Cisco 4000 Series Routers

The Cisco 4000 Series Integrated Services Routers provide routing, hosting, security, switching, and application visibility—all in a single, trustworthy platform. Build your digital branch to be secure, fast, and scalable. Quickly adopt advanced technologies—such as SD-WAN, enhanced application visibility, and edge computing—while meeting the heavy network-performance demands driven by cloud applications and digital transformation.

ISR 4221 Features

GE/SFP integrated WAN ports
1.2-Gbps performance
75-Mbps encrypted throughput
Application visibility

Extend your visibility across the internet, the cloud, and SaaS. You can pinpoint application issues and gain actionable insights with Cisco ThousandEyes integration on selected ISR 4000 Series models.

Network services

Deploy key integrated network services for your branch in minutes, virtually or on-premises, without sacrificing performance.

Simplified management

Configure and monitor your network and enforce business policies through Cisco DNA Center and Cisco SD-WAN. Simplify network automation and turn hours of work into minutes.

Threat protection

Protect your branch site across the LAN and WAN and in the cloud with security integrated into the router. You no longer need a separate security appliance.

The Cisco 4000 Series Integrated Services Routers provide routing, hosting, security, switching, and application visibility—all in a single, trustworthy platform. Build your digital branch to be secure, fast, and scalable. Quickly adopt advanced technologies—such as SD-WAN, enhanced application visibility, and edge computing—while meeting the heavy network-performance demands driven by cloud applications and digital transformation.

ISR 4321 Features

1 RU Desktop form factor
50Mbps performance, upgradable to 100Mbps
1 GE (Integrated out of Band) management port
GE/SFP integrated WAN ports
2 Network Interface Modules (NIM)
1 (PVDM 4) Integrated Services Card (ISC) slot
4 GB Default / 8 GB max Flash
4 GB Default / 8 GB max DRAM
External AC w/ PoE Power Supply
No Redundant Power Supply
Application visibility

Extend your visibility across the internet, the cloud, and SaaS. You can pinpoint application issues and gain actionable insights with Cisco ThousandEyes integration on selected ISR 4000 Series models.

Network services

Deploy key integrated network services for your branch in minutes, virtually or on-premises, without sacrificing performance.

Simplified management

Configure and monitor your network and enforce business policies through Cisco DNA Center and Cisco SD-WAN. Simplify network automation and turn hours of work into minutes.

Threat protection

Protect your branch site across the LAN and WAN and in the cloud with security integrated into the router. You no longer need a separate security appliance.

The Cisco 4000 Series Integrated Services Routers provide routing, hosting, security, switching, and application visibility—all in a single, trustworthy platform. Build your digital branch to be secure, fast, and scalable. Quickly adopt advanced technologies—such as SD-WAN, enhanced application visibility, and edge computing—while meeting the heavy network-performance demands driven by cloud applications and digital transformation.

ISR 4331 Features

1 RU form factor
100Mbps performance, upgradable to 300Mbps
2 GE (Integrated out of Band) management port
GE/SFP integrated WAN ports
2 Network Interface Modules (NIM)
1 (PVDM 4) Integrated Services Card (ISC) slot
4 GB Default / 16 GB max Flash
4 GB Default / 16 GB max DRAM
External AC w/ PoE Power Supply
No Redundant Power Supply
Application visibility

Extend your visibility across the internet, the cloud, and SaaS. You can pinpoint application issues and gain actionable insights with Cisco ThousandEyes integration on selected ISR 4000 Series models.

Network services

Deploy key integrated network services for your branch in minutes, virtually or on-premises, without sacrificing performance.

Simplified management

Configure and monitor your network and enforce business policies through Cisco DNA Center and Cisco SD-WAN. Simplify network automation and turn hours of work into minutes.

Threat protection

Protect your branch site across the LAN and WAN and in the cloud with security integrated into the router. You no longer need a separate security appliance.

The Cisco 4000 Series Integrated Services Routers provide routing, hosting, security, switching, and application visibility—all in a single, trustworthy platform. Build your digital branch to be secure, fast, and scalable. Quickly adopt advanced technologies—such as SD-WAN, enhanced application visibility, and edge computing—while meeting the heavy network-performance demands driven by cloud applications and digital transformation.

ISR 4351 Features

2 RU form factor
200Mbps performance, upgradable to 400Mbps
3 GE (Integrated out of Band) management port
2 PoE GE/SFP integrated WAN ports
3 Network Interface Modules (NIM)
1 (PVDM 4) Integrated Services Card (ISC) slot
4 GB Default / 16 GB max Flash
4 GB Default / 16 GB max DRAM
External AC w/ PoE Power Supply
No Redundant Power Supply
Application visibility

Extend your visibility across the internet, the cloud, and SaaS. You can pinpoint application issues and gain actionable insights with Cisco ThousandEyes integration on selected ISR 4000 Series models.

Network services

Deploy key integrated network services for your branch in minutes, virtually or on-premises, without sacrificing performance.

Simplified management

Configure and monitor your network and enforce business policies through Cisco DNA Center and Cisco SD-WAN. Simplify network automation and turn hours of work into minutes.

Threat protection

Protect your branch site across the LAN and WAN and in the cloud with security integrated into the router. You no longer need a separate security appliance.

The Cisco 4000 Series Integrated Services Routers provide routing, hosting, security, switching, and application visibility—all in a single, trustworthy platform. Build your digital branch to be secure, fast, and scalable. Quickly adopt advanced technologies—such as SD-WAN, enhanced application visibility, and edge computing—while meeting the heavy network-performance demands driven by cloud applications and digital transformation.

ISR 4431 Features

1 RU form factor
500Mbps performance, upgradable to 1Gbps
4 GE (Integrated out of Band) management port
2 PoE GE/SFP integrated WAN ports
3 Network Interface Modules (NIM)
1 (PVDM 4) Integrated Services Card (ISC) slot
8 GB Default / 32 GB max Flash
8 GB Default / 32 GB max DRAM
External AC w/ PoE Power Supply
Redundant Power Supply
Application visibility

Extend your visibility across the internet, the cloud, and SaaS. You can pinpoint application issues and gain actionable insights with Cisco ThousandEyes integration on selected ISR 4000 Series models.

Network services

Deploy key integrated network services for your branch in minutes, virtually or on-premises, without sacrificing performance.

Simplified management

Configure and monitor your network and enforce business policies through Cisco DNA Center and Cisco SD-WAN. Simplify network automation and turn hours of work into minutes.

Threat protection

Protect your branch site across the LAN and WAN and in the cloud with security integrated into the router. You no longer need a separate security appliance.

The Cisco 4000 Series Integrated Services Routers provide routing, hosting, security, switching, and application visibility—all in a single, trustworthy platform. Build your digital branch to be secure, fast, and scalable. Quickly adopt advanced technologies—such as SD-WAN, enhanced application visibility, and edge computing—while meeting the heavy network-performance demands driven by cloud applications and digital transformation.

ISR 4661 Features

10 GE SFP+, PoE GE/SFP, GE/SFP integrated WAN ports
10-Gbps+ performance
7-Gbps encrypted throughput
Application visibility

Extend your visibility across the internet, the cloud, and SaaS. You can pinpoint application issues and gain actionable insights with Cisco ThousandEyes integration on selected ISR 4000 Series models.

Network services

Deploy key integrated network services for your branch in minutes, virtually or on-premises, without sacrificing performance.

Simplified management

Configure and monitor your network and enforce business policies through Cisco DNA Center and Cisco SD-WAN. Simplify network automation and turn hours of work into minutes.

Threat protection

Protect your branch site across the LAN and WAN and in the cloud with security integrated into the router. You no longer need a separate security appliance.