Skip to the beginning of the images gallery

ISR4451-X-SEC/K9, Cisco ISR 4451 Security Router, 2xGE/SEC license/4GB DRAM

Name: ISR4451-X-SEC/K9, Cisco ISR 4451 Security Router, 2xGE/SEC license/4GB DRAM
SKU: ISR4451-X-SEC/K9
Price: 13476 USD
Availability: InStock
Rating: 4.8 (22 reviews)

Brand: Cisco
Model: ISR4451-X-SEC/K9
In Stock
- United States
- United Kingdom
- Germany
- United Arab Emirates
- Singapore
- India
- Hong Kong

Rating:

96%

4.8/5.0

22 Reviews

11 Questions

List Price: $30,123.00

55% OFF

$13,476.00

Price Alert

100% Genuine

Original, factory-verified

3-Year Warranty

Extended, enterprise-grade

23 Years Expertise

Proven, deployment-focused

Condition

Original New

Express Shipping to United States
Estimated shipping time: 2–6 business days via DHL, FedEx, UPS and more

Certified Expertise Builds Trust

CCIE · JNCIE · NSE7 · ACDX · HPE Master ASE · Dell Server/AI Expert

Talk to an Expert

Faster Delivery, Globally Ready
20+ years of supply chain expertise for faster multi-stop delivery with smooth customs.
48H Worldwide Shipping
10+ Global Warehouses
Keep Projects On Time
Reliable availability and real-time shipment visibility to keep every critical IT project on schedule.
Track Your Order

Leading Global Distributor
Since 2002
A global ICT bridge delivering authentic hardware and trusted service for over 20 years.

Worry-Free Coverage with RSCare
3-Year warranty for enterprise hardware, including advanced RMA, diagnostics, spare parts support, and OEM service compatibility.
Cisco SmartNet
HPE Foundation Care
Dell ProSupport
Juniper Care
Fortinet Support
Your Trusted Genuine Source
Authorized partnerships with 30+ brands, including Cisco, HPE, Dell, Juniper, and Fortinet.
100% Authentic Products
100,000+ Multi-Brand SKUs Available

ISR4451-X-SEC/K9, Cisco ISR 4451 Security Router, 2xGE/SEC license/4GB DRAM

100% Genuine Ready to Ship

$30,123.00

55% OFF

$13,476.00

Overview

Cisco ISR4451-X-SEC/K9 Overview

ISR4451-X-SEC/K9 is the Cisco 4451 Integrated Services Router, with Security license. It supports 2 Enhanced service-module (SM-X) slots, delivers 1 Gbps to 2Gbps aggregate throughput. This router also supports two kinds of DDRM, data plane and control/services plane, which make administrator easy to manage the router.

Quick Specs

Figure 1 shows the appearance of Cisco ISR4451-X-SEC/K9.

ISR4451-X-SEC/K9 Appearance

Table 1 shows the Quick Specs.

Product Code	ISR4451-X-SEC/K9
Bundle	w/SEC license
Aggregate Throughput	1 Gbps to 2Gbps
Total onboard WAN or LAN 10/100/1000 ports	4
RJ-45-based ports	4
SFP-based ports	4
Enhanced service-module (SM-X) slot	2
NIM (Network Interface Modules) slots	3
Onboard ISC slot	1
DDRM (data plane)	2 GB (default) / 2 GB (maximum)
DDRM (control/services plane)	4 GB (default) / 16 GB (maximum)
Flash Memory	8 GB (default) / 32 GB (maximum)
Power-supply options	Internal: AC, DC (roadmap) and PoE
Rack height	2 RU
Dimensions (H x W x D)	88.9 x 438.15 x 469.9 mm

Product Details

Figure 2 shows the front panel of Cisco ISR4451-X-SEC/K9.

ISR4451-X-SEC/K9 Front Panel

Note:

①	AC power supply unit (PSU0)	④	Router power On/Off switch
②	Router fan tray	⑤	LEDs
③	AC power supply unit (PSU1)

·Router fan tray is hidden behind removable bezel.

·LEDs include 12 indicators.

Figure 3 shows the back panel of Cisco ISR4451-X-SEC/K9.

ISR4451-X-SEC/K9 Back Panel

Note:

①	USB Type A port	⑤	Auxiliary port
②	GE management port	⑥	GE Ports
③	USB Type B mini port	⑦	NIM Slots
④	Console port	⑧	SM-X Slot

·The NIMs support 2 single-wide or 1 double-wide.

·The GE Ports include 4 RJ45 ports and 4 SFP ports.

Figure 4 shows the Security License function.

security bundle

The Modules, Cards, Licenses & Accessories

Table 2 shows some recommended modules, cards, licenses and several cables.

Items	Models	Descriptions
Console and Auxillary Cables	CAB-AUX-RJ45	Cisco CAB-AUX-RJ45 Auxiliary Cable 8ft with RJ45 and DB25M
	CAB-ETH-S-RJ45	Cisco Router Cable CAB-ETH-S-RJ45
	CAB-CONSOLE-RJ45	Cisco CAB-CONSOLE-RJ45 Console Cable 6ft with RJ45 and DB9F
	CAB-CONSOLE-USB	Cisco CAB-CONSOLE-USB Console Cable 6 ft with USB Type A and mini-B
Licenses	L-SL-44-APP-K9=	Cisco ISR 4431/4451 AppX license L-SL-44-APP-K9= with WAAS/vWAAS 1300/2500 conns RTU
Licenses	FL-44-PERF-K9	Increases the performance from base performance 1 Gbps to 2 Gbps
Voice Network Interface Modules	NIM-1MFT-T1/E1	Cisco Fourth-Generation Multiflex Trunk Voice and WAN network interface module
	NIM-2CE1T1-PRI	Cisco Multiflex Trunk Voice and WAN network interface module
	NIM-4E/M	Analog voice network interface card (ear and mouth)
	NIM-2FXS	Cisco Analog voice network interface card NIM-2FXS
	NIM-2FXS/4FXO	Cisco Analog voice network interface card NIM-2FXS/4FXO
	NIM-8MFT-T1/E1	Cisco Fourth-Generation Multiflex Trunk Voice and WAN network interface module
Gigabit Ethernet WAN Modules	NIM-1GE-CU-SFP	Cisco 1-Port Gigabit Ethernet WAN Network Interface Module
	NIM-2GE-CU-SFP	Cisco 2-Port Gigabit Ethernet WAN Network Interface Module
	SM-X-6X1G	Cisco 6-Port High-Density Gigabit Ethernet WAN Service Module
	SM-X-4X1G-1X10G	Cisco 4-Port High-Density Gigabit or 1-Port 10 Gigabit Ethernet WAN Service Module
Gigabit Ethernet LAN Switch Network Interface Modules	NIM-ES2-4=	4-port Layer 2 Gigabit Ethernet LAN Switch NIM
	NIM-ES2-8	8-port Layer 2 Gigabit Ethernet LAN Switch NIM
	NIM-ES2-8-P	8-port PoE/PoE+ Layer 2 Gigabit Ethernet LAN Switch NIM
SFPs for On-Board GE Ports	GLC-SX-MMD	Cisco GLC-SX-MMD 1000BASE-SX SFP transceiver module, MMF, 850nm, DOM
	GLC-LH-SMD	Cisco GLC-LH-SMD 1000BASE-LX/LH SFP transceiver module, MMF/SMF, 1310nm, DOM
	GLC-ZX-SMD	Cisco GLC-ZX-SMD 1000BASE-ZX SFP transceiver module, SMF, 1550nm, DOM

Compare to Similar Items

Table 3 shows the comparison.

Models	ISR4451-X/K9	ISR4451-X-SEC/K9
Bundle	None	Sec bundle w/SEC license
Aggregate Throughput	1 Gbps to 2 Gbps	1 Gbps to 2 Gbps
Total onboard WAN or LAN 10/100/1000 ports	4	4
RJ-45-based ports	4	4
SFP-based ports	4	4
Enhanced service-module slots	2	2
NIM slots	3	3
Onboard ISC slot	1	1
Rack height	2	2

Get more information

Do you have any question about the Cisco ISR4451-X-SEC/K9

Quality Certifications

Specification

Cisco ISR4451-X-SEC/K9 Specification

Model

ISR4451-X-SEC/K9

Brand

Cisco

Description

Cisco ISR 4451 Sec bundle w/SEC license

Aggregate Throughput

1 Gbps to 2 Gbps

Total onboard WAN or LAN 10/100/1000 ports

RJ-45-based ports

SFP-based ports

Enhanced service-module slots

Doublewide service-module slots

1 (assumes no singlewide SM-X modules installed)

NIM slots

OIR (all I/O modules)

Yes

Onboard ISC slot

Default memory DDR3 ECC DRAM (data plane)

2 GB

Maximum memory DDR3 ECC DRAM (data plane)

2 GB

Default memory DDR3 ECC DRAM (control/services plane)

4 GB

Maximum memory DDR3 ECC DRAM (control/services plane)

16 GB

Default flash memory

8 GB

Maximum flash memory

32 GB

External USB 2.0 slots (type A)

USB console port -type B mini (up to 115.2 kbps)

Serial console port - RJ45 (up to 115.2 kbps)

Serial auxiliary port - RJ45 (up to 115.2 kbps)

Power-supply options

Internal: AC, DC and PoE

Redundant power supply

Internal: AC, DC and PoE

AC input voltage

100 to 240 VAC autoranging

AC input frequency

47 to 63 Hz

AC input current range, AC power supply (maximum)

7.1 to 3.0 A

AC input surge current

<50 A

Typical power (no modules) (watts)

158 W

Maximum power with AC power supply (watts)

450 W (no PoE)

Maximum power with PoE power supply (platform only) (watts)

1000 W with PoE redundant, 1450 W with PoE boost no redundancy

Maximum endpoint PoE power available from PoE power supply (watts)

500 W with optional redundancy

Maximum endpoint PoE power capacity with PoE boost (watts)

950 W no redundancy

Get More Information

Discover unbeatable prices and fast shipping for the ISR4451-X-SEC/K9 . Access the detailed ISR4451-X-SEC/K9 datasheet and ensure you're getting the best deal with our reliable delivery service. Need assistance? Our free live chat support is here to help. For more information about the product and pricing, contact us via live chat or email us at [email protected].

Quality Certifications

Need Help? Technical Experts Available Now.

+1-626-655-0998 (USA)
UTC 15:00-00:00
+852-2592-5389 (HK)
UTC 00:00-09:00
+852-2592-5411 (HK)
UTC 06:00-15:00

Get a Quote

Live Chat

Need Help? Technical Experts Available Now.

Customer Reviews

Write Your Own Review

Only registered users can write reviews. Please Sign in or create an account

Q&A

Questions & Answers

What accessories are available for this router?

Accessories include power supply options, rack mount kits, additional network interface modules, and memory upgrades.

How does ISR4451-X-SEC/K9 compare to ISR4331?

The ISR4451-X-SEC/K9 offers higher performance and more expansion options compared to the ISR4331, suiting larger network needs better.

Is it easy to configure the ISR4451-X-SEC/K9?

Yes, configuring the ISR4451-X-SEC/K9 is straightforward using the Cisco IOS XE interface and CLI, with extensive documentation available.

Are the products sold on router-switch.com authentic?

Yes, router-switch.com only sells 100% genuine products from authorized brands. As a multi-brand authorized distributor, all items are sourced through official channels and include valid manufacturer warranties. Customers may verify authorization via brand websites or request certification documents.

Learn More

Is the ISR4451-X-SEC/K9 cost-effective?

Yes, the Cisco ISR4451-X-SEC/K9 provides high performance with its security license, making it cost-effective for enterprises.

What are the main features of this router?

The ISR4451-X-SEC/K9 includes a security license bundle, substantial throughput, integrated WAN optimization, and modular design.

Where is the ISR4451-X-SEC/K9 best applied?

This router is ideal for medium-to-large enterprise branch deployments requiring robust security and high performance.

How do I install the ISR4451-X-SEC/K9?

Installation involves mounting the device, connecting it to the network, and configuring using IOS XE. Always refer to the installation guide.

Does the ISR4451-X-SEC/K9 need regular upgrades?

Yes, it is recommended to regularly update the IOS XE software to ensure the router has the latest features and security patches.

Are there alternative products to ISR4451-X-SEC/K9?

Alternatives include other Cisco ISR 4000 series routers, like the ISR4331-K9 or ISR4321-K9, depending on performance needs.

What common troubleshooting steps are there?

Ensure all cables are connected properly, verify configuration settings, and consult the Cisco support community for specific issues related to ISR4451-X-SEC/K9.

What accessories are available for this router?

Accessories include power supply options, rack mount kits, additional network interface modules, and memory upgrades.

How does ISR4451-X-SEC/K9 compare to ISR4331?

The ISR4451-X-SEC/K9 offers higher performance and more expansion options compared to the ISR4331, suiting larger network needs better.

Is it easy to configure the ISR4451-X-SEC/K9?

Yes, configuring the ISR4451-X-SEC/K9 is straightforward using the Cisco IOS XE interface and CLI, with extensive documentation available.

Are the products sold on router-switch.com authentic?

Warranty

Your Trusted Global ICT Partner
Delivering reliable, cross-border fulfillment with 20+ years of expertise, backed by rigorous QC, fast logistics, and worldwide warehousing.
Global warehousing
10+ hubs positioned for fast international dispatch and stable availability.
Seamless cross-border
QC-verified packing and predictable delivery via FedEx, DHL, UPS.
ICT Tools Hub for Confident Monitoring
Stay informed on product lifecycle status and real-time inventory availability—supporting confident planning, sourcing, and operational execution.
EOL/EOSL Checker
Verify product lifecycle status to plan purchases and avoid EOL/EOSL risks.
Request VIP Inventory Portal Access
Connect via live chat for VIP access to real-time inventory on priority SKUs.
Certified Experts Across Leading Vendors
Professional guidance for network, security & data center builds, delivered by certified experts with extensive, hands-on deployment experience.
Multi-vendor engineering
Certified expertise across Cisco, HPE, Aruba, Dell, Juniper, Huawei and Fortinet.
Deployment-ready guidance
Faster, safer rollouts with project-focused engineering guidance.

The Choice of 21,500 +Global Customers

Industry-Leading Warranty Coverage You Can Trust

100% Low Price Guarantee
Router-switch.com offers genuine, high-quality ICT products at competitive wholesale prices—ensuring exceptional value without compromising quality.
100% Quality Assurance
All items are brand new, original, and factory-sealed.
Upon request, each unit can be fully tested and verified by a Cisco CCIE-certified engineer to ensure perfect working condition before shipment.
100% Money-Back Guarantee
If you are not satisfied with your purchase, you may request an exchange or full refund. Our customer service team will guide you through the return process quickly and smoothly.
Visit Return Policy page for more information.
Free Cisco CCIE Technical Support
Our Cisco CCIE-certified experts provide free professional support via phone, email, online chat, or remote login—helping you deploy and troubleshoot with confidence.
Flexible & Secure Payment and Shipping
We support multiple secure payment and logistics options, backed by industry-leading verification:
Pay by wire transfer.

Pay with your paypal.

Pay with your Visa credit card.

Pay with your Mastercard credit card.

Pay with your Discover Card.

Pay by American Express.
More
Trusted & Secure Payments ×
100% Trusted, Secure Purchase at Router-switch.com
120+ Local Currencies

Multiple Payment Options

100% Secure Payments
Choose the payment method that works for you—local options, multiple currencies, or bank transfers. Every payment is protected by SSL encryption, PCI DSS-level security, McAfee Secure, and VeriSign Secured for complete peace of mind.

Guaranteed Safe Checkout

View Payment Options
Visit How to Pay page for more information

Warranty Coverage & RMA Instructions

Extended, Worry-Free Warranty Coverage
- Factory New Sealed Enterprise Hardware: 3 Years
- Factory New Sealed Consumer Devices: 1 Year
Visit Warranty Policy page for more information
How to Get Support
If you encounter issues with products, please reach out to your dedicated sales representative. They will assist with diagnostics, remote troubleshooting, and RMA processing if necessary.
Visit Contact Us page for more support options.

Best-Fit Solutions for Your Network

Deploy DeepSeek-V3/R1: Powerful AI, Low Cost

Expert-configured AI solution: Same power, 90% savings—multi-scenario flexibility with Dell/Huawei/Lenovo options.

Beyond Bandwidth: The 100G+ Data Center Architecture

The must-have 100G foundation - AI-ready growth, zero-latency performance

Data Center

400G/800G Ethernet Switch: Maxmize Margins via AI-Ready Solutions

High-Profit data center switches from Cisco, Huawei, Mellanox & Juniper.

Ethernet Switch

Download

Resources Downloads

Support and Resources

Transition Guide

Model Datasheet

ISR4451-X-SEC/K9 Datasheet

ISR4451-X-SEC/K9, Cisco ISR 4451 Security Router, 2xGE/SEC license/4GB DRAM

You may also be interested in the following product(s)

Faster Delivery, Globally Ready

Keep Projects On Time

Leading Global Distributor Since 2002

Worry-Free Coverage with RSCare

Your Trusted Genuine Source

ISR4451-X-SEC/K9, Cisco ISR 4451 Security Router, 2xGE/SEC license/4GB DRAM

Cisco ISR4451-X-SEC/K9 Overview

Quick Specs

Product Details

The Modules, Cards, Licenses & Accessories

Compare to Similar Items

Get more information

Quality Certifications

Cisco ISR4451-X-SEC/K9 Specification

Get More Information

Quality Certifications

Need Help? Technical Experts Available Now.

Questions & Answers

What accessories are available for this router?

How does ISR4451-X-SEC/K9 compare to ISR4331?

Is it easy to configure the ISR4451-X-SEC/K9?

Are the products sold on router-switch.com authentic?

Is the ISR4451-X-SEC/K9 cost-effective?

What are the main features of this router?

Where is the ISR4451-X-SEC/K9 best applied?

How do I install the ISR4451-X-SEC/K9?

Does the ISR4451-X-SEC/K9 need regular upgrades?

Are there alternative products to ISR4451-X-SEC/K9?

What common troubleshooting steps are there?

What accessories are available for this router?

How does ISR4451-X-SEC/K9 compare to ISR4331?

Is it easy to configure the ISR4451-X-SEC/K9?

Are the products sold on router-switch.com authentic?

Your Trusted Global ICT Partner

ICT Tools Hub for Confident Monitoring

Certified Experts Across Leading Vendors

The Choice of 21,500 +Global Customers

Best-Fit Solutions for Your Network

Deploy DeepSeek-V3/R1: Powerful AI, Low Cost

Beyond Bandwidth: The 100G+ Data Center Architecture

400G/800G Ethernet Switch: Maxmize Margins via AI-Ready Solutions

Resources Downloads

Product Tags

Related Products

Leading Global Distributor
Since 2002