ISR4321-AX/K9 Cisco ISR4321 Router with AX Bundle (App Security License)

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Cisco ISR4321-AX/K9 ISR 4321 Router with AX Bundle (Application Experience Security License)

Enterprise Cisco ISR 4321 Integrated Services Router with AX Bundle for Secure Branch Networking and Application Optimization

The Cisco ISR4321-AX/K9 Integrated Services Router is an enterprise-grade branch networking solution from the Cisco ISR 4000 Series, designed to deliver secure WAN connectivity, application-aware networking, VPN services, and flexible modular expansion. Featuring the AX Bundle with Application Experience (AppX) and Security capabilities, this router helps organizations improve application performance while protecting business-critical network traffic.

The ISR4321-AX/K9 features 2 integrated Gigabit Ethernet interfaces for flexible WAN and LAN connectivity and delivers 50 Mbps of default aggregate throughput, with the ability to scale up to 100 Mbps through appropriate performance licensing. Its compact 1U rack-mountable design makes it ideal for branch offices, remote locations, and distributed enterprise environments.

Powered by Cisco IOS XE, the router supports advanced enterprise networking capabilities including BGP, OSPF, EIGRP, IPv4, IPv6, NAT, QoS, application-aware routing, and intelligent traffic management. These features help organizations optimize application delivery, prioritize critical traffic, and maintain reliable connectivity across distributed networks.

For secure branch communications, the Cisco ISR4321-AX/K9 supports IPsec VPN, encryption, firewall capabilities, access control, and secure site-to-site connectivity. The integrated security functionality helps protect data and network resources while enabling secure communications between headquarters, branch offices, and remote locations.

The router's modular architecture includes 2 Network Interface Module (NIM) slots and 1 Integrated Services Card (ISC) slot, providing flexibility for future network expansion and evolving connectivity requirements. It can also support migration to Cisco SD-WAN with compatible software and licensing, helping organizations modernize their WAN infrastructure.

Ideal for enterprise branch networking, secure WAN connectivity, VPN gateway deployments, application optimization, remote office connectivity, and SD-WAN migration, the Cisco ISR4321-AX/K9 Integrated Services Router with AX Bundle delivers scalable performance, advanced security, and intelligent application services for modern enterprise networks.

Product Specifications – Cisco ISR4321-AX/K9 4000 Series Integrated Services Router with AX Bundle
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Specification	Details
Product Name	Cisco ISR4321-AX/K9 4000 Series Integrated Services Router with AX Bundle
Manufacturer	Cisco Systems
Part Number	ISR4321-AX/K9
Product Series	Cisco ISR 4000 Series
Product Type	Integrated Services Router (ISR)
Bundle / License	AX Bundle
AX Bundle Features	Application Experience (AppX) and Security capabilities
Aggregate Throughput	50 Mbps default, upgradeable to 100 Mbps with performance licensing
WAN/LAN Interfaces	2 × Integrated Gigabit Ethernet Ports
Interface Type	Gigabit Ethernet
Network Interface Module Slots	2 × NIM Slots
Enhanced Service Module Slots	Not Supported
Integrated Services Card Slot	1 × ISC Slot
USB Ports	USB connectivity supported
Console Management	RJ-45 and USB Console Support
Operating System	Cisco IOS XE
Architecture	Multicore Cisco ISR 4000 Series Architecture
Application Experience Services	Application Visibility, Optimization and Intelligent Traffic Management
Application-Aware Routing	Supported
VPN Support	IPsec VPN and Secure Site-to-Site Connectivity
Security Features	Firewall, VPN, Encryption, Access Control and Threat Protection Features
Encryption Support	AES and IPsec Encryption
Routing Protocols	BGP, OSPF, EIGRP, RIP and Static Routing
IPv4 Support	Yes
IPv6 Support	Yes
MPLS Support	Supported, license and software dependent
Quality of Service (QoS)	Advanced QoS and Traffic Prioritization
NAT Support	Yes
VLAN Support	Yes
High Availability	Platform and deployment dependent
SD-WAN Migration	Supports migration to Cisco SD-WAN with appropriate software and licensing
Programmability	Cisco IOS XE APIs and Automation Capabilities
Management	CLI, SNMP and Cisco Network Management Platforms
Memory	4 GB DRAM Standard, expandable
Flash Memory	4 GB Standard, expandable
Modular Expansion	Supported through NIM and ISC slots
Power Supply	Internal AC Power Supply
Form Factor	1U Rack-Mountable
Deployment Type	Enterprise Branch, WAN Edge and Remote Office
Application	Secure WAN Connectivity, VPN, Application Optimization
Region Variant	Global
Reliability	Enterprise-Grade
Condition	Refurbished
Use Cases	Enterprise Branch Networking, Secure WAN, VPN Gateway, SD-WAN Migration, Application Optimization, Remote Office Connectivity

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FAQs

Q1. What does the AX Bundle include?
The AX Bundle combines Application Experience (AppX) and Security licensing to provide advanced routing, application optimization, and security capabilities.

Q2. How many onboard network interfaces does the ISR4321-AX/K9 provide?
It includes two Gigabit Ethernet WAN/LAN interfaces for flexible branch connectivity.

Q3. Does this router support VPN services?
Yes. It supports secure IPsec VPN and other enterprise security features through Cisco IOS XE and the AX Bundle.

Q4. Can the router be expanded with additional modules?
Yes. The modular design supports Network Interface Modules (NIMs) for additional connectivity and services.

Q5. Is the ISR4321-AX/K9 suitable for enterprise branch offices?
Yes. It is designed for branch deployments requiring secure WAN access, application optimization, and scalable networking capabilities.