Cisco ISR4451-X/K9-RF Refurbished 4-Port Gigabit Router

• Enterprise branch WAN routing
• MPLS and Internet connectivity
• SD-WAN branch infrastructure
• Hybrid cloud connectivity
• VPN-based remote-site networking
• Branch security and firewall deployment
• Application-aware WAN networking
• Voice and unified communications infrastructure
• Network modernization using refurbished hardware
• Replacement of compatible ISR 4000 deployments

• 4 onboard Gigabit Ethernet interfaces
• 3 Network Interface Module slots
• 2 Enhanced Service Module slots
• 1 Integrated Services Card slot
• Cisco IOS XE software platform
• Application-aware branch networking
• WAN and LAN routing capabilities
• Modular connectivity expansion
• Security and VPN capabilities
• Network monitoring and management support
• Supports Cisco SD-WAN software features
• Online insertion and removal for supported modules
• Optional redundant power configuration
• Suitable for enterprise branch infrastructure

• Brand: Cisco
• Product Family: Cisco 4000 Series Integrated Services Routers
• Model: ISR4451-X
• Part Number: ISR4451-X/K9-RF
• Product Type: Integrated Services Router
• Condition: Refurbished / Remanufactured
• Onboard Ethernet Ports: 4 x Gigabit Ethernet
• NIM Slots: 3
• Service Module Slots: 2
• Integrated Services Card Slots: 1
• Flash Memory: 8 GB
• DRAM: 4 GB default
• Default Aggregate Throughput: 1 Gbps
• Performance License Throughput: 2 Gbps
• Form Factor: 2 RU
• Management Port: 1 x Gigabit Ethernet
• USB Ports: 2 x USB Type-A
• Power Supply: Internal AC, PoE or DC options
• Redundant Power Supply: Supported
• OIR: Supported
• Operating System: Cisco IOS XE 

• WHY CHOOSE THIS PRODUCT?

• The ISR4451-X/K9-RF is a practical procurement option when an organization needs the capabilities of the 4451-X platform while controlling hardware acquisition costs through refurbished equipment. Its 4 Gigabit interfaces, 3 NIM slots and 2 service-module slots provide more expansion flexibility than lower-end ISR 4000 models, supporting WAN, security, voice and application requirements from one platform. Cisco identifies the 4451-X as end-of-sale, with end-of-support scheduled for November 30, 2028, making compatibility, module availability and support requirements important before purchase. For replacement projects, buyers should match the refurbished unit against the existing chassis configuration, installed modules, software requirements and power arrangement.