Cisco ISR4331/K9 4331 Integrated Services Router

Description

Cisco ISR4331/K9 – Cisco 4331 Integrated Services Router

The Cisco ISR4331/K9 is a high-performance Integrated Services Router (ISR) from the Cisco 4000 Series, designed for enterprise branch offices that require secure, scalable, and flexible connectivity. It provides modular WAN, advanced security, and cloud-ready networking in a compact form factor.

Key Specifications:

• Performance:
  • Throughput: Up to 100 Mbps (default), upgradeable to 300 Mbps
  • CPU: Multi-core x86 architecture
  • Memory: 4GB DDR3 RAM (expandable to 16GB)
  • Flash Storage: 4GB (default), expandable to 16GB
• Interfaces:
  • 3× RJ45 GE ports (2 LAN/WAN, 1 dedicated management port)
  • 2× NIM (Network Interface Module) slots for WAN expansion
  • 1× SM (Service Module) slot for additional services
  • 2× Integrated USB 3.0 ports for external storage
  • 1× Console & 1× AUX port
• WAN & VPN Support:
  • Gigabit Ethernet, T1/E1, xDSL, LTE, MPLS, and fiber WAN connectivity (via NIMs)
  • IPsec VPN, DMVPN, GETVPN, FlexVPN for secure remote connections
  • SSL VPN & GRE tunneling
• Security Features:
  • Next-Generation Firewall (NGFW), Intrusion Prevention System (IPS), Advanced Malware Protection (AMP)
  • Integrated Security with Cisco Umbrella and TrustSec
  • 802.1X authentication, MACsec encryption, ACLs
• QoS & Traffic Management:
  • Application Visibility and Control (AVC)
  • WAN Optimization & SD-WAN support
  • Deep Packet Inspection (DPI) with NBAR2
• Redundancy & Resilience:
  • Dual redundant power supply support
  • Modular design for future upgrades
• Management & Automation:
  • Cisco DNA Center, Cisco SD-WAN, CLI, SNMP, Web GUI
  • Support for NETCONF, REST APIs, and Model-Driven Telemetry
• Form Factor: 1RU Rack-mountable

Key Features:

✔ Flexible WAN Connectivity: Supports Ethernet, Fiber, LTE, and legacy T1/E1 interfaces
✔ Advanced Security: Built-in Firewall, VPN, IPS, and Malware Protection
✔ SD-WAN Ready: Enables intelligent traffic routing for cloud applications
✔ Scalable Performance: Upgradable from 100 Mbps to 300 Mbps as network demands grow
✔ Modular Design: Expandable NIM and SM slots for additional services
✔ High Availability & Resilience: Redundant power options and failover capabilities

Use Cases:

✅ Enterprise Branch Offices needing secure and scalable WAN connectivity
✅ Multi-Site & Remote Offices requiring VPN, SD-WAN, and QoS optimization
✅ Cloud-Connected Businesses using SaaS, MPLS, and hybrid cloud services
✅ Industrial & Government Networks requiring high security and reliability
✅ Retail & Healthcare Facilities with voice, data, and video convergence