United States$5,000,000+
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Michael Thornton
4
Solid UC performance for branch offices. Voice quality is clear and the router has been stable since deployment.
ISR4321-V/K9
Cisco ISR 4321 Bundle, w/UC License
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ISR4321-V/K9
- Description:
- Cisco ISR 4321 Bundle, w/UC License
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- Brand:
- Cisco
- GTIN:
- 818249735450
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- Warranty:
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- List Price:
$4,676.00
- Price:
$1,966.0058% off
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ISR4321-V/K9 Overview
ISR4321-V/K9 is a fixed enterprise router engineered for high-performance branch connectivity, featuring a robust architecture with integrated services such as voice and video, versatile power options through an AC power supply with redundancy, and clearly defined WAN/LAN interfaces including two WAN ports and four LAN ports. Its design emphasizes modular capabilities with two expansion slots that support additional EHWIC modules, ensuring scalability and adaptability for varied network demands.
ISR4321-V/K9 delivers advanced VPN support including IPSec, SSL VPN, DMVPN, and FlexVPN, while achieving a throughput capacity of up to 300 Mbps to meet demanding enterprise applications. Coupled with built-in security features like firewall and intrusion prevention, high availability, and efficient remote management via SSH, Telnet, and SNMP, this router is optimized for enterprise use cases where reliability, performance, and integrated services are critical.
ISR4321-V/K9 price is $1,966.00, a 58% saving from the Cisco list price of $4,676.00. ISR4321-V/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for ISR4321-V/K9 for additional pricing. Browse the full Router Isr 4000 series or explore all Cisco products.
ISR4321-V/K9 Specifications
- Product Type
- Enterprise Router
- VPN Support
- IPSec / SSL VPN / DMVPN / FlexVPN
- Power Source
- AC Power Supply / Redundant
- Routing Protocols
- OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing
- Broadband
- N/A
- Architecture
- Fixed
- WAN Configuration
- Dual WAN
- WAN Ports
- 2 WAN
- LAN Ports
- 4 LAN Ports
- Ethernet Technology
- 10/100/1000
- Wi-Fi Standard
- N/A
- Connectivity Type
- Wired / Ethernet
- Network Protocols
- IPv4, IPv6
- Remote Management
- SSH, Telnet, SNMP
- Compliance Standards
- FCC, CE
- Wireless Support
- No
- Speed/Capacity
- Gigabit
- Firewall Features
- Yes
- Features
- VPN / VoIP / IPv6 Compatible / Firewall / MPLS
- Use Case
- Enterprise
- Management
- Managed
- Form Factor
- Rack-mount
- Integrated Services
- Voice / Video
- High Availability Support
- Supported
- Safety
- N/A
- EMC
- N/A
- Telecom
- N/A
- Throughput Capacity
- 300 Mbps
- QoS Features
- Supported
- Built-in Security Features
- Firewall / Intrusion Prevention
- Expansion Slots
- EHWIC
- Modular Slots Available
- 2 Slots
- Stacking Capability
- No
- 5G Support
- No
- Memory
- 2 GB
- Flash Memory
- 256 MB
- Interface Ports
- RJ-45
- Power
- 65W
- Device Type
- Router
- Product Name
- Cisco ISR4321 Integrated Services Router
- Height
- 1.75 inches
- Width
- 17.3 inches
- Depth
- 16.1 inches
- Weight
- 12.3 lbs
ISR4321-V/K9 Use Case
Secure Branch Office Connectivity with Integrated Unified Communications
In a national retail chain scenario, the Cisco ISR4321-V/K9 bundle with UC License creates encrypted IPsec VPN tunnels across 50+ stores and delivers carrier-grade voice and data over a single device. Leveraging Cisco Unified Communications Manager Express and built-in voice gateways, this solution cuts operational complexity by 40%, enforces end-to-end QoS for VoIP, and centralizes network and telephony management—ensuring consistent, high-quality communications in every location.
High-Performance Cloud On-Ramp for Unified Collaboration
Professional services firms deploy the Cisco ISR4321-V/K9 with UC License as an application-aware on-ramp to SaaS UC platforms like Webex, Microsoft Teams and Office 365. By combining SD-WAN connectivity, granular QoS and secure voice gateways, the router delivers 99.9% uptime, reduces jitter by up to 60%, and accelerates video conferencing. The outcome: a highly responsive, reliable collaboration environment that boosts productivity and meets stringent SLAs.
Regulatory-Compliant Unified Communications for Remote Finance Teams
A distributed financial advisory firm uses the Cisco ISR4321-V/K9 bundle with UC License to enforce encrypted SIP/H.323 voice and video calls, integrate Cisco Unified Border Element, and apply advanced firewall segmentation. This deployment achieves PCI and Dodd-Frank compliance, cuts deployment time by 50% through reusable templates, and delivers a trusted, auditable communications backbone—ensuring secure, high-quality client interactions under strict regulatory mandates.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| ISR4321-V/K9 |  ISR4451-X-AX/K9 |  ISR4461-AXV/K9 |  ISR4321-AXV/K9 |  ISR4221-SEC/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Modular | Modular | Fixed | Fixed |
| Broadband | N/A | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention |
| Compliance Standards | FCC, CE | FCC / CE | FCC / CE / UL | FCC, CE | IEEE 802.3, FCC, CE |
| Connectivity Type | Wired / Ethernet | Wired | Wired | Wired | Wired |
| Depth | 16.1 inches | 16.90 inches | N/A | 18.3 inches | 11.3 inches |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | FCC / CE | N/A | CISPR22, FCC Part 15 | CISPR 22 |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | EHWIC | EHWIC / NIM | EHWIC / NIM | NIM / EHWIC | EHWIC |
| Features | VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN / VoIP / IPv6 Compatible / Firewall / MPLS / Syslog | VPN / Firewall / IPv6 Compatible / QoS | Mesh / VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN / IPv6 Compatible / Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 512 MB | 1 GB | 256 MB | 1 GB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount / Desktop | Desktop |
| Height | 1.75 inches | 1.75 inches | N/A | 1.75 inches | 1.73 inches |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video | Voice / Video | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice / Video |
| Interface Ports | RJ-45 | RJ-45 / SFP | RJ-45 / SFP / Combo Ports | RJ-45 / SFP | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 2 GB | 4 GB | 4 GB | 512 MB | 1 GB |
| Modular Slots Available | 2 Slots | 3 Slots | 3+ Slots | 2 Slots | 1 Slot |
| Network Protocols | IPv4, IPv6 | IPv4 / IPv6 / MPLS | IPv4 / IPv6 | IPv4, IPv6 | IPv4, IPv6 |
| Power | 65W | 350W | 370W | 54 W | 65W |
| Power Source | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant |
| Product Name | Cisco ISR4321 Integrated Services Router | Cisco ISR4451-X-AX/K9 | Cisco ISR 4461 Integrated Services Router | Cisco ISR4321-AXV/K9 | Cisco ISR 4221-SEC/K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH, Telnet, SNMP | Cisco IOS XE CLI / SNMP / NetConf | SSH / Telnet / SNMP | SSH, Telnet, SNMP | SSH, Telnet, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing / MPLS |
| Safety | N/A | UL / CSA | N/A | RoHS Compliant | UL, cUL |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | No | No | Yes | Yes | No |
| Telecom | N/A | N/A | N/A | TIA/EIA | FCC Part 15 |
| Throughput Capacity | 300 Mbps | 2 Gbps | 1 Gbps | 200 Mbps | 300 Mbps |
| Use Case | Enterprise | Enterprise | Enterprise | Enterprise / Branch | Enterprise |
| VPN Support | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / DMVPN / FlexVPN / N/A | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 12.3 lbs | 17.6 lbs | N/A | 13.2 lbs | 8.6 lbs |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 17.3 inches | 17.32 inches | N/A | 17.5 inches | 17.2 inches |
| Wireless Support | No | No | No | No | No |
Reviews & Ratings
A
Andrew Collins
5
Reliable ISR for voice workloads. Easy to configure and performs well in daily business operations.
D
David Reynolds
5
Good choice for smaller branches needing Cisco voice services. Consistent uptime and predictable behavior.
J
James Whitaker
4
Cisco reliability with integrated UC licensing. No call drops or performance issues so far.
R
Robert Mason
4
Straightforward deployment and dependable voice handling. Meets expectations for a branch router.
Questions & Answers
What is the Cisco ISR 4321 Bundle w/ UC License (ISR4321-V/K9)?
The Cisco ISR 4321 Bundle w/ UC License is an integrated services router with built-in unified communications features for small to medium offices, delivering routing, security, voice, and video in a single platform.
What are the key performance specifications of the ISR4321-V/K9?
The ISR4321-V/K9 delivers up to 50 Mbps throughput, supports 50 VPN tunnels, and can handle 24,000 concurrent sessions, ensuring reliable performance for cloud and voice workloads.
Which unified communications features are included in the UC License?
The UC License provides bundled Cisco Unified Communications Manager Express (CME), voicemail, auto-attendant, SIP trunking, and up to four digital voice lines for integrated telephony.
How many users can the Cisco ISR 4321 Bundle support?
With its UC License, the ISR 4321 supports up to 50 voice endpoints and 100 total users, making it ideal for small to medium-sized deployments.
What security capabilities are built into ISR4321-V/K9?
The router features Cisco IOS firewall, Zone-Based Policy Firewall, intrusion prevention, URL filtering and VPN client support to safeguard your network and communications.
Which network interfaces are available on the ISR4321-V/K9?
The device includes two GE WAN ports, two GE LAN ports, one onboard PoE option, one microSD slot and an optional 4-port voice interface module.
Can I deploy this router in a branch-office environment?
Yes, the ISR4321-V/K9 is optimized for branch offices, offering integrated routing, security, and unified communications to streamline office connectivity and voice services.
How do I configure the UC License on the Cisco ISR 4321?
After installing the license, use Cisco CLI commands under the 'voice register global' and 'telephony-service' configuration modes to enable UC features; consult the Cisco configuration guide for step-by-step instructions.
Does the ISR4321-V/K9 support SIP trunking?
Yes, it natively supports SIP trunking for direct VoIP connectivity to service providers, reducing telephony costs and simplifying trunk management.
Is the Cisco ISR 4321 compatible with Cisco DNA Center?
The ISR4321-V/K9 is DNA-ready and can be managed via Cisco DNA Center for policy-based automation, assurance, and zero-touch deployment.
What power supply options does the ISR4321-V/K9 offer?
It ships with an external power adapter and supports an optional internal redundant power supply module for higher availability.
What operating system does the ISR 4321 run?
The router runs Cisco IOS XE, a modular OS that supports advanced features, continuous evolution, and in-service software upgrades for minimal downtime.
What is the warranty and support for ISR4321-V/K9?
Cisco includes a limited lifetime hardware warranty and 90-day software warranty, with optional SMARTnet service for 24×7 technical support and next-business-day hardware replacement.
How does the ISR4321-V/K9 differ from the standard ISR4321?
The -V/K9 bundle includes the Unified Communications License and voice interface module, whereas the standard ISR4321 requires separate UC licensing and voice hardware add-ons.
What deployment scenarios are ideal for the Cisco ISR 4321 Bundle?
Ideal scenarios include branch offices, retail locations, and remote sites requiring integrated routing, security, and voice/video communications in a single device.
How do I order the Cisco ISR4321-V/K9?
Order through authorized Cisco resellers or via Cisco’s online portal using SKU ISR4321-V/K9; consult your reseller for pricing, lead times, and bundle options.