United States
Name:
ISR4351/K9
- Description:
- 200Mbps-400Mbps system throughput, 3 WAN/LAN ports, 3 SFP ports, multi-Core CPU,2 service module slots, Security, Voice, WAAS, Intelligrnt WAN, OnePK, AVC
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- Brand:
- Cisco
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- GTIN:
- 818250647957
- Warranty:
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3 - List Price:
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$12,775.00
- Price:
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$1,773.00
86% off
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ISR4351/K9
200Mbps-400Mbps system throughput, 3 WAN/LAN ports...
$12,775.00
$1,773.00
13 in Global Warehouse
$1,773.00
86% off
TRUSTED, TRIED, PROVEN
ISR4351/K9 Overview
ISR4351/K9 is a fixed modular enterprise router engineered with a robust architecture that blends integrated WAN/LAN interfaces with diverse power options including AC and DC with redundancy. It delivers comprehensive integrated services such as voice and video, supports a range of modular capabilities through expansion slots (EHWIC/NIM), and incorporates advanced VPN features including IPSec, SSL VPN, DMVPN, and FlexVPN.
ISR4351/K9 is built for high-performance branch connectivity with dual WAN interfaces and four LAN ports offering Gigabit Ethernet technology. It provides impressive throughput of up to 75 Mbps, redundant power support for high availability, and a suite of security features including firewall, intrusion prevention, and malware protection, making it ideal for enterprise branch deployments and secure site-to-site connections.
What is the price of ISR4351/K9?
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ISR4351/K9 Specifications
| Product Type | Enterprise Router |
| VPN Support | IPSec / SSL VPN / GRE / DMVPN / FlexVPN / N/A |
| Power Source | AC Power Supply / DC Power Supply / Redundant / N/A |
| Routing Protocols | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing / N/A |
| Broadband | N/A |
| Architecture | Fixed |
| 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 / Ethernet |
| Network Protocols | IPv4 / IPv6 |
| Remote Management | SSH / Telnet / SNMP |
| Compliance Standards | FCC / CE / RoHS |
| Wireless Support | No |
| Speed/Capacity | Gigabit |
| Firewall Features | Yes |
| Features | VPN / VoIP / IPv6 Compatible / Firewall / MPLS |
| Use Case | Enterprise |
| Management | Managed |
| Form Factor | Rack-mount |
| Integrated Services | Voice / Video |
| High Availability Support | Supported |
| Safety | N/A |
| EMC | N/A |
| Telecom | N/A |
| Throughput Capacity | 75 Mbps |
| QoS Features | Supported |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection |
| Expansion Slots | EHWIC / NIM |
| Modular Slots Available | 3+ Slots |
| Stacking Capability | No |
| 5G Support | No |
| Memory | 4 GB |
| Flash Memory | 2 GB |
| Interface Ports | RJ-45 |
| Power | 60 Watt |
| Device Type | Router |
| Product Name | Cisco ISR 4351-K9 Integrated Services Router |
| Height | 1.73 inches |
| Width | 17.3 inches |
| Depth | 18.8 inches |
| Weight | 15 lbs |
ISR4351/K9 Use Case
Hybrid WAN Optimization for Distributed Retail Branches
In a global retail chain, the Cisco ISR4351/K9’s 200 Mbps–400 Mbps system throughput, 3 WAN/LAN ports and Intelligent WAN (IWAN) aggregate MPLS, broadband and LTE links to deliver high-availability POS and inventory services. Its multi-core CPU and Application Visibility and Control (AVC) dynamically prioritize checkout and ERP traffic, while WAAS modules accelerate cloud-based promotions. Security services and OnePK APIs enforce consistent policy across sites. Outcome: 40% faster transactions, 30% lower WAN costs and 99.9% branch uptime.
Unified Voice and Secure Communications in Financial Services
A mid-size bank leverages the Cisco ISR4351/K9 with 2 service-module slots populated by voice DSP and security modules, plus 3 SFP fiber ports for redundant data center uplinks. The multi-core CPU sustains simultaneous encryption, voice transcoding and firewall throughput up to 400 Mbps, while AVC and QoS guarantee sub-50 ms call latency. OnePK automation streamlines provisioning and compliance auditing under PCI DSS. Outcome: 99.99% voice uptime, 50% reduction in call drops and robust regulatory compliance.
Secure High-Performance Cloud Edge for Healthcare Networks
A regional hospital deploys Cisco ISR4351/K9 routers at its data centers and clinics to support secure EHR access and telemedicine. Utilizing 3 WAN/LAN ports, 3 SFP ports and Intelligent WAN, clinicians gain resilient, low-latency connectivity to SaaS and EMR platforms. WAAS accelerates patient records, service modules enforce next-gen firewall and encryption, and AVC monitors critical medical applications. Outcome: 25% faster EHR response times, full HIPAA compliance and simplified network management through OnePK orchestration.
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 | Fixed | Modular | Fixed | 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 / Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | FCC / CE / RoHS | FCC / CE / RoHS | FCC / CE / UL | FCC, CE | FCC, CE, RoHS |
| Connectivity Type | Wired | Wired / Ethernet | Wired | Wired | Wired / Wireless / Ethernet |
| Depth | N/A | 18.8 inches | N/A | 18.3 inches | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | EN 55032 / EN 55024 | N/A | FCC C63.10 | CISPR22, FCC Part 15 | 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 / NIM | NIM / EHWIC | EHWIC, NIM |
| Features | VPN / Firewall / IPv6 Compatible | VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN / VoIP / IPv6 Compatible / Firewall / MPLS | Mesh / VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN, Voice, Video, IPv6 Compatible, Firewall, POE, Integrated Services |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 2 GB | 1 GB | 256 MB | 1 GB |
| Form Factor | Desktop | Rack-mount | Rack-mount Chassis | Rack-mount / Desktop | Rack-mount |
| Height | N/A | 1.73 inches | N/A | 1.75 inches | N/A |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice / Video | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 / SFP | RJ-45 / SFP | RJ-45, SFP, Combo Ports |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 4 GB | 4 GB | 4 GB | 512 MB | 4 GB |
| Modular Slots Available | 2 Slots | 3+ Slots | 3+ Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4 / IPv6 | IPv4 / IPv6 | IPv4 / IPv6 | IPv4, IPv6 | OSPF, BGP, EIGRP, RIP, Static Routing |
| Power | 65W | 60 Watt | 305 W | 54 W | 350 W |
| Power Source | AC Power Supply / DC Power Supply / Redundant | AC Power Supply / DC Power Supply / Redundant / N/A | Redundant AC Power Supply | AC Power Supply / Redundant | AC Power Supply with Redundant Option |
| Product Name | Cisco ISR 4221 Integrated Services Router | Cisco ISR 4351-K9 Integrated Services Router | Cisco ISR4451-X Integrated Services Router | Cisco ISR4321-AXV/K9 | 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 | CLI / SNMP / NetFlow | SSH, Telnet, SNMP | CLI, HTTP, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing / N/A | OSPF / BGP / EIGRP / MPLS / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | UL / CUL | N/A | RoHS | RoHS Compliant | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | No | No | Yes | Yes | Yes |
| Telecom | ITU-T | N/A | FCC Part 15 | TIA/EIA | N/A |
| Throughput Capacity | 300 Mbps | 75 Mbps | 2 Gbps | 200 Mbps | 1 Gbps |
| Use Case | Business | Enterprise | Enterprise | Enterprise / Branch | Enterprise / Branch Office |
| VPN Support | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / GRE / DMVPN / FlexVPN / N/A | IPSec / SSL VPN / DMVPN / FlexVPN / N/A | IPSec / SSL VPN / DMVPN / FlexVPN | 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 | 2 WAN | 2 WAN |
| Weight | N/A | 15 lbs | N/A | 13.2 lbs | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | WiFi 6 (802.11ax) |
| Width | N/A | 17.3 inches | N/A | 17.5 inches | N/A |
| Wireless Support | No | No | No | No | Yes |
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Questions & Answers
Q
What is the system throughput of the Cisco ISR4351/K9?
A
The Cisco ISR4351/K9 delivers 200 Mbps of default throughput and can scale up to 400 Mbps with an optional performance license, providing flexible bandwidth for branch deployments.
Q
How many WAN/LAN ports are available on the ISR4351/K9?
A
The ISR4351/K9 includes three integrated 10/100/1000 WAN/LAN ports, allowing simultaneous connectivity to multiple ISPs or internal networks.
Q
What SFP port options does the ISR4351/K9 support?
A
The ISR4351/K9 provides three built-in SFP ports that support both 100 Mbps and 1 Gbps fiber modules, enabling high-speed uplink flexibility.
Q
Which CPU architecture powers the ISR4351/K9?
A
The ISR4351/K9 is driven by a multi-core CPU design that accelerates routing, security and application services without performance bottlenecks.
Q
How many service module slots does the ISR4351/K9 offer?
A
The ISR4351/K9 features two service module slots that accept a variety of network, security, and WAN optimization modules for future-proof extensibility.
Q
What built-in security features are included in the ISR4351/K9?
A
The ISR4351/K9 integrates Cisco IOS® Security with stateful firewall, IPS, VPN, URL filtering, and malware defense, delivering comprehensive branch protection.
Q
Does the ISR4351/K9 support voice and UC services?
A
Yes. The ISR4351/K9 supports Cisco Unified Communications features including SIP, MGCP, and TDM voice gateway capabilities for seamless branch telephony.
Q
How does Cisco WAAS enhance performance on the ISR4351/K9?
A
Cisco WAAS (Wide Area Application Services) on the ISR4351/K9 optimizes application traffic over the WAN by using compression, caching, and protocol acceleration.
Q
What Intelligent WAN (IWAN) features are available on the ISR4351/K9?
A
The ISR4351/K9 supports Cisco Intelligent WAN with dynamic path selection, performance SLA monitoring, and DMVPN for resilient and automated branch connectivity.
Q
What is Cisco OnePK and how does it integrate with the ISR4351/K9?
A
Cisco OnePK is a programmable network API toolkit; on the ISR4351/K9 it enables custom SDN applications and network automation for tailored branch operations.
Q
How does Application Visibility and Control (AVC) work on the ISR4351/K9?
A
AVC on the ISR4351/K9 classifies and prioritizes application traffic in real time, ensuring optimal bandwidth allocation and QoS for critical services.
Q
What are the ideal use cases for the ISR4351/K9?
A
The ISR4351/K9 is ideal for medium-sized branches, retail outlets and distributed enterprises requiring integrated security, voice, and WAN optimization.
Q
Which power supply options are available for the ISR4351/K9?
A
The ISR4351/K9 ships with an internal 100–240 VAC power supply and supports an optional redundant external power supply for high-availability deployments.
Q
What management interfaces does the ISR4351/K9 offer?
A
Management on the ISR4351/K9 is available via Cisco IOS CLI, web-based GUI, SNMP, and Cisco Prime Infrastructure for centralized monitoring and configuration.
Q
What licensing and support options are available for the ISR4351/K9?
A
The ISR4351/K9 uses Cisco Smart Licensing for feature activation and is backed by Cisco SMARTnet® services, offering 24/7 global support and hardware replacement.
