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Smaller shipments go via DHL or FedEx Express — delivered worldwide in approximately 3 business days.

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Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.

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Tested it, but it’s not a fit?
Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.

Initiate returns with ease.
Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.

Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
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Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.

Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.

RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
ISR4451-X-AX/K9
1Gbps-2Gbps system throughput, 4 WAN/LAN ports, 4...
$16,569.84
25 in Global Warehouse
$16,569.84
52% off
Name: |
ISR4451-X-AX/K9 |
Description: | 1Gbps-2Gbps system throughput, 4 WAN/LAN ports, 4 SFP ports, multi-Core CPU, Dual-power, Security, Voice, WAAS, Intelligrnt WAN, OnePK, AVC, separate control data and services CPUs |
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GTIN: | 882658731594 ![]() |
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List Price: |
![]() $34,520.51 |
Price: |
$16,569.84 52% off |
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Shipping as per your need
Same-day Shipping

Express Delivery Across the USA
Need it fast? Choose Express Shipping and receive your order within 1–3 business days.

Free Ground Shipping Available
Standard ground delivery across the U.S. takes 2–6 days, depending on your location — no extra charge.

International Shipments Made Simple
For all international orders, we ship via your UPS, FedEx, or DHL account — or to your U.S.-based freight forwarder.
Delivery Timelines

Under 100 KG? Ships Express.
Smaller shipments go via DHL or FedEx Express — delivered worldwide in approximately 3 business days.

Over 100 KG? Ships via Freight.
Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.

Always Delivered to Your Door
Every shipment is delivered directly to your address — regardless of country or carrier.
14-Day Money Back Guarantee
Free 14-Day Returns

Tested it, but it’s not a fit?
Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.

Initiate returns with ease.
Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.

Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement

Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.

Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.

RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
ISR4451-X-AX/K9
1Gbps-2Gbps system throughput, 4 WAN/LAN ports, 4...
$16,569.84
33 in Global Warehouse
$16,569.84
52% off
TRUSTED, TRIED, PROVEN







ISR4451-X-AX/K9 Overview
ISR4451-X-AX/K9 is a high-performance, modular enterprise router that delivers advanced integrated services with redundant power options and dual WAN connectivity combined with four built-in LAN interfaces. Designed for robust branch connectivity, it incorporates a comprehensive set of VPN features, stateful firewall capabilities, and integrated voice/video services to secure and optimize communication in mission-critical environments.
Engineered for demanding use cases, this router supports a wide range of routing protocols including OSPF, BGP, EIGRP, and RIP while providing up to 2 Gbps throughput. Its modular architecture, multiple expansion slots, and redundant power configurations ensure superior performance, high availability, and scalable flexibility for enterprise networks, campus branches, and secure remote operations.
What is the price of ISR4451-X-AX/K9?
Lowest price of ISR4451-X-AX/K9 is $ 16,569.84. Shop now discounts with bulk quotation for ISR4451-X-AX/K9
ISR4451-X-AX/K9 Specifications
Product Type | Enterprise Router |
VPN Support | IPSec / DMVPN / FlexVPN / N/A |
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 / MPLS |
Remote Management | Cisco IOS XE CLI / SNMP / NetConf |
Compliance Standards | FCC / CE |
Wireless Support | No |
Speed/Capacity | Gigabit |
Firewall Features | Yes |
Features | VPN / VoIP / IPv6 Compatible / Firewall / MPLS / Syslog |
Use Case | Enterprise |
Management | Managed |
Form Factor | Rack-mount |
Integrated Services | Voice / Video |
High Availability Support | Supported |
Safety | UL / CSA |
EMC | FCC / CE |
Telecom | N/A |
Throughput Capacity | 2 Gbps |
QoS Features | Supported |
Built-in Security Features | Firewall / Intrusion Prevention |
Expansion Slots | EHWIC / NIM |
Modular Slots Available | 3 Slots |
Stacking Capability | No |
5G Support | No |
Memory | 4 GB |
Flash Memory | 512 MB |
Interface Ports | RJ-45 / SFP |
Power | 350W |
Device Type | Router |
Product Name | Cisco ISR4451-X-AX/K9 |
Height | 1.75 inches |
Width | 17.32 inches |
Depth | 16.90 inches |
Weight | 17.6 lbs |
Quality Certifications
To get the detailed certification, please go to the Compliance Center.







Product Comparison Table
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Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
Connectivity Type | Wired | Wired | Wired | Wired | Wired |
Broadband | N/A | N/A | N/A | Fiber Optic / LTE | Fiber Optic |
Power Source | AC Power Supply / Redundant | AC Power Supply | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply with Redundancy |
Architecture | Modular | Fixed | Modular | Modular | Modular |
WAN Configuration | Dual WAN | WAN | Dual WAN | Dual WAN | Dual WAN |
WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
LAN Ports | 4 LAN Ports | Modular LAN | 4 LAN Ports | 8 LAN Ports | 8 LAN Ports |
Ethernet Technology | 10/100/1000 | 10/100 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
Wireless Support | No | No | No | No | No |
Speed/Capacity | 20 Gbps | Gigabit | Gigabit | Gigabit | Gigabit |
Routing Protocols Supported | - | - | - | - | - |
VPN Support | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN | IPSec / DMVPN / FlexVPN / N/A | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN |
Firewall Features | Yes | Yes | Yes | Yes | Yes |
Features | VPN / Firewall / IPv6 Compatible / Redundancy | VPN / Voice / NAT / Firewall | VPN / VoIP / IPv6 Compatible / Firewall / MPLS / Syslog | VPN / IPv6 Compatible / Firewall / MPLS | VPN, IPv6 Compatible, Firewall, MPLS |
Use Case | Enterprise | Enterprise / Small Business | Enterprise | Enterprise | Enterprise |
Management | Managed | Managed | Managed | Managed | Managed |
Form Factor | Chassis | Desktop | Rack-mount | Rack-mount | Rack-mount |
Integrated Services | Voice / WAN Optimization | Voice | Voice / Video | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization |
High Availability Support | Supported | Not Supported | Supported | Supported | Supported |
Throughput Capacity | 20 Gbps | 0.035 Gbps | 2 Gbps | 20 Gbps | 10 Gbps |
QoS Features | Supported | Supported | Supported | Supported | Supported |
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 |
Expansion Slots | NIM / SFP+ | EHWIC | EHWIC / NIM | NIM / SFP+ | NIM |
Modular Slots Available | 3+ Slots | 2 Slots | 3 Slots | 3+ Slots | 3+ Slots |
Stacking Capability | No | No | No | Yes | Yes |
5G Support | No | No | No | No | No |
Memory | 4 GB | 512 MB | 4 GB | 4 GB | 4 GB |
Flash Memory | 512 MB | 256 MB | 512 MB | 512 MB | 512 MB |
Interface Ports | RJ-45 / SFP+ | RJ-45 | RJ-45 / SFP | RJ-45 / SFP | RJ-45, SFP |
Device Type | Router | Router | Router | Router | Router |
Product Name | Cisco ASR1K4R2-20G-SECK9 | Cisco 1861 Integrated Services Router with SRST | Cisco ISR4451-X-AX/K9 | CR5P08BASA7M Advanced Modular Enterprise Router | CR5B00BKPB50 Integrated Services Router |
Height | N/A | 1.72 inches | 1.75 inches | 2 inches | 2.0 inches |
Width | N/A | 17 inches | 17.32 inches | 17 inches | 17 inches |
Depth | N/A | 12 inches | 16.90 inches | 18 inches | 15 inches |
Weight | N/A | 9.5 lbs | 17.6 lbs | 25 lbs | 12 lbs |
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