ISR4351/K9 Cisco ISR 4351 Router
ISR4351/K9ISR4351/K9 Cisco ISR 4351 Router
ISR4351/K9 Overview
The Cisco ISR4351/K9 is part of the Cisco 4000 Series Integrated Services Routers (ISR 4000 Family), designed for medium to large branch offices and enterprise WAN environments.
It integrates high-performance routing, security, unified communications, application services, and WAN optimization into a compact modular chassis.
Powered by a multi-core CPU architecture, the ISR4351 offers modular scalability, high throughput (up to 400 Mbps aggregate performance), and the flexibility to add new network interfaces and services as business needs evolve.
The ISR4351 supports Cisco’s IOS XE operating system, enabling advanced programmability, virtualization, and SD-WAN capabilities.
ISR4351/K9 Specification
| Parameter | Specification / Value |
|---|---|
| Model Number | Cisco ISR4351/K9 |
| Product Type | Integrated Services Router |
| Architecture | Cisco Unified Computing System (UCS) multi-core CPU |
| Performance / Throughput | 200 Mbps default, upgradable to 400 Mbps (with Performance License) |
| Form Factor | 2 Rack Units (2U) |
| Rack Mountable | Yes |
| Integrated Gigabit Ethernet Ports | 3 × 10/100/1000 Mbps (RJ-45/SFP combo ports) |
| Network Interface Module (NIM) Slots | 3 |
| Enhanced Service Module (SM-X) Slots | 2 |
| Integrated Services Card (ISC) Slot | 1 |
| USB Ports | 1 × USB Type A (storage), 1 × mini-USB console |
| Console / Auxiliary Ports | 1 × RJ-45 console, 1 × RJ-45 auxiliary |
| Default DRAM | 4 GB |
| Maximum DRAM | 16 GB |
| Default Flash Memory | 4 GB |
| Maximum Flash Memory | 16 GB |
| Power Supply Options | Internal AC, optional DC or PoE power supply |
| Maximum Power Consumption | Approximately 430 W (fully loaded configuration) |
| Platform PoE Power (with PoE PSU) | Up to 990 W |
| Typical Power Consumption (Base System) | Around 48 W |
| Dimensions (H × W × D) | 88.9 × 438.15 × 469.9 mm (3.5 × 17.25 × 18.5 inches) |
| Weight | Approximately 13 kg (28.6 lbs) |
| Operating Temperature | 0 °C to 40 °C (32 °F to 104 °F) |
| Storage Temperature | -40 °C to 70 °C (-40 °F to 158 °F) |
| Humidity (Operating) | 10% – 85% non-condensing |
| Forwarding Capacity | Up to 500,000 packets per second (approximate) |
| Routing Protocols Supported | Static, RIP, OSPF, EIGRP, BGP, VRRP, Policy-Based Routing |
| Security Features | Stateful Firewall, IPsec VPN, SSL VPN, Intrusion Prevention (IPS), Zone-Based Firewall, Control Plane Protection |
| WAN Optimization | Cisco WAAS Express supported (optional) |
| Voice / Collaboration Support | Integrated DSP slots for voice, SRST, SIP trunking, and Unified Comm |
ISR4351/K9 Warranty
 | Low Price Guarantee |  | Quality Assurance |
 | Free CCIE Expert Technical Support |  | Commodity Refund Guarantee |
 | Diversified and Flexible Transportation Services |  | Standard Policy |
