Cisco ISR4331/K9 4331 Integrated Services Router

Specifications for Cisco ISR4331/K9 4331 Integrated Services Router

• Model: Cisco ISR4331/K9

• WAN Ports: 3 Integrated GE

• Modularity: 2 NIM slots, 1 SM slot

• Performance: Up to 100 Mbps (base), scalable

• Security: Embedded encryption, VPN

• Use Case: Medium/large branch, enterprise edge

Cisco ISR4331 4331 Integrated Services Router delivers powerful branch performance

The Cisco ISR4331 4331 Integrated Services Router is a powerful next-generation platform designed for high-performance branch office deployments. It offers the right balance between scalability, security, and modularity for organizations seeking future-proof networking solutions. As part of the Cisco ISR 4000 Series, the Cisco ISR4331 4331 Integrated Services Router is ideal for midsize to large branches where high throughput and secure connectivity are non-negotiable.

With a flexible design and embedded services architecture, the Cisco ISR4331 4331 Integrated Services Router delivers consistent performance and centralizes both WAN connectivity and branch-level services into a single compact appliance.

Cisco ISR4331 4331 Integrated Services Router features modular design for flexibility

Built to adapt to varying network demands, the Cisco ISR4331 4331 Integrated Services Router comes with 2 Network Interface Module (NIM) slots and 1 Service Module (SM) slot. This design enables customization through add-on modules such as WAN interface cards, voice DSPs, and storage modules. The integrated services framework also allows the router to evolve alongside your business needs.

Whether expanding to support more users or deploying unified communications, the Cisco ISR4331 4331 Integrated Services Router offers the flexibility to scale services without replacing the hardware.

Cisco ISR4331 4331 Integrated Services Router delivers intelligent network performance

Powered by Cisco’s multicore architecture, the Cisco ISR4331 4331 Integrated Services Router separates control and data planes, ensuring intelligent service orchestration. This enables true application-aware traffic handling with real-time visibility and policy-based performance routing.

The Cisco ISR4331 4331 Integrated Services Router offers a base performance of 100 Mbps, upgradeable via software licenses to higher throughput—ideal for adapting to increasing WAN demand without hardware changes.

Cisco ISR4331 4331 Integrated Services Router supports robust security features

The Cisco ISR4331 4331 Integrated Services Router includes embedded hardware-based encryption and security capabilities. With support for IPsec VPN, firewall policies, and Cisco Umbrella integration, it ensures secure data transmission across distributed networks.

For enterprises prioritizing network protection, the Cisco ISR4331 4331 Integrated Services Router delivers branch-level defense against external threats while maintaining high-speed WAN connections and centralized policy enforcement.

Cisco ISR4331 4331 Integrated Services Router simplifies branch IT operations

Cisco’s Digital Network Architecture (DNA) support empowers the Cisco ISR4331 4331 Integrated Services Router with automation, analytics, and centralized management tools. From Zero Touch Provisioning (ZTP) to Cisco DNA Center integration, it minimizes the operational load on IT teams.

Administrators can configure, monitor, and troubleshoot the Cisco ISR4331 4331 Integrated Services Router remotely, significantly improving response times and network uptime. Support for SNMP, CLI, and web interfaces ensures flexible administration.

Cisco ISR4331 4331 Integrated Services Router pairs seamlessly with Cisco 921 for edge-to-core alignment

In multi-tiered networks, deploying the Cisco ISR4331 4331 Integrated Services Router as a core or aggregation-layer device enhances performance and governance. When paired with branch-level routers like the Cisco 921 Gigabit Ethernet Security Router it forms a coherent, scalable network strategy.

This alignment enables centralized policy enforcement, consistent security posture, and streamlined management across all branches and field offices.