United States$5,000,000+
Inventory Delivered By
M
Michael Harrington
5
Cisco ONE licensing made rollout simple. Performance has been stable and well suited for branch routing needs.
C1-CISCO4321/K9
Cisco ONE ISR 4321 (2GE.2NIM.4G FLASH.4G DRAM.IPB)
FEATURED DEAL
Name:
C1-CISCO4321/K9
- Description:
- Cisco ONE ISR 4321 (2GE.2NIM.4G FLASH.4G DRAM.IPB)
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 818242961542
- Condition:
- Warranty:
- 3
- List Price:
$3,745.00
- Price:
$1,970.0047.4% off
Quantity:
1
Business price:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Shipping:
Payment:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Need Additional Discount on Product?
Request a quote below - Get Exclusive Pricing and Support.
Shipping:
Payment:
TRUSTED, TRIED, PROVEN
Officially Accredited
& Verified By
Next-Gen IT
Solutions Powered By
C1-CISCO4321/K9 Overview
C1-CISCO4321/K9 is an enterprise-class integrated services router engineered with a modular architecture that supports a wide array of integrated services including voice, video, and WAN optimization. Built to deliver robust security and reliable connectivity, this router efficiently handles VPN features, advanced routing protocols, and firewall functions while ensuring performance and redundancy in mission‐critical applications.
C1-CISCO4321/K9 comes with versatile power options featuring an AC power supply with redundant capabilities, and its dual WAN configuration alongside modular LAN interfaces provide flexible connectivity. Designed for secure, high-performance networking, it offers integrated VPN support, high availability, and throughput capacity tailored to demanding enterprise and branch office use cases.
C1-CISCO4321/K9 price is $1,970.00, a 47.4% saving from the Cisco list price of $3,745.00. C1-CISCO4321/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C1-CISCO4321/K9 for additional pricing. Browse the full Router Isr 4000 series or explore all Cisco products.
C1-CISCO4321/K9 Specifications
- Product Type
- Enterprise Router
- VPN Support
- IPSec / SSL VPN / DMVPN / FlexVPN
- Power Source
- AC Power Supply with Redundant Options
- Routing Protocols
- OSPF / BGP / EIGRP / RIP / Static Routing
- Broadband
- N/A
- Architecture
- Modular
- WAN Configuration
- Dual WAN
- WAN Ports
- 2 WAN
- LAN Ports
- Modular LAN
- Ethernet Technology
- 10/100/1000
- Wi-Fi Standard
- N/A
- Connectivity Type
- Wired
- 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 / WAN Optimization
- Use Case
- Enterprise
- Management
- Managed
- Form Factor
- Rack-mount
- Integrated Services
- Voice / Video / WAN Optimization
- High Availability Support
- Supported
- Safety
- N/A
- EMC
- N/A
- Telecom
- N/A
- Throughput Capacity
- 0.15 Gbps
- QoS Features
- Supported
- Built-in Security Features
- Firewall / Intrusion Prevention
- Expansion Slots
- NIM / EHWIC
- Modular Slots Available
- 2 Slots
- Stacking Capability
- No
- 5G Support
- No
- Memory
- 1 GB
- Flash Memory
- 512 MB
- Interface Ports
- RJ-45 / SFP
- Power
- 110 W
- Device Type
- Router
- Product Name
- Cisco 4321 Integrated Services Router (C1-CISCO4321/K9)
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 20 inches
- Weight
- 14 lbs
C1-CISCO4321/K9 Use Case
Secure Multi-site SD-WAN and Encrypted VPN for Retail Branches with C1-CISCO4321/K9
A national retail chain deploys Cisco ONE ISR 4321 (C1-CISCO4321/K9) routers at 100 locations to establish dynamic SD-WAN overlays and encrypted DMVPN connections to the corporate data center, optimizing POS transactions and inventory updates over dual 1 GbE links. Advanced QoS and IP routing modules ensure sub-10 ms failover while reducing MPLS leased-line costs by 45%. Benefit: Scalable, resilient branch connectivity with 99.99% availability and lower operational expenses.
High-Performance Cloud On-Ramp to AWS and Azure with Cisco ONE ISR 4321
A global financial services firm leverages the C1-CISCO4321/K9 Cisco ONE ISR 4321 to provision secure IPsec tunnels and BGP peering directly into AWS VPC and Azure ExpressRoute, providing low-latency access to Salesforce, Office 365, and trading platforms. Dual NIM slots support concurrent encryption and virtualized services, maintaining sub-20 ms WAN latency and ensuring compliance with FINRA regulations. Benefit: Accelerated SaaS performance, streamlined cloud migration, and robust security posture.
IoT Edge Security and Traffic Segmentation in Manufacturing Plants
An automotive manufacturer integrates C1-CISCO4321/K9 Cisco ONE ISR 4321 routers at multiple factory floors to segment Industrial IoT devices, PLC networks, and guest Wi-Fi using Zone-Based Firewall and VLAN tagging, while enabling 4G LTE backup for zero downtime. Built-in threat intelligence and real-time monitoring automate intrusion prevention and maintain continuous production line operations. Benefit: Enhanced IoT security with a 30% reduction in cyber incidents and uninterrupted manufacturing processes.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 C1-CISCO4321/K9 |  C1-CISCO4451/K9 |  ISR4451-X/K9 |  ISR4331-AX/K9 |  ISR4461-AXV/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Modular | Modular | Modular | Fixed / Modular | Modular |
| Broadband | N/A | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention / Malware Protection |
| Compliance Standards | FCC / CE | FCC, CE | FCC, CE | FCC / CE / UL | FCC / CE / UL |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 20 inches | 18 inches | N/A | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | FCC / CE | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | NIM / EHWIC | EHWIC / NIM | NIM / EHWIC | EHWIC / NIM | EHWIC / NIM |
| Features | VPN / VoIP / IPv6 Compatible / Firewall / WAN Optimization | VPN, VoIP, IPv6 Compatible, Firewall, MPLS | VPN / Voice / Video / Firewall / MPLS / WAN Optimization | VPN / IPv6 Compatible / Firewall / WAN Optimization / Voice / Video | VPN / Firewall / IPv6 Compatible / QoS |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 512 MB | 2 GB | 2 GB | 512 MB | 1 GB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | N/A | N/A | N/A |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization |
| Interface Ports | RJ-45 / SFP | RJ-45, SFP, Combo Ports | RJ-45 / SFP | RJ-45 / SFP | RJ-45 / SFP / Combo Ports |
| LAN Ports | Modular LAN | Modular LAN | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 1 GB | 4 GB | 4 GB | 4 GB | 4 GB |
| Modular Slots Available | 2 Slots | 3+ Slots | 2 Slots | 3+ Slots | 3+ Slots |
| Network Protocols | IPv4, IPv6 | IPv4, IPv6 | IP, IPv6, OSPF, EIGRP, BGP, RIP, MPLS | IPv4 / IPv6 | IPv4 / IPv6 |
| Power | 110 W | 250 W | 375 W | 65 Watts | 370W |
| Power Source | AC Power Supply with Redundant Options | AC Power Supply / Redundant | AC Power Supply / DC Power Supply / Redundant | AC Power Supply | AC Power Supply / Redundant |
| Product Name | Cisco 4321 Integrated Services Router (C1-CISCO4321/K9) | Cisco 4451 Integrated Services Router | Cisco ISR 4451-X/K9 | Cisco ISR4331-AX/K9 | Cisco ISR 4461 Integrated Services Router |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH / Telnet / SNMP | CLI, SNMP, Telnet, SSH | CLI / SNMP / NetConf | SSH / Telnet / SNMP | SSH / Telnet / SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / RIP / Static Routing | OSPF / BGP / EIGRP / IS-IS / RIP / Static Routing |
| Safety | N/A | N/A | N/A | UL / IEC | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | No | No | No | No | Yes |
| Telecom | N/A | N/A | N/A | TIA/EIA | N/A |
| Throughput Capacity | 0.15 Gbps | 2 Gbps | 2 Gbps | 0.15 Gbps | 1 Gbps |
| Use Case | Enterprise | Enterprise | Enterprise | Enterprise / Branch | Enterprise |
| VPN Support | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / GRE / 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 | Modular WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 14 lbs | 23 lbs | N/A | N/A | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 17.5 inches | 17.5 inches | N/A | N/A | N/A |
| Wireless Support | No | No | No | No | No |
Reviews & Ratings
D
Daniel Whitmore
4
Reliable ISR for small branches. Easy to manage and integrates smoothly into existing Cisco environments.
R
Robert Ellison
5
Consistent uptime and predictable performance. A solid entry level enterprise router.
J
James Thornton
3
Straightforward deployment with good routing capacity. Meets daily business requirements.
A
Andrew Collins
4
Cisco quality hardware with dependable results. No operational issues so far.
Questions & Answers
What is the Cisco ONE ISR 4321 and what makes it unique?
The Cisco ONE ISR 4321 is an integrated services router featuring two Gigabit Ethernet ports, two NIM slots, 4 GB flash, 4 GB DRAM, and an IP Base license, designed for secure, high-performance, and scalable connectivity in small branch and enterprise edge networks.
What key technical specifications should I know about the Cisco ONE ISR 4321?
The Cisco ONE ISR 4321 delivers up to 50 Mbps encrypted throughput with a dual-core 1.2 GHz CPU, two GE ports, two NIM slots, 4 GB DRAM, 4 GB flash, IP Base licensing, and support for Cisco DNA Center and SD-WAN features.
Which licensing options are available for the Cisco ONE ISR 4321?
The product includes the IP Base license and supports optional IP Services, Security, and AppX licenses for advanced routing, VPN, firewall, and application optimization, allowing tailored feature sets to match evolving network demands.
How do I install and set up the Cisco ONE ISR 4321 in my network?
Mount the ISR 4321 on a rack or wall plate, connect AC or optional DC power, attach network cables to the GE ports, access the Cisco IOS CLI via console for initial configuration, and deploy WAN, LAN, and security settings using Prime Infrastructure or Cisco DNA Center.