Cisco 3945 Integrated Services Router

The Cisco 3945 Integrated Services Router is a cornerstone of the Cisco 3900 Series, designed to deliver secure, scalable, and flexible networking at the enterprise edge. Built to support the evolving needs of branch offices and mid-size networks, this router combines robust performance with integrated services that cover security, voice, video, and data. The 3945 family—including the 3945E, 3925, and 3925E platforms—offers a modular, upgradeable solution that can grow with your organization, while maintaining a compact footprint and efficient power usage. With embedded hardware encryption acceleration, you get strong protection for sensitive traffic without compromising throughput, enabling secure remote access, site-to-site VPNs, and encrypted data transmission across your WAN. Running Cisco IOS XE, it brings a modern, resilient operating environment that supports virtualization, advanced QoS, and a broad ecosystem of software features designed to optimize performance across heterogeneous networks.

• Flexible platform lineup: four scalable options—Cisco 3945, 3945E, 3925, and 3925E—designed to fit a wide range of branch-office sizes and requirements.
• Integrated hardware encryption acceleration: fast, hardware-based IPsec and VPN processing to safeguard data-in-transit with minimal impact on performance.
• Modular interface support: expands with HWICs and NIMs to deliver diverse WAN and LAN connectivity, including serial, Gigabit Ethernet, T1/E1, and voice-enabled interfaces.
• Comprehensive security and unified communications support: built-in firewall, VPN, ACLs, VPN clustering, and seamless integration with Cisco’s collaboration and voice features for a complete edge solution.
• Enterprise-grade reliability and manageability: designed for high availability with scalable QoS, monitoring, and remote management capabilities that simplify deployment and ongoing operations.

Technical Details of Cisco 3945 Integrated Services Router

• Platform options: Cisco 3945, Cisco 3945E, Cisco 3925, Cisco 3925E
• Operating system: Cisco IOS XE, delivering modern features, security capabilities, and simplified management
• Encryption and security: hardware encryption acceleration for IPsec and VPN services, integrated firewall, and robust access control
• Modularity and interfaces: supports a wide range of interface cards (HWICs and NIMs) for flexible WAN/LAN connectivity, including serial, Ethernet, and voice modules
• Networking services: supports QoS, VPN, secure remote access, intrusion prevention-ready features, and data/voice/video convergence
• Performance and scalability: engineered to handle multiple concurrent services at branch-scale needs with room to grow as traffic increases

how to install Cisco 3945 Integrated Services Router

Installing the Cisco 3945 Integrated Services Router involves planning, rack placement, and proper configuration to unlock its full potential. Start with a clear deployment plan that outlines the sites, required interfaces, security policies, and redundancy needs. Mount the router in an appropriate 19-inch rack, ensuring adequate ventilation and access to power. If you’re using modular interface cards, install the HWICs or NIMs according to Cisco guidelines and secure them with captive mounting or chassis adapters as appropriate. Connect power supplies, and configure redundant power options if your site requires high availability. Connect the router to your network edges using the selected WAN links and internal LAN segments, and verify physical link status for all interfaces.

Access the device via the console port or a management interface to begin configuration. Use the Cisco IOS XE command-line interface to set hostname, enable features, and apply security baselines. Establish basic routing (static or dynamic), configure IP addressing for WAN and LAN interfaces, and enable VPN services with IPsec for secure site-to-site connectivity. Implement quality-of-service policies to prioritize business-critical traffic, such as voice and video, ensuring smooth performance even during peak loads. Deploy security measures, including access control lists (ACLs), firewall rules, and VPN authentication mechanisms, and consider enabling intrusion prevention features where appropriate. After initial configuration, monitor device health and link status through the integrated management tools, and schedule firmware updates and configuration backups to maintain ongoing reliability. The Cisco 3945 ecosystem allows you to tailor the installation with precise interfaces and services to match your organization’s needs, delivering a flexible, future-proof edge router.

Frequently asked questions

• What is the Cisco 3945 Integrated Services Router best used for? It is designed for enterprise edge and branch-office environments where a single platform must handle data, voice, video, and security services with scalable performance and flexible connectivity.
• What platforms are available in this family? The family includes the Cisco 3945, 3945E, 3925, and 3925E, allowing you to choose based on performance, flexibility, and power considerations.
• Does it support hardware encryption? Yes, the router includes embedded hardware encryption acceleration for IPsec and VPN workflows, enabling secure communications without sacrificing throughput.
• Can I add more interfaces as my network grows? Absolutely. The Cisco 3945 series supports a range of interface cards (HWICs and NIMs) for expanding WAN, LAN, and voice capabilities as needed.
• What software does it run? It runs Cisco IOS XE, which provides modern network features, security capabilities, and easier management across the device lifecycle.