Cisco ISR4221/K9 Integrated Services Router

The Cisco ISR4221/K9 Integrated Services Router is a compact, modular networking solution designed for small enterprise branch deployments. It brings together routing, security, unified communications, and network services on a single digital-ready platform. With built-in flexibility and scalability, this router enables you to consolidate your IT infrastructure while optimizing total cost of ownership. Offering a default throughput of 35 Mbps, it supports pay-as-you-grow performance upgrades up to 75 Mbps, ensuring investment protection as business requirements evolve.

Product Features

Modular, Future-Proof Design

The ISR4221/K9 includes two Network Interface Module (NIM) slots, enabling flexible expansion options such as voice, WAN, or additional network connectivity. The modular architecture simplifies upgrades and allows you to adapt the router to your specific deployment needs.

Pay-As-You-Grow Performance

With an initial system throughput of 35 Mbps, the ISR4221/K9 can be software-upgraded to deliver up to 75 Mbps using performance licenses. This makes it a cost-efficient solution for growing businesses.

Integrated Network and Security Services

Consolidate multiple IT functions into a single platform. The ISR4221 supports integrated network security, VPN, and traffic management tools, reducing complexity and improving security posture.

Simple and Space-Efficient

Occupying just 1 rack unit (1RU), the router is ideal for space-constrained branch environments. Its quiet, fanless design and external power supply make it suitable for office installations.

Built for Unified Communications

While the platform does not include an onboard Integrated Services Card (ISC) slot, it supports voice and data convergence through optional modules, enabling branch-wide collaboration and telephony capabilities.

Front and Rear Panel Visibility

Equipped with system LEDs and clearly labeled ports, the router provides visual indicators for power, management, and Ethernet status. Rear panel includes SFP and RJ-45 Gigabit Ethernet ports, USB, and console connectivity for versatile deployment.

Product Specifications

• Product Code: Cisco ISR4221/K9
• Aggregate Throughput: 35 Mbps (default), upgradable to 75 Mbps
• Total Onboard 10/100/1000 Ports: 2
• RJ-45-Based Ports: 2
• SFP-Based Ports: 1
• NIM (Network Interface Module) Slots: 2
• Integrated Services Card (ISC) Slots: None
• Default Memory (DDR3 ECC DRAM): 4 GB
• Flash Memory: 8 GB
• Power Supply Options: External AC only
• Rack Height: 1 RU
• Dimensions (H x W x D): 1.72 x 12.7 x 10 in (43.7 x 322.6 x 254 mm)
• Weight (with AC Power Supply, no modules): 7.1 lb (3.22 kg)