to 50 Mbps default throughput and can be upgraded to 100 Mbps through Cisco performance licensing, allowing businesses to scale network capacity as requirements grow. The platform supports VPN, firewall, application-aware routing, QoS, VoIP, and WAN optimization services.

Whether deployed in retail stores, branch offices, healthcare facilities, educational institutions, or enterprise remote sites, the Cisco ISR4321/K9 delivers reliable and secure connectivity for modern business applications.

• Integrated VPN support
• Advanced threat protection
• Secure remote access
• Firewall and encrypted communications

• Application-aware routing
• Traffic optimization
• Improved WAN performance
• Reduced operational costs

• 2 NIM slots for additional interfaces
• Modular architecture for future upgrades
• USB and management interfaces included

• Built-in voice service support
• Unified communications integration
• SIP and VoIP deployment support

• Default throughput: 50 Mbps
• Upgradeable to 100 Mbps with performance license
• Multi-core CPU architecture for enhanced processing capability

Businesses today require more than basic routing. They need secure connectivity, application optimization, cloud readiness, and future scalability.

The Cisco ISR4321/K9 addresses these challenges by offering:

• Secure branch connectivity
• Modular expansion capability
• Cisco enterprise reliability
• Integrated voice and data services
• Cost-effective deployment
• Intelligent WAN optimization
• Easy network management

Choose ISR4321/K9 if you need a cost-effective branch router with security and voice integration.

Choose ISR4331/K9 if your network requires higher throughput and more interface flexibility.

The router provides 50 Mbps throughput by default and can be upgraded to 100 Mbps using Cisco performance licenses.

Yes. The ISR4321/K9 supports secure VPN technologies, enabling encrypted communication between branch offices, data centers, and remote workers.

Yes. The router includes two NIM expansion slots that allow additional WAN, LAN, LTE, or voice modules to be installed.

Yes. Many organizations deploy ISR4321 routers in SD-WAN environments because of their modular design, security features, and WAN optimization capabilities. Community discussions also note support for additional interface modules when more connectivity is required.

The ISR4321/K9 is ideal for:

• Enterprise branch offices
• Retail locations
• Educational institutions
• Healthcare networks
• Financial service branches
• Remote office connectivity

Yes. Security services are included, providing protection for business-critical network traffic and remote access scenarios.

All products are supplied as genuine Cisco equipment with serial number verification support.

• Pre-sales consultation
• Configuration guidance
• Deployment recommendations
• Compatibility verification

• DHL
• FedEx
• UPS

Worldwide delivery available.

• 1-Year Warranty
• DOA Replacement Support
• Technical Assistance During Warranty Period