Cisco ISR4451-X/K9 4451 IntegratedServices Router · 3mth Wty

Cisco ISR4451-X/K9 Integrated Services Router - Certified Refurbished

The Cisco ISR4451-X/K9 Integrated Services Router features high-performance multicore processors with emulated Quantum Flow Processor technology, 4GB DDR3 ECC RAM (expandable to 16GB), 8GB flash storage (expandable to 32GB), and 4x 10/100/1000 Ethernet ports with SFP support, delivering enterprise-grade networking performance from 1Gbps to 2Gbps throughput for demanding business environments. This certified refurbished 2RU rack-mountable router provides advanced routing, unified communications, security features, and extensive expansion capabilities through 2x SM-X slots and 3x NIM slots, making it an exceptional solution for high-capacity branch offices and enterprise deployments.

Ideal For Enterprise Applications

The ISR4451-X excels in high-end enterprise branch offices and corporate headend deployments requiring robust throughput between 1-2Gbps. Perfect for organisations implementing unified collaboration systems, this router seamlessly integrates voice, video, and data services whilst supporting advanced security protocols including DMVPN, Flex VPN, and zone-based firewalls. The platform's versatility extends to WAN acceleration, application optimisation, and Application Visibility and Control (AVC), making it suitable for retail point-of-sale networks, financial institutions requiring secure transaction processing, healthcare facilities managing patient data, and distributed enterprises consolidating branch infrastructure.

Key Features and Benefits

• Scalable Performance Architecture: Distributed multicore processing with separate control and data planes ensures consistent performance under heavy workloads, whilst software-based Performance-on-Demand licensing enables throughput upgrades without hardware replacement
• Enterprise-Grade Expansion: Two SM-X slots supporting up to 10Gbps each, three NIM slots with 2Gbps connections, and onboard ISC slot for PVDM4 voice modules provide exceptional flexibility for growing network demands
• Advanced Security Integration: Hardware-based Trust Anchor technology, AES-256 encryption, zone-based firewall capabilities, and comprehensive VPN support protect critical business data across distributed networks
• Unified Communications Ready: Native support for voice and video services through PVDM4 modules, with optional PoE+ capability on 2 front-panel ports delivering up to 30W per port for IP phones and wireless access points
• Intelligent Traffic Management: Network-Based Application Recognition (NBAR), Quality of Service (QoS), Performance Routing, and hierarchical QoS ensure optimal application performance and bandwidth utilisation
• Comprehensive Routing Protocols: Full IPv4/IPv6 support with OSPF, EIGRP, BGP, IS-IS routing protocols plus multicast capabilities for sophisticated network topologies
• Resilient Design: Hot-swappable modules with Online Insertion and Removal (OIR), redundant power supply options, and high-availability features including stateful switchover minimise network downtime
• Modern Network Management: Cisco IOS XE operating system delivers Linux-based modularity with RESTCONF, NETCONF, and YANG model support for automation and SDN integration

Technical Specifications

• Processor: High-performance multicore processors with Quantum Flow Processor (QFP) data plane
• Memory: 4GB DDR3 ECC RAM (control plane), expandable to 16GB; 2GB data plane memory
• Storage: 8GB internal flash memory, expandable to 32GB
• Network Interfaces: 4x 10/100/1000 Ethernet ports (RJ-45 or SFP), 1x dedicated Gigabit management port
• Expansion: 2x SM-X slots, 3x NIM slots, 1x ISC slot for voice modules
• Throughput: 1-2Gbps aggregate (up to 4Gbps with Boost licence)
• Power Consumption: 158W typical (450W maximum with AC supply, no PoE)
• Dimensions: 88.9mm (H) x 438.15mm (W) x 469.9mm (D) - 2 rack units
• Weight: 13.1kg (base configuration with single 450W AC power supply)
• Operating Temperature: 0°C to 40°C (at 0-2,000m altitude)

Operating System: Cisco IOS XE

This router runs Cisco IOS XE, a modern Linux-based operating system offering significant advantages over traditional router platforms. The modular architecture separates system functions into independent processes, enabling multicore processing capabilities and preventing single process failures from affecting the entire system. IOS XE provides superior scalability for large deployments, robust programmability through APIs for network automation, and simplified software updates through individual package upgrades rather than complete system reimaging. The platform supports advanced features including software-defined networking (SDN) integration and intent-based networking through Cisco DNA Centre.

Whilst IOS XE delivers substantial benefits, the increased architectural complexity requires administrators to understand both Linux fundamentals and traditional Cisco IOS concepts. However, the familiar CLI interface ensures experienced network professionals can transition smoothly, and the enhanced automation capabilities ultimately reduce operational complexity in enterprise environments.

Cosmetic Grading Standards

Reboot IT categorises refurbished networking equipment into two grades. Excellent Grade units present in virtually like-new condition with minimal signs of previous use, featuring only very minor scuffing or surface abrasions consistent with light handling. The chassis, ports, and modules show no significant wear, maintaining a near-pristine appearance. Good Grade units are fully functional with signs of normal professional use, potentially including light scratches on the chassis, minor wear around port areas, or small cosmetic marks that do not affect structural integrity or performance. Both grades undergo identical functional testing and meet the same operational standards.

Quality Assurance and Warranty

Every Cisco ISR4451-X/K9 router from Reboot IT undergoes comprehensive testing of all features and functions to verify complete operational integrity. Our technicians meticulously examine each network interface, expansion slot, routing protocol, security feature, and management function against manufacturer specifications. Since 2001, Reboot IT has been an industry expert in refurbishing enterprise networking equipment, utilising cutting-edge diagnostic software and hardware testing platforms to ensure every device meets exacting standards.

All units are Verified Reboot Refurb through our thorough testing process, which includes multipoint inspection, component validation, firmware verification, thermal stress testing, and performance benchmarking. This certified refurbished router includes a comprehensive 1-year warranty provided by Reboot IT, protecting your investment and ensuring peace of mind for your critical network infrastructure.

Why Choose Refurbished Enterprise Networking

Selecting certified refurbished Cisco networking equipment delivers exceptional value without compromising reliability. Enterprise-grade routers from professional environments have typically received regular maintenance throughout their service life and represent proven technology trusted by organisations worldwide. Reboot IT's rigorous refurbishment process restores these devices to optimal working condition, offering substantial cost savings compared to new equipment whilst maintaining the performance and features required for demanding business applications.

Upgrade your network infrastructure with confidence. This certified refurbished Cisco ISR4451-X/K9 provides enterprise-grade performance, extensive expansion capabilities, and comprehensive security features backed by Reboot IT's 1-year warranty and over two decades of refurbishment expertise.