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Name:
ISR4351-SEC/K9
- Description:
- 200Mbps-400Mbps system throughput, 3 WAN/LAN ports, 3 SFP ports, multi-Core CPU,2 service module slots, Security, VPN, WAAS, Intelligrnt WAN, OnePK, AVC
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3 - List Price:
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$14,195.00
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$6,349.00
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ISR4351-SEC/K9
200Mbps-400Mbps system throughput, 3 WAN/LAN ports...
$14,195.00
$6,349.00
39 in Global Warehouse
$6,349.00
55% off
TRUSTED, TRIED, PROVEN
ISR4351-SEC/K9 Overview
ISR4351-SEC/K9 is a high-performance branch router engineered with a modular architecture that integrates advanced security and unified communications services. Designed for enterprise and business use cases, it offers multiple power options including AC with redundancy, robust WAN/LAN interfaces featuring dual WAN and four LAN ports, and built-in VPN capabilities with IPSec, SSL VPN, DMVPN, and FlexVPN support to securely connect distributed networks.
ISR4351-SEC/K9 delivers excellent throughput capacity with gigabit Ethernet performance, ensuring reliable connectivity and low latency for mission-critical applications. It includes integrated services such as voice, video, and WAN optimization; supports high availability through redundant power supply; and provides flexible expansion with two modular slots for additional interface modules, making it an ideal choice for secure branch connectivity and enterprise deployments.
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ISR4351-SEC/K9 Specifications
| Product Type | Enterprise Router |
| VPN Support | IPSec / SSL VPN / DMVPN / FlexVPN |
| Power Source | AC Power Supply / Redundant |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing |
| Broadband | N/A |
| Architecture | Modular |
| WAN Configuration | Dual WAN |
| WAN Ports | 2 WAN |
| LAN Ports | 4 LAN Ports |
| Ethernet Technology | 10/100/1000 |
| Wi-Fi Standard | N/A |
| Connectivity Type | Wired |
| Network Protocols | IPv4 / IPv6 |
| Remote Management | SSH / Telnet / SNMP |
| Compliance Standards | FCC / CE |
| Wireless Support | No |
| Speed/Capacity | Gigabit |
| Firewall Features | Yes |
| Features | VPN / IPv6 Compatible / Firewall / Integrated Security |
| Use Case | Enterprise / Business |
| Management | Managed |
| Form Factor | Rack-mount |
| Integrated Services | Voice / Video / WAN Optimization |
| High Availability Support | Supported |
| Safety | N/A |
| EMC | N/A |
| Telecom | N/A |
| Throughput Capacity | 0.075 Gbps |
| QoS Features | Supported |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection |
| Expansion Slots | EHWIC / NIM |
| Modular Slots Available | 2 Slots |
| Stacking Capability | No |
| 5G Support | No |
| Memory | 1 GB |
| Flash Memory | 256 MB |
| Interface Ports | RJ-45 / SFP |
| Power | 150 W |
| Device Type | Router |
| Product Name | Cisco ISR4351 Integrated Services Router with Enhanced Security (ISR4351-SEC/K9) |
| Height | 1.73 inches |
| Width | 17 inches |
| Depth | 15 inches |
| Weight | 14 lbs |
ISR4351-SEC/K9 Use Case
High-Performance SD-WAN Deployment for Multi-Branch Retail Networks
Retail enterprises deploy the Cisco ISR4351-SEC/K9 to harness 200 Mbps–400 Mbps system throughput across 3 WAN/LAN ports and 3 SFP ports with Intelligent WAN and AVC for dynamic path selection over MPLS, broadband and 4G links. The multi-core CPU and 2 service-module slots host integrated Security, VPN and WAAS to secure and accelerate point-of-sale, inventory and POS applications. Benefit: Delivers up to 50% lower transport costs, 30% faster application response times and consistent SLA adherence at every branch.
Secure Data Center Aggregation and Interconnect Gateway
Global data centers rely on the ISR4351-SEC/K9 as a consolidation point using its multi-core CPU, 3 SFP fiber uplinks and dual service-module slots loaded with advanced firewall and WAAS modules. Integrated Security, Site-to-Site VPN and AVC provide encrypted data replication and application-aware traffic shaping at 200 Mbps–400 Mbps. Benefit: Ensures end-to-end data protection, boosts replication efficiency by 25% and simplifies orchestration via Cisco OnePK programmability.
Unified Communications and Remote Workforce Hub
Corporate branches and telework hubs leverage the ISR4351-SEC/K9 to support secure VPN access for 500+ users, multimode voice/video via AVC and intelligent link failover across its 3 WAN/LAN ports. Cisco WAAS accelerates large file transfers, while Intelligent WAN automates QoS policies. The multi-core CPU and service-module slots enable OnePK-driven custom network services. Benefit: Delivers 40% lower VoIP/video latency, seamless UC experiences and rapid, secure remote-site deployment.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Modular | Fixed | Modular | Fixed |
| Broadband | N/A | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | FCC / CE / RoHS | FCC / CE | IEEE 802.3, FCC, CE | FCC, CE | FCC, CE, RoHS |
| Connectivity Type | Wired / Ethernet | Wired | Wired | Wired | Wired / Wireless / Ethernet |
| Depth | 18.8 inches | 15 inches | 11.3 inches | 18 inches | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | CISPR 22 | N/A | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | EHWIC / NIM | EHWIC / NIM | EHWIC | EHWIC / NIM | EHWIC, NIM |
| Features | VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN / IPv6 Compatible / Firewall / Integrated Security | VPN / IPv6 Compatible / Firewall | VPN, VoIP, IPv6 Compatible, Firewall, MPLS | VPN, Voice, Video, IPv6 Compatible, Firewall, POE, Integrated Services |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 2 GB | 256 MB | 1 GB | 2 GB | 1 GB |
| Form Factor | Rack-mount | Rack-mount | Desktop | Rack-mount | Rack-mount |
| Height | 1.73 inches | 1.73 inches | 1.73 inches | 1.75 inches | N/A |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video | Voice / Video / WAN Optimization | Voice / Video | Voice, Video, WAN Optimization | Voice, Video, WAN Optimization |
| Interface Ports | RJ-45 | RJ-45 / SFP | RJ-45 | RJ-45, SFP, Combo Ports | RJ-45, SFP, Combo Ports |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | Modular LAN | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 4 GB | 1 GB | 1 GB | 4 GB | 4 GB |
| Modular Slots Available | 3+ Slots | 2 Slots | 1 Slot | 3+ Slots | 2 Slots |
| Network Protocols | IPv4 / IPv6 | IPv4 / IPv6 | IPv4, IPv6 | IPv4, IPv6 | OSPF, BGP, EIGRP, RIP, Static Routing |
| Power | 60 Watt | 150 W | 65W | 250 W | 350 W |
| Power Source | AC Power Supply / DC Power Supply / Redundant / N/A | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply with Redundant Option |
| Product Name | Cisco ISR 4351-K9 Integrated Services Router | Cisco ISR4351 Integrated Services Router with Enhanced Security (ISR4351-SEC/K9) | Cisco ISR 4221-SEC/K9 | Cisco 4451 Integrated Services Router | ISR4461-AX/K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH / Telnet / SNMP | SSH / Telnet / SNMP | SSH, Telnet, SNMP | CLI, SNMP, Telnet, SSH | CLI, HTTP, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing / N/A | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing / MPLS | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | UL, cUL | N/A | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | No | No | No | No | Yes |
| Telecom | N/A | N/A | FCC Part 15 | N/A | N/A |
| Throughput Capacity | 75 Mbps | 0.075 Gbps | 300 Mbps | 2 Gbps | 1 Gbps |
| Use Case | Enterprise | Enterprise / Business | Enterprise | Enterprise | Enterprise / Branch Office |
| VPN Support | IPSec / SSL VPN / GRE / DMVPN / FlexVPN / N/A | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / GRE / DMVPN / FlexVPN / N/A | IPSec / SSL VPN / DMVPN / FlexVPN / N/A |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | Modular WAN | 2 WAN |
| Weight | 15 lbs | 14 lbs | 8.6 lbs | 23 lbs | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | WiFi 6 (802.11ax) |
| Width | 17.3 inches | 17 inches | 17.2 inches | 17.5 inches | N/A |
| Wireless Support | No | No | No | No | Yes |
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Questions & Answers
Q
What is the sustained throughput of the ISR4351-SEC/K9 router?
A
The ISR4351-SEC/K9 delivers 200 Mbps of aggregate throughput under standard conditions and can burst up to 400 Mbps for peak performance.
Q
How many WAN and LAN interfaces are available on this router?
A
This model includes three integrated configurable Gigabit Ethernet ports that can function as WAN or LAN interfaces to support flexible network designs.
Q
Can I connect fiber links to the ISR4351-SEC/K9?
A
Yes, the router features three SFP ports for optical connectivity, supporting both single-mode and multi-mode fiber modules.
Q
What CPU architecture powers the ISR4351-SEC/K9?
A
It is equipped with a multi-core CPU that optimizes concurrent tasks, ensuring high performance for security, routing, and WAN acceleration.
Q
How many service module slots does the ISR4351-SEC/K9 offer?
A
The router provides two onboard service module slots to add functionality such as voice gateways, WAN optimization modules, or additional security services.
Q
What built-in security features are included?
A
This router integrates advanced firewall, intrusion prevention (IPS), malware defense, and content filtering to protect against modern threats at line rate.
Q
Does the ISR4351-SEC/K9 support VPN connections?
A
Yes, it supports high-performance IPsec VPN, DMVPN, FlexVPN, and SSL VPN with hardware acceleration for secure site-to-site and remote access.
Q
What is Cisco WAAS and is it supported?
A
Cisco Wide Area Application Services (WAAS) accelerates application performance across the WAN, and this router includes full WAAS support for improved responsiveness.
Q
How does Intelligent WAN (IWAN) enhance network reliability?
A
IWAN automatically monitors link health and dynamically steers traffic over the best available path, ensuring high availability and optimized performance.
Q
What is OnePK and how does it benefit network management?
A
Cisco One Platform Kit (OnePK) is an open API toolkit that enables custom programmability of network services, simplifying automation and policy orchestration.
Q
Is Application Visibility and Control (AVC) available on this router?
A
Yes, AVC provides real-time monitoring, classification, and policy control of over 1,000 applications, empowering traffic prioritization and SLA enforcement.
Q
Can I upgrade the ISR4351-SEC/K9’s features post-deployment?
A
Absolutely. Cisco’s IOS XE software licensing allows on-the-fly feature activation, enabling you to add security, collaboration, or WAN services as needed.
Q
What power options are supported?
A
The router supports AC power by default and offers an optional DC power supply for deployment in varied environments, including harsh or telecom-grade sites.
Q
How scalable is the ISR4351-SEC/K9 for growing branch needs?
A
With modular service slots, software licensing upgrades, and robust CPU capacity, it scales seamlessly to support additional services and higher application demands.
Q
What management tools are available for monitoring?
A
You can manage the router using Cisco DNA Center, Cisco Prime Infrastructure, or RESTCONF/YANG APIs for comprehensive visibility, analytics, and policy control.
Q
What warranty and support options are offered?
A
The router includes a limited lifetime hardware warranty and is eligible for Cisco SMARTnet support for next-business-day hardware replacement and 24×7 technical assistance.
