| Product Type | Integrated Services Router |
| Model | Cisco ISR 4351 |
| Form Factor | 2RU Rack-mountable |
| Installed RAM | 4 GB |
| Flash Memory | 4 GB |
| Max DRAM Supported | 16 GB |
| Power Supply Type | Internal AC |
| Power Input | 100 to 240 VAC, 50 to 60 Hz |
| Redundant Power Supply Support | Yes (optional) |
| Maximum Power Consumption | 200 Watts |
CISCO ISR 4351 Bundle with UC & SEC Licenses, 4GB RAM, Gigabit Ethernet

Key Benefits
AI-Powered Summaries from Online Customer Reviews
Eye-Insights™ are generated by proprietary AI that analyzes real online customer reviews to highlight top pros and key product features. While we aim for accuracy, insights are provided “as-is” and individual results may vary.
- Integrated UC and security licensing enables secure, feature-rich branch connectivity out of the box
- Support for dynamic routing and multiple I/O types allows maximum deployment flexibility
- TAA compliance and global voltage compatibility make it suitable for enterprise and government verticals
Product Overview
The CISCO ISR 4351 Bundle (ISR4351-VSEC/K9) is a 2RU wired router engineered for branch deployment, offering 4GB RAM and 4GB Flash to support advanced services. Its UC and security licenses are pre-integrated, ensuring seamless operation for voice and secure applications. This model excels with Gigabit Ethernet ports and advanced routing protocols such as RIP, OSPF, and IS-IS. A variety of interface options (RJ-45, SFP, USB, serial console) enhance configurability, while TAA compliance makes it ideal for regulated environments. Global voltage support and a 90-day warranty round out a versatile branch connectivity solution.
Specifications
Product Overview
Physical & Environmental
| Dimensions (W x D x H) | 17.3 x 19.2 x 3.5 in (439 x 487 x 89 mm) |
| Weight | Approximately 21.1 lbs (9.58 kg) |
| Maximum Operating Temperature | 104°F (40°C) |
| Minimum Operating Temperature | 32°F (0°C) |
| Relative Humidity (Operating) | 10% to 85% non-condensing |
| Relative Humidity (Storage) | 5% to 95% non-condensing |
| Altitude (Operating) | Up to 10,000 ft (3,000 m) |
Cloud Management & Licensing
| Software Licenses Included | Voice and Security (UC and SEC) |
| Management Interface | Cisco IOS XE with CLI & Cisco Prime Infrastructure, Cisco DNA Center (optional) |
| Smart Licensing Support | Yes |
Interfaces
| Integrated WAN Ports | 3 x Gigabit Ethernet (10/100/1000 Mbps) |
| Enhanced Service Module (SM-X) Slots | 2 |
| Network Interface Module (NIM) Slots | 2 |
| Onboard GE WAN Ports | 2 |
| Onboard GE LAN Ports | 3 |
| RJ-45 Console Port | 1 |
| USB 2.0 Ports | 1 |
| USB 3.0 Ports | 1 |
| Auxiliary Port | 1 |
| SFP Ports | 2 |
Compliance & Origin
| TAA Compliance | Yes |
| Country of Origin | BRAZIL / CHINA / MEXICO |
| Certifications | UL 60950-1, IEC 60950-1, CSA 22.2 No.60950-1, FCC Part 15, ICES-003, CE Marking |
Advanced Security Features
| Integrated Security Features | Firewall, VPN, IPS, and Content Filtering |
| Supported VPN Protocols | IPSec, SSL, DMVPN, GETVPN |
| Intrusion Prevention System (IPS) | Yes, with Security License |
| URL Filtering | Yes, via Cisco Cloud Web Security or Umbrella integration |
| Advanced Malware Protection (AMP) | Supported with Cisco AMP for Networks |
| Secure Boot and Image Signing | Yes |
| Zone-Based Policy Firewall | Yes |