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- Enterprise Cisco ISR 4321 Integrated Services Router with AX Bundle for Secure Branch Networking and Application Optimization
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Cisco ISR4321-AX/K9 ISR 4321 Router with AX Bundle (Application Experience Security License)
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.
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