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Cisco ISR4321-AXV/K9 Integrated Services Router

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ISR4321-AXV/K9 Overview

Cisco 4321 Integrated Services router is design to deliver advanced services to the small enterprise branch environment. It delivers 50Mbps thoughtput by default.?With pay-as-you-grow performance, you can increase forwarding capacity to 100Mbps by buying FL-4320-PERF-K9 licenses. The Cisco

ISR4321-AXV/K9 is the 4321 Application Experience with Voice (AXV) Bundle.

Quick Spec

Product Number

ISR4321-AXV/K9
Product Description Cisco ISR 4321 AXV Bundle, with CUBE-10, IPBase, APP, SEC and UC licenses.

Aggregate Throughput

50 Mbps to 100 Mbps

Total onboard WAN or LAN 10/100/1000 ports

2

RJ-45-based ports

2

SFP-based ports

1

NIM slots

2

OIR (all I/O modules)

Yes

Onboard ISC slot

1

Default flash memory

4 GB

Maximum flash memory

8 GB
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Product Number ISR4321-AXV/K9
Product Description Cisco ISR 4321 AXV Bundle, with CUBE-10, IPBase, APP, SEC and UC licenses.

Aggregate Throughput

50 Mbps to 100 Mbps

Total onboard WAN or LAN 10/100/1000 ports

2

RJ-45-based ports

2

SFP-based ports

1

Enhanced service-module slots

0

Doublewide service-module slots

0

NIM slots

2

OIR (all I/O modules)

Yes

Onboard ISC slot

1

Default memory double-data-rate 3 (DDR3) error-correction-code (ECC) DRAM

(Combined control/services/data planes)

4 GB

Maximum memory DDR3 ECC DRAM (Combined control/services/data planes)

8 GB

Default memory DDR3 ECC DRAM (data plane)

NA

Maximum memory DDR3 ECC DRAM (data plane)

NA

Default memory DDR3 ECC DRAM (control/services plane)

NA

Maximum memory DDR3 ECC DRAM (control/services plane)

NA

Default flash memory

4 GB

Maximum flash memory

8 GB

External USB 2.0 slots (type A)

1

USB console port -type B mini (up to 115.2 kbps)

1

Serial console port - RJ45 (up to 115.2 kbps)

1

Serial auxiliary port - RJ45

(up to 115.2 kbps)

1

Power-supply options

External: AC and PoE

Redundant power supply

N/A

AC input voltage

100 to 240 VAC autoranging

AC input frequency

47 to 63 Hz

AC input current range, AC power supply (maximum)

1.5 to 0.6A

AC input surge current

90 A peak and less than 3 Arms per half cycle

Typical power (no modules) (watts)

36

Maximum power with AC power supply (watts)

125

Maximum power with PoE power supply (platform only) (watts)

260

Maximum endpoint PoE power available from PoE power supply (watts)

120

Frequently Asked Questions

What is Cisco ISR4321-AXV/K9?

The ISR4321-AXV/K9 is a Cisco 4000 Series Integrated Services Router bundle designed for small enterprise branch offices. It includes Application Experience with Voice (AXV) licensing, combining secure routing, application awareness, unified communications, and voice capabilities in one platform.

What does “AXV” mean in ISR4321-AXV/K9?

“AXV” stands for Application Experience with Voice. This bundle includes licenses such as: APP (Application services) SEC (Security) UC (Unified Communications) CUBE-10 (voice licensing) It is designed for branches needing both voice and application optimization.

What throughput does ISR4321-AXV/K9 support?

The ISR4321-AXV/K9 delivers 50 Mbps default throughput, which can be upgraded up to 100 Mbps using performance licenses. This makes it suitable for small branch offices handling secure business traffic and voice services.

What ports and expansion options are available?

Key hardware specs include: 2 × Gigabit WAN/LAN ports 2 × RJ-45 ports 1 × SFP port 2 × NIM slots for expansion Modular architecture for future upgrades This flexibility allows businesses to adapt WAN connectivity as they grow.

Is ISR4321-AXV/K9 good for branch office deployment?

Yes. Cisco designed the ISR4321 series specifically for small enterprise branch environments, providing: Secure WAN connectivity Voice integration Application-aware routing Centralized management compatibility It is widely used where compact yet capable branch routers are required.

Does ISR4321-AXV/K9 support unified communications (VoIP)?

Yes. The AXV bundle includes CUBE-10 and UC licenses, enabling: Secure VoIP deployment SIP trunking support Branch telephony Voice gateway functions This makes it popular in organizations running voice + data services from one device.

Is ISR4321-AXV/K9 secure for enterprise use?

Yes. Security features include: Secure VPN support Encrypted traffic capabilities Integrated security licensing (SEC) Application-aware visibility These features help protect branch-to-HQ communication and cloud connectivity.

Is ISR4321-AXV/K9 still supported?

The model is officially End-of-Life (EOL), but Cisco support and services continue until 30 November 2028, making it still widely deployed in existing networks.

What is the replacement for ISR4321-AXV/K9?

The recommended migration path is the Cisco Catalyst C8200 Series, which offers: Modern SD-WAN architecture Better cloud integration Longer lifecycle support Higher performance scalability This is a common upgrade path for enterprise network refresh projects.

What is the difference between ISR4321-AXV/K9 and ISR4321/K9?

Main difference: ISR4321/K9 → Base routing platform ISR4321-AXV/K9 → Includes application experience + voice licensing (AXV bundle) Businesses choose AXV when they need advanced application visibility and voice services in one device.

Is ISR4321-AXV/K9 suitable for SD-WAN environments?

Yes. ISR 4000 routers are commonly used in SD-WAN deployments, and administrators often migrate them into centralized SD-WAN management for branch simplification and policy automation.

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