Cisco ISR4431/K9 Integrated Service Router ISR4431/K9

Description:

The Cisco ISR4431/K9 Integrated Services Router is a modular enterprise router used in branch and WAN network systems to provide secure data routing and advanced network services. Commonly installed in corporate branch offices, enterprise WAN environments, and service edge deployments where reliable connectivity and performance are required. Maintenance teams and system integrators use this router for network expansion, upgrades, and replacement of legacy routing platforms to improve scalability and security.

Applications:

The Cisco ISR4431/K9 router is widely used in enterprise and industrial networking environments to deliver secure and scalable WAN connectivity. It is deployed in branch offices, remote sites, and distributed enterprise networks to support applications such as VPN connectivity, cloud access, VoIP communications, and data routing. With integrated services and modular expansion capabilities, this router is ideal for organizations requiring flexible and high-performance network infrastructure.

Technical Specifications:

• Manufacturer: Cisco
• Model / Part Number: ISR4431/K9
• Product Type: Integrated Services Router
• Throughput: Up to 500 Mbps (upgradable with licenses)
• Interfaces: 3x Gigabit Ethernet RJ-45 ports
• NIM Slots: 2x Network Interface Module slots
• SM Slots: 1x Service Module slot
• Memory: 4 GB DRAM (expandable)
• Storage: 4 GB flash (expandable)
• Routing Features: BGP, OSPF, MPLS, VPN support
• Security Features: Integrated firewall, IPSec VPN, encryption
• Management: Cisco IOS XE, CLI, SNMP
• Power Supply: Internal AC
• Mounting: Rack-mountable (1U)

Common Replacements:

• Cisco ISR4451-X/K9
• Cisco ISR4321/K9
• Cisco ISR4351/K9