Cisco ISR4321-SEC/K9 ISR 4321 Security Bundle Router | 2 GE Ports, 2 NIM Slots

Cisco ISR4321-SEC/K9 — Secure Branch Routing at Enterprise Scale

Save big on the Cisco ISR 4321 Security Bundle router without sacrificing performance or reliability. Every refurbished ISR4321-SEC/K9 from Reef Telecom is thoroughly tested, cleaned, and backed by our industry-leading 10-year warranty—5x longer than most competitors.

Key Specifications

• Part Number: ISR4321-SEC/K9
• Series: Cisco ISR 4000 Series Integrated Services Router
• Security License: Permanent SEC license included (IP Base + Security)
• Throughput: 50 Mbps – 100 Mbps aggregate
• WAN/LAN Ports: 2x onboard GE (RJ-45) + 1x SFP port
• Module Slots: 2x NIM slots, 1x ISC slot
• Memory: 4 GB DRAM (expandable to 16 GB) / 4 GB Flash (expandable to 8 GB)
• CPU: Multi-core processor for concurrent service handling
• Power: AC 100–240V auto-ranging (external AC or PoE supply)
• Form Factor: 1 RU, rack-mountable or wall-mountable
• Management: RJ-45 console, mini-USB console, USB 2.0, AUX port

Built-In Security & Intelligent WAN

The ISR4321-SEC/K9 includes Cisco's permanent Security license, enabling hardware-accelerated encryption, firewall protection, VPN (IPsec/DMVPN), Zone-Based Firewall, and intrusion prevention—all without degrading throughput. Cisco Intelligent WAN (IWAN) dynamically routes traffic across the best available link based on real-time application and network conditions.

Ideal Use Cases

Perfect for enterprise branch offices, SD-WAN deployments, CCNA/CCNP lab environments, and small-to-medium business WANs requiring secure connectivity to private data centers and public clouds over MPLS or Internet links.

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