Cisco ISR4351-AX/K9 Enterprise Router – High-Performance Branch Connectivity

What It Is

The Cisco ISR4351-AX/K9 is an enterprise-class integrated services router from the Cisco ISR 4000 series, designed for medium to large branch offices and WAN aggregation points. This model ships as an AX bundle, pre-configured with Application Experience (APP) and Security (SEC) software licenses, enabling advanced traffic optimization and security services out of the box.

Technical Details

• Form Factor: Modular 2RU chassis, supporting high-density WAN and LAN connectivity.
• Interfaces: 3 built-in GE ports (2 combo, 1 management) for flexible WAN/LAN deployment.
• Module Slots: 2 Network Interface Module (NIM) slots and 2 service module slots for extensibility.
• Memory: 8 GB DRAM (default) and 8 GB flash storage for routing and service processing.
• Performance: Designed to deliver up to 2 Gbps throughput with services enabled (per Cisco ISR 4000 family specifications).
• Licensing: Pre-installed APP and SEC license entitlements, covering application visibility/control and firewall/VPN functionality.
• Routing Protocols: Supports standard IP routing, MPLS, and multicast protocols (per ISR 4000 family software).

Configuration & Options

• Included Bundle: ISR4351-AX/K9 includes the router platform with APP and SEC licenses activated.
• Software: Runs Cisco IOS XE, providing modular and resilient operating system architecture.
• Power Options: Supports AC and DC power supply variants (field-replaceable, optional redundancy).
• Expansion: Compatible with Cisco NIM modules for additional Ethernet, serial, or voice interfaces.
• Management: Supports in-band and out-of-band management via console, auxiliary, or management port.

Operating Conditions

The Cisco ISR4351-AX/K9 is intended for deployment in controlled indoor environments such as enterprise wiring closets, data centers, or network operation centers. It operates within standard temperature and humidity ranges for IT equipment, and is suitable for 19-inch rack mounting. The platform is commonly used as a WAN edge router, supporting branch connectivity and integrated security services in distributed enterprise networks.