Cisco ISR4451-X4-Port Gigabit Enterprise Router 4400 2RU

Certified Refurbished Cisco ISR4451-X Integrated Services Router - Enterprise-Grade Networking

The Cisco ISR4451-X is a high-performance enterprise router featuring a multicore CPU with Quantum Flow Processor, 4 GB DDR2 ECC control plane RAM (upgradeable to 16 GB), 2 GB data plane memory, 8 GB flash storage (upgradeable to 32 GB), four onboard Gigabit Ethernet ports, and 2RU rack-mountable chassis measuring 88.9 x 438.15 x 469.9 mm. This certified refurbished router delivers enterprise-grade performance for demanding branch offices and regional headquarters requiring application-aware networking, converged services integration, and secure connectivity at a fraction of the cost of new equipment.

Ideal Applications

Built for medium to large branch offices requiring robust WAN connectivity, the ISR4451-X excels in environments demanding SD-WAN deployment, unified communications integration, and multi-site VPN connectivity. The router's modular architecture supports evolving network requirements through optional service modules for wireless connectivity, advanced security appliances, and unified communications services. Organisations implementing hybrid cloud strategies benefit from the platform's ability to integrate on-premises applications with cloud services whilst maintaining security and performance standards.

Performance and Connectivity Features

• High-Speed Processing: Multicore CPU architecture with separated control and data planes delivers 1-2 Gbps aggregate throughput (expandable to over 4 Gbps with performance licence)
• Flexible Network Interfaces: Four 10/100/1000 Mbps Gigabit Ethernet ports supporting both copper (RJ-45) and fibre (SFP) connectivity, plus dedicated management port
• Extensive Expansion Capabilities: Three Network Interface Module slots, two Enhanced Service Module slots, and one Integrated Services Card slot enable customisation for voice, security, and WAN services
• Enterprise Security: Hardware-accelerated IPsec VPN supporting 225 concurrent tunnels, Trust Anchor Module for hardware authentication, zone-based firewall, and secure boot technology
• Modular Power Options: Dual internal power supply support (AC and PoE) with up to 450W standard or 1450W with PoE boost for powering connected devices
• Advanced Traffic Management: Quality of Service (QoS), Class-Based Weighted Fair Queuing, Network-Based Application Recognition (NBAR), and Performance Routing ensure optimal application performance
• Comprehensive Protocol Support: Full IPv4/IPv6 routing with BGP, OSPF, EIGRP, IS-IS, MPLS, and multicast protocols for enterprise-grade connectivity
• Software-Defined Networking Ready: Cisco IOS XE operating system supports both autonomous routing mode and Catalyst SD-WAN controller mode from Release 17.2.1 onwards

Essential Technical Specifications

• Processor: High-performance multicore CPU with Emulated Quantum Flow Processor
• Memory: 4 GB DDR2 ECC DRAM (control plane, upgradeable to 16 GB); 2 GB DDR2 ECC DRAM (data plane)
• Flash Storage: 8 GB default (expandable to 32 GB maximum)
• Network Ports: 4 x 10/100/1000 Mbps Gigabit Ethernet (RJ-45/SFP), 1 x dedicated management port
• Throughput: 1-2 Gbps standard (4+ Gbps with performance licence)
• Dimensions (H x W x D): 88.9 x 438.15 x 469.9 mm (2 rack units)
• Weight: 13.1 kg (with single 450W AC power supply, no modules); 19.4 kg typical fully loaded configuration
• Power Consumption: 158W typical (no modules); 450W maximum with AC supply (without PoE)
• Operating Temperature: 0 to 40°C (at 0-3,000m altitude)
• Expansion Slots: 3 x NIM slots, 2 x SM-X slots, 1 x ISC slot with Online Insertion and Removal support

Cisco IOS XE Operating System

Cisco IOS XE Software provides a modular, Linux-based architecture that separates control and data plane functions for enhanced stability and performance. The operating system's universal image includes all features activated through licensing, simplifying software management and deployment. Benefits include superior scalability through separation of routing functions from packet forwarding, comprehensive security with regular updates and patches, and extensive protocol support for diverse networking requirements. Organisations should note that advanced features require appropriate licences, and the learning curve may be steeper for administrators unfamiliar with Cisco command-line interface compared to simplified management platforms.

Cosmetic Condition Grades

Excellent Grade network equipment shows evidence of very light previous use with minimal wear on housing and external surfaces. Units may have very minor scuffing or minor abrasions associated with light standard use, with no deep scratches, cracks, paint chips, or broken/missing pieces.

Good Grade network equipment is fully tested and fully functional but may feature light scratches on the external body and more visible unit housing wear than Excellent grade units. Good grade routers may feature one or several small dings or dents on covers and/or small paint chips on the surface.

Verified Reboot Refurb Certification

Every Cisco ISR4451-X router undergoes Reboot IT's comprehensive Verified Reboot Refurb certification process, ensuring enterprise-grade reliability. Our certified technicians test all features and functions including network interface connectivity, expansion slot functionality, power supply operation, management interfaces, and routing performance. Each unit is verified to meet Cisco's original specifications before receiving certification.

Since 2001, Reboot IT has been Australia's trusted expert in refurbished enterprise networking equipment, utilising cutting-edge diagnostic testing software to validate every component. All units are verified refurbished through Reboot IT's thorough testing process, which includes power-on diagnostics, interface verification, CMOS validation, port functionality testing, and comprehensive connectivity assessments. Any worn or faulty components are replaced to guarantee reliable, long-lasting performance.

Quality Assurance and Warranty

This certified refurbished Cisco ISR4451-X is backed by Reboot IT's comprehensive 1-year warranty, providing peace of mind for your enterprise networking investment. The warranty covers all hardware components and ensures your router operates to manufacturer specifications. Our commitment to quality means every router is professionally cleaned, thoroughly tested, and verified before dispatch.

Choosing certified refurbished network equipment from Reboot IT delivers exceptional value whilst supporting environmental sustainability by extending the lifecycle of enterprise-grade technology. You receive enterprise performance at a budget-friendly price point, backed by Australian-based support and warranty service.

Upgrade your network infrastructure with confidence. Add this certified refurbished Cisco ISR4451-X to your cart today and experience enterprise-grade performance with Reboot IT's quality guarantee.