Please allow ~2-3 weeks to dispatch for quality control. Product images are for illustrative purposes only and may contain AI-generated content; they may not represent the final product you receive. Products are subject to the cosmetic grading policy detailed here.
If you are ordering a device that does not include a Windows 11 licence as standard, please check Microsoft's minimum system requirements to confirm if it can be upgraded later should you wish to do so.
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.
| Manufacturer Warranty | 3 Months |
| Number Of Lan Ports | none |
| Maximum Lan Data Rate | None |
| Item Height | None |
| Custom Bundle | No |
| Network Connectivity | None |
| Item Width | None |
| Condition | A |
| Model | 4300 SERIES |
| Maximum Wireless Data Rate | None |
| Type | Other |
| Network Type | None |
| Network Management Type | None |
| Processor Model | none |
| Supported Wireless Protocols | None |
| Number Of Wan Ports | None |
| Device Connectivity | None |
| Interface | None |
| Connector Type | None |
| Raid Levels | None |
| Item Length | None |
| Brand | Cisco |
| Form Factor | None |
| Product Line | none |
| Bundle Description | None |
Refurbished Computers - Cosmetic Grading Guide
Our supplier's refurbished hardware is typically graded either "Excellent" or "Good", however, some legacy products were graded under a letter grading system (A, B, C). Please find the definitions for each grade below and contact us if you're uncertain of a device's grade.
Used Smartphone / Refurbished Mobile Phones
"Excellent" Grade
Devices in this category appear like new, with very minor wear. Expect light or fine scratches on the screen that are shallow enough not to catch on a fingernail. The edge around the glass is virtually flawless, save for possible light scratching around the power port. The back plate may show light/fine scratches, including on the Apple logo, with any discoloration being minimal.
"Good" Grade
These devices are characterized by being fully tested and functional even if they have body scratches, minor paint chips, or a small hairline crack on the screen. Screens are free from dead pixels but may exhibit slight scratching from moderate use.
Refurbished Desktops, Laptops and Monitors
"Excellent" Grade - Laptops
Reserved for units that show barely any signs of previous use, these laptops may exhibit very minor scuffing or abrasions, associated only with minimal standard use. The keyboards show light wear, and importantly, the screens are pristine, free from any scratches, cracks, chips, dead pixels, dark spots, discoloration, or blemishes.
"Excellent" Grade - Desktops
Desktop PCs in the "Excellent" grade category are free from deep scratches, cracks, paint chips, or any broken/missing pieces, ensuring a sleek and almost-new aesthetic.
"Excellent" Grade - Monitors
"Excellent" grade is reserved for units that show evidence of very little to no previous use. Any wear on an "Excellent" Display, including housing/frame and/or external surfaces (i.e. Frame) is associated with standard minimal use. "Excellent" units may have minor scuffing and / or minor abrasions on plastics with from standard light previous use."Excellent" Displays will feature no scratches, cracks, chips, dead pixels, dark spots, discoloration or blemishes. Units will only feature the standard minimal wear and tear that is associated with a used unit.
"Good" Grade - Laptops
"Good" laptops may feature one or several small dings or dents on covers and / or small paint chips on the surface or small hairline cracks in the bezel. Laptop screens may feature uneven light diffusion in screen and may feature subtle blemishes. "Good" Laptops will not feature cracks screens but may feature slight scratching, dead pixels or white spots on the screen.
"Good" Grade - Desktops
"Good" grade desktops may have light scratches on external body and may feature more excessive unit housing and/or external case wear than "Excellent" units, including wear on case / lid. "Good" PCs may feature one or several small dings or dents on covers and / or small paint chips on the surface.
"Good" Grade - Monitors
Displays in the "Good" grade have been fully tested and are functional but may include scratches on body, small paint chips, minor cracks on body, loose and/or wobbly bases. "Good" Display screens may feature uneven light diffusion in screen and may feature subtle to moderate blemishes. "Good" Displays will not feature cracks on screens but may feature slight scratching on screen surfaces from moderate use or wear, dead pixels or white spots on the screen.
Legacy letter grading
Used Smartphone / Refurbished Mobile Phones
A Grade
- No chips, scratches or cracks on the front glass and housing
- No missing or alternative parts
- No sign of liquid damage
- Battery cannot be swollen
B Grade – Same as A Grade except:
- May have light scuffs but no chips or cracks
- Light scratches on housing or front glass
C-Grade – Same as B Grade except:
- Unlimited long shallow scratches on the front glass
- No chips or cracks on the front glass
- Unlimited scratches, chips/dents on back cover housing and corners
- Minor cracks allowed
- Customized housing and aftermarket covers allowed
Refurbished Desktops, Laptops and Monitors
A-Grade
- Overall excellent to very good cosmetic condition. Some may be pristine, others may have light scratches or minor blemishes
- Laptops may have some shiny areas around the keyboard such as the space bar, touchpad or touchpad buttons
- Keyboard keys will be in excellent condition
- Laptop and monitor screens will be blemish free
- Cosmetic blemishes will not impact the overall functionality or performance of the device
B-Grade
- Will have some cosmetic blemishes that include scratches and/or other imperfections
- Minor scratches and dents on the housing
- Laptops may have shiny keys or shiny surfaces around the keyboard however all characters will be legible
- Laptop and monitors screens will have imperfections such as minor scratches, minor chips and/or white spots. There will be no cracking on the screen
- Have the same warranty as A Grade
- Pricing will be cheaper than A Grade
C-Grade
- Same as B-Grade except may have unlimited scratches/blemishes on the screen
- May have cracks/chips or dents on the housing
- Have the same warranty as A Grade
- Pricing will be cheaper than B Grade
