Cisco ISR4331/K9 Router ISR4331 - NO CPU CLOCK ISSUE

Description:

The Cisco ISR4331/K9 Integrated Services Router is a high-performance enterprise branch router designed to provide secure WAN connectivity, advanced routing capabilities, and integrated network services within Cisco enterprise infrastructures. It operates on the Cisco ISR 4000 Series platform and supports modular expansion for voice, security, and application services to meet the demands of modern distributed business networks. The router delivers reliable routing performance with support for secure VPN connectivity, traffic management, and centralized network control across branch and remote office deployments. Commonly installed in corporate branch offices, retail networks, financial institutions, and enterprise WAN environments where secure and scalable routing infrastructure is required. Maintenance teams, network administrators, and system integrators deploy this router for network upgrades, branch office connectivity, infrastructure expansion, or replacement of legacy enterprise routers.

Applications:

The Cisco ISR4331/K9 router is used in enterprise branch networking environments to provide secure routing, WAN connectivity, and integrated network services for distributed business infrastructures. It is commonly deployed in corporate offices, government facilities, retail locations, and remote enterprise sites where organizations require reliable internet connectivity and secure communication between branch offices and central data centers. Network engineers install this router to support VPN connectivity, cloud access, voice and data services, and centralized network management across enterprise WAN architectures.

Technical Specifications:

• Manufacturer Part Number (MPN): ISR4331/K9
• Brand: Cisco
• Product Type: Integrated Services Router
• Series: Cisco ISR 4000 Series
• WAN/LAN Ports: 3 × 10/100/1000 Gigabit Ethernet ports
• Base Throughput: Up to 100 Mbps (upgradable with performance licenses)
• Expansion Slots: Network Interface Module (NIM) slots and service module support
• USB Ports: 2 × USB ports for storage and management
• Console Ports: RJ-45 and mini-USB console interfaces
• Operating System: Cisco IOS XE
• Security Features: Integrated firewall, VPN support, and advanced security services
• Routing Protocol Support: BGP, OSPF, EIGRP, RIP, IPv4 and IPv6
• Mounting Type: Rack-mountable (1U form factor)

Common Replacements:

• Cisco ISR4321/K9 Integrated Services Router
• Cisco ISR4351/K9 Integrated Services Router
• Cisco C1111-8P Integrated Services Router