ISR4351/K9
ISR 4351 with 3 onboard GE, 3 NIM slots, 1 ISC slot, 2 SM slots, 4 GB Flash Memory default, 4 GB DRAM default
The Cisco ISR4351/K9 is a reliable, modular 400Mbps branch router with integrated services, dual power supply, and performance licensing.
ISR4351/K9 Overview
The Cisco ISR4351/K9 is a mid-range branch office router delivering up to 400Mbps performance. It integrates essential services onto a single, secure platform to reduce operational costs.
The Cisco ISR4351/K9 allows deploying concurrent WAN, security, unified communications and application services. It provides gigabit network connections along with modular enhancements. The router runs Cisco IOS XE software with service activation on demand.
With the performance license, the router capacity can be doubled from 200Mbps default to 400Mbps maximum. The Cisco ISR4351/K9 secures branch investments with reliability features like redundant power supply, hardware stacking, and WAN link resiliency.
Quick Specifications
| Feature | Description |
|---|---|
| Routing Performance | Up to 400Mbps with performance license |
| WAN Ports | 3x Gigabit Ethernet (up to 3 with SFP) |
| LAN Ports | 3x Gigabit Ethernet (up to 3 with SFP) |
| Slots | 3 NIM slots, 2 SM slots, 1 ISC slot |
| Memory | 4GB default, up to 16GB DRAM |
| Power Supply | Internal redundant AC/DC/PoE |
| Rack Units | 2RU |
| Software | Modular Cisco IOS XE |
ISR4351/K9 Details and Highlights
- Integrated Services: Natively supports optimization, security, voice, and cloud connectivity.
- Gigabit Performance: Routes up to 400Mbps with license, 200Mbps default.
- Modular Design: Slots for network modules, service modules, and integrated cards.
- Reliability Features: Redundant power supply, hardware stacking support, link resiliency.
- Simplified Management: Cisco IOS XE software with universal image and licensing.
Comparison to Similar Models
| Feature | ISR 4351 | ISR4331/K9 | ISR4321/K9 |
|---|---|---|---|
| Performance | 400Mbps | 300Mbps | 100Mbps |
| Rack Units | 2RU | 1RU | 1RU |
| Power Supply | Dual | Single | Single |
| NIM Slots | 3 | 2 | 2 |
| SM Slots | 2 | 1 | 0 |
Full Specifications
| Feature | ISR 4351 Specifications |
|---|---|
| Routing Performance | Up to 400Mbps aggregate with license |
| Ports | 3x Gigabit Ethernet (up to 3 with SFP) |
| Slots | 3 NIM slots, 2 SM slots, 1 ISC slot |
| Memory | 4GB default, up to 16GB DRAM |
| Power Supply | Internal redundant AC/DC/PoE |
| Dimensions | 3.5 x 17.25 x 18.5 in (88.9 x 438.15 x 469.9 mm) |
| Rack Height | 2RU |
| Weight | 13.5 lb (6.2 kg) |
| Software | Cisco IOS XE Software |
| Licensing | IP Base, Performance, Security, AppX, UC |
Supported Modules and Accessories
| Module Type | Supported Options |
|---|---|
| NIMs | T1/E1, T3/E3, Serial, xDSL, Gigabit Ethernet |
| Service Modules | VPN, Optimization, Network Analysis, Firewall, Content Filtering |
| Accessories | SFPs, power supply, faceplates, rack mounts |
ISR4351/K9 Licensing
The Cisco ISR4351/K9 uses Cisco IOS XE Software with licensing:
- IP Base included by default
- Performance license to double the throughput
- Optional Security, Unified Communications, and AppX licenses
Installation and Deployment
- Designed for easy 19″ or 23″ rack mounting
- Redundant power supply for high availability
- Supports Smart Licensing and Cisco DNA Center
- Cisco installation services available
Compliance and Safety
- UL 60950-1 safety certified
- EMC emissions compliance to Class A standards
- Meets NEBS shock and vibration requirements
Warranty and Support
- 90 day limited hardware warranty
- IOS software warranty with Cisco support contracts
- 24×7 technical support available through Cisco SMARTnet
ISR4351/K9 End of Life Policy
- Minimum 6 months’ notice for hardware end-of-life
- Minimum 12 months’ notice for software end-of-support
- More details at Cisco EOL Policy
Brand
Cisco Systems
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