Cisco-ISR4351/K9
The Cisco ISR4351/K9 is a high-performance Cisco Integrated Services Router designed for enterprise branch offices, distributed networks, and demanding WAN environments. It provides three Gigabit Ethernet interfaces, modular NIM and SM-X expansion, and Cisco IOS XE support for advanced routing, security, VPN, QoS, and application services.
Description
The Cisco ISR4351/K9 is part of the Cisco 4000 Series Integrated Services Routers, engineered to consolidate multiple branch-network functions into a single modular platform. It combines enterprise routing with security, WAN connectivity, application services, and flexible hardware expansion.
The router provides three integrated Gigabit Ethernet interfaces, including flexible connectivity options for LAN and WAN deployments. Its modular architecture includes three Network Interface Module (NIM) slots and two Enhanced Service Module (SM-X) slots, allowing organizations to expand network interfaces and deploy additional services as their requirements evolve.
Powered by Cisco IOS XE, the ISR4351/K9 supports enterprise routing protocols, IPv4/IPv6 networking, QoS, NAT, IPsec VPN, and integrated security capabilities. It is designed to handle branch traffic while supporting applications such as voice, video, collaboration, and business-critical data services.
The ISR4351/K9 also supports Cisco’s Application Experience (AppX) capabilities, providing application visibility and optimization features for distributed enterprise networks. Its modular architecture makes it particularly suitable for organizations that require a flexible WAN-edge platform with room for future expansion.
Key Specifications
| Feature | Specification |
|---|---|
| Brand | Cisco |
| Series | ISR 4000 Series |
| Model | ISR4351/K9 |
| Platform Type | Integrated Services Router |
| Gigabit Ethernet Ports | 3 |
| Integrated Interfaces | 2 × GE RJ-45 + 1 × GE RJ-45/SFP |
| NIM Slots | 3 |
| Service Module Slots | 2 × SM-X |
| Operating System | Cisco IOS XE |
| WAN Connectivity | Gigabit Ethernet |
| VPN | IPsec VPN |
| IPv4 / IPv6 | Supported |
| QoS | Supported |
| Security | Integrated Security Features |
| Form Factor | 2RU Rack-Mountable |
| Application | Branch / WAN / Enterprise Routing |
Key Features & Benefits
- 3 × Gigabit Ethernet interfaces
- Flexible Ethernet connectivity for LAN and WAN deployments
- 3 × NIM expansion slots
- 2 × SM-X service module slots
- Cisco IOS XE operating system
- Advanced IPv4 and IPv6 routing
- IPsec VPN support
- Network Address Translation (NAT)
- Quality of Service (QoS)
- Integrated enterprise security features
- Application visibility and optimization capabilities
- Modular architecture for future expansion
- Supports voice, video, and data applications
- Designed for demanding branch-office environments
- 2RU rack-mountable chassis
Recommended Applications
- Enterprise Branch Offices
- Large Branch Networks
- WAN Edge Routing
- VPN Gateways
- Corporate Network Infrastructure
- Remote Office Connectivity
- Voice & Data Networks
- Hybrid WAN Deployments
- Application-Aware Networking
- Distributed Enterprise Networks
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