Cisco ISR 4321 ISR4321/K9 Data Sheet

 

 

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Data Sheet 

Cisco 4000 Family Integrated Services Router 

Cisco

®

 4000 Family Integrated Services Routers (ISRs) form an intelligent WAN 

platform that delivers the performance, security, and convergence capabilities that 
today’s branch offices need. 

Product Overview 

The Cisco 4000 Family Integrated Services Router (ISR) revolutionizes WAN communications in the enterprise 

branch. With new levels of built-in intelligent network capabilities and convergence, it specifically addresses the 

growing need for application-aware networking in distributed enterprise sites. These locations tend to have lean IT 

resources. But they often also have a growing need for direct communication with both private data centers and 

public clouds across diverse links, including Multiprotocol Label Switching (MPLS) VPNs and the Internet. 

The Cisco 4000 Family contains five platforms: the 4451-X, 4431, 4351, 4331, and 4321 ISRs. 

Figure 1.    Cisco 4000 Series Integrated Services Routers 

 

Features and Benefits 

Cisco 4000 Family ISRs provide you with Cisco

®

 Intelligent WAN (IWAN) software features and a converged 

branch infrastructure. Along with superior throughput, these capabilities form the building blocks of next-generation 

branch-office WAN solutions. 

Cisco IWAN is a set of intelligent software services that allow you to reliably and securely connect users, devices, 

and branch office locations across a diverse set of WAN transport links. IWAN-enabled routers like the ISR 4000 
dynamically route traffic across the “best” link based on up-to-the-minute application and network conditions for 

great application experiences. You get tight control over application performance, bandwidth usage, data privacy, 

and availability of your WAN links - control that you need as your branches conduct greater volumes of mission-

critical business. 

The Cisco 4000 Series ISRs consolidate many must-have IT functions, including network, compute, and storage 

resources. The high-performance, integrated routers run multiple concurrent IWAN services, including encryption, 

traffic management, and WAN optimization, without slowing your data throughput. And you can activate new 

services on demand through a simple licensing change.