ISR4321-SEC/K9 Cisco ISR 4321 Security Bundle w/SEC license

Cisco ISR4321-SEC/K9 - Overview

The ISR 4321 is part of the Cisco 4000 Series Integrated Services Routers, designed for small to medium branch offices. The SEC bundle adds a pre-packaged security license, making it easier for enterprises to deploy secure WAN connectivity without purchasing add-on licenses separately.

🔧 Key Hardware Specs

• Form Factor: 1RU rack-mountable router
• Performance:
  • 50 Mbps default throughput, software-upgradeable to 100 Mbps
• Interfaces:
  • 1x RJ45/SFP combo Gigabit Ethernet WAN/LAN ports
  • 1x RJ45 Gigabit Ethernet LAN port
  • 2x NIM (Network Interface Module) slots
  • 1x ISC (Internal Services Card) slot
    
• Memory/Storage:
  • 4 GB DRAM (upgradeable to 8 GB)
  • 4 GB flash (upgradeable to 8 GB)
• Power: AC PSU (redundant PSU not supported on this model)
• Software: Runs Cisco IOS XE

SEC Bundle Features

The SEC license package enables:

• Zone-Based Firewall (ZBFW) - Stateful firewall with deep packet inspection
• VPN Services - IPsec, DMVPN, FlexVPN, SSL VPN
• Trustworthy Systems - Secure boot, image signing, runtime defenses
• Advanced Encryption - Strong cryptographic algorithms for compliance
• Integrated Security Monitoring - Syslog, SNMPv3, and NetFlow for visibility

🧩 Ideal Use Cases

• Branch offices needing secure WAN connectivity
• Enterprises deploying SD-WAN with built-in security
• Retail or distributed sites requiring VPN and firewall services
• Organizations standardizing on ISR 4000 for both routing and security