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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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ISR4451-X-AX/K9
1Gbps-2Gbps system throughput, 4 WAN/LAN ports, 4...
$34,123.00
$16,807.00
23 in Global Warehouse
$16,807.00
51% 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?
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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 |
ISR4451-X-AX/K9 Use Case
Enterprise Branch Office Resilient WAN Edge with Cisco ISR4451-X-AX
A global enterprise deploys the ISR4451-X-AX router to deliver 1–2 Gbps system throughput across four WAN/LAN and four SFP fiber ports, backed by dual-power modules and separate control, data and services CPUs. Integrated Security, Voice, WAAS, Intelligent WAN, OnePK and AVC ensure encrypted VPN failover, application acceleration and programmability, driving 99.99% uptime and optimal performance for mission-critical applications.
Secure, Accelerated Retail Edge with Integrated Voice and Application Optimization
A national retail chain leverages the ISR4451-X-AX at 1–2 Gbps throughput with four WAN/LAN ports, four SFP uplinks and multi-core CPU to connect POS systems and IP phones. Cisco WAAS accelerates inventory and checkout apps while built-in Security, Voice, AVC and Intelligent WAN deliver low-latency voice quality, PCI DSS compliance and a seamless customer shopping experience.
Multi-Tenant Cloud Gateway for Managed Service Providers
An MSP uses the ISR4451-X-AX with 1–2 Gbps throughput, four WAN/LAN ports, four SFP ports, multi-core processing and separate control/data/service CPUs to host secure VPNs for multiple tenants. Intelligent WAN, OnePK programmability, AVC and Cisco Security automate QoS, granular traffic steering and threat protection, enabling scalable service delivery and SLA assurance for each customer.
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 | 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 / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection |
| Compliance Standards | FCC / CE / RoHS | FCC, CE, RoHS | FCC / CE / RoHS | FCC / CE | FCC, CE |
| Connectivity Type | Wired | Wired | Wired / Ethernet | Wired | Wired |
| Depth | N/A | 16.3 inches | 18.8 inches | 16.90 inches | 15 inches |
| Device Type | Router | Router | Router | Router | Router |
| EMC | EN 55032 / EN 55024 | FCC | N/A | FCC / CE | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | EHWIC / NIM | NIM / EHWIC / SFP+ | EHWIC / NIM | EHWIC / NIM | EHWIC |
| Features | VPN / Firewall / IPv6 Compatible | VPN / VoIP / IPv6 Compatible / Firewall | VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN / VoIP / IPv6 Compatible / Firewall / MPLS / Syslog | VPN / IPv6 Compatible / Firewall / MPLS |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 512 MB | 2 GB | 512 MB | 512 MB |
| Form Factor | Desktop | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | N/A | 1.73 inches | 1.73 inches | 1.75 inches | 1.75 inches |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice / Video | Voice / Video | Voice / Video |
| Interface Ports | RJ-45 | RJ-45 / SFP+ | RJ-45 | RJ-45 / SFP | RJ-45 / SFP |
| 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 | 4 GB | 4 GB |
| Modular Slots Available | 2 Slots | 2 Slots | 3+ Slots | 3 Slots | 3+ Slots |
| Network Protocols | IPv4 / IPv6 | IPv4, IPv6 | IPv4 / IPv6 | IPv4 / IPv6 / MPLS | IPv4, IPv6 |
| Power | 65W | 275 W | 60 Watt | 350W | 200 Watts |
| Power Source | AC Power Supply / DC Power Supply / Redundant | AC Power Supply / DC Power Supply / Redundant | AC Power Supply / DC Power Supply / Redundant / N/A | AC Power Supply / Redundant | AC Power Supply |
| Product Name | Cisco ISR 4221 Integrated Services Router | Cisco ISR 4431 Integrated Services Router (K9) | Cisco ISR 4351-K9 Integrated Services Router | Cisco ISR4451-X-AX/K9 | ISR4321-DNA |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH / Telnet / SNMP | CLI / SNMP / NETCONF / RESTCONF | SSH / Telnet / SNMP | Cisco IOS XE CLI / SNMP / NetConf | Cisco DNA Center, CLI, Web UI |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing / N/A | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | UL / CUL | UL | N/A | UL / CSA | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | No | No | No | No | No |
| Telecom | ITU-T | N/A | N/A | N/A | N/A |
| Throughput Capacity | 300 Mbps | 0.2 Gbps | 75 Mbps | 2 Gbps | 0.3 Gbps |
| Use Case | Business | Enterprise | Enterprise | Enterprise | Enterprise / Business |
| VPN Support | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / GRE / DMVPN / FlexVPN | IPSec / SSL VPN / GRE / DMVPN / FlexVPN / N/A | IPSec / 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 | 2 WAN | 2 WAN |
| Weight | N/A | 31 lbs | 15 lbs | 17.6 lbs | 11 lbs |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | 17.2 inches | 17.3 inches | 17.32 inches | 17 inches |
| Wireless Support | No | No | No | No | No |
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Questions & Answers
Q
What is the system throughput of the Cisco ISR4451-X-AX/K9?
A
The Cisco ISR4451-X-AX/K9 delivers 1 Gbps to 2 Gbps of aggregate system throughput, ensuring high-performance WAN and LAN data processing for demanding branch networks.
Q
How many and what types of WAN/LAN ports are available on the ISR4451-X-AX/K9?
A
The ISR4451-X-AX/K9 features four integrated Gigabit Ethernet ports that can be configured as WAN or LAN interfaces to flexibly address branch connectivity needs.
Q
Does the ISR4451-X-AX/K9 support SFP ports for fiber connectivity?
A
Yes, it includes four Gigabit SFP ports, enabling seamless integration with fiber or copper-based SFP transceivers for extended reach and high-speed uplinks.
Q
What CPU architecture powers the Cisco ISR4451-X-AX/K9?
A
The ISR4451-X-AX/K9 is driven by a multi-core Intel CPU design that separates control, data, and services processing for optimized performance under mixed workloads.
Q
Does the ISR4451-X-AX/K9 support dual power supplies for redundancy?
A
Yes, it offers dual-power supply support with hot-swappable modules to ensure continuous uptime and eliminate single points of failure.
Q
What security features are built into the Cisco ISR4451-X-AX/K9?
A
It integrates hardware-accelerated encryption, firewall, intrusion prevention (IPS), VPN, and advanced malware protection to safeguard branch operations.
Q
Can the ISR4451-X-AX/K9 handle enterprise-grade voice services?
A
Yes, it supports native voice gateways, SIP trunking, MGCP and H.323, plus codec transcoding and conferencing for secure, high-quality VoIP deployment.
Q
Does the router support Cisco WAAS for WAN optimization?
A
The ISR4451-X-AX/K9 includes integrated WAAS capabilities to accelerate applications, reduce bandwidth consumption, and improve user experience across the WAN.
Q
What intelligent WAN (IWAN) features does the ISR4451-X-AX/K9 offer?
A
It delivers Intelligent WAN features such as performance routing (PfR), dynamic path control, and telemetry for resilient, optimized multi-path connectivity.
Q
Is Cisco OnePK programmability available on the ISR4451-X-AX/K9?
A
Yes, the ISR4451-X-K9 supports Cisco OnePK, enabling developers to create custom control applications via open APIs for network programmability.
Q
How does Application Visibility and Control (AVC) work on this router?
A
AVC uses hardware-based deep packet inspection to identify, monitor, and prioritize critical applications, ensuring SLA compliance and optimized network performance.
Q
How are the control plane, data plane, and services processing separated?
A
The multi-core CPU architecture isolates control, data, and services engines in dedicated processing units, maximizing throughput and service stability.
Q
What deployment scenarios are best for the ISR4451-X-AX/K9?
A
It’s ideal for large branch offices, distributed enterprises, and data center aggregation points requiring high throughput, advanced security, and voice services.
Q
What licensing options are available for the ISR4451-X-AX/K9?
A
Cisco offers Network Essentials and Network Advantage licenses, plus Security and Unified Communications add-ons, allowing flexible feature activation to match requirements.
Q
Which operating system and management tools does the ISR4451-X-AX/K9 use?
A
It runs Cisco IOS XE with support for eStreamer, Cisco DNA Center, Prime Infrastructure, and CLI/REST APIs for comprehensive network management.
