Brand: Cisco · SKU: C1-CISCO4321/K9 · MPN: C1-CISCO4321/K9 · Category: Networking
The C1-CISCO4321/K9 is an enterprise-class Integrated Services Router (ISR) from the Cisco 4000 Family, engineered with a modular architecture to support a wide array of integrated services including voice, video, and WAN optimization. It is designed for small enterprise branch environments, offering robust security, reliable connectivity, support for advanced routing protocols, and firewall functions. This model comes with two Gigabit Ethernet ports, two Network Interface Module (NIM) slots, 4GB of Flash memory, and 4GB of DRAM. It supports pay-as-you-grow performance, capable of scaling throughput from a default of 50 Mbps up to 100 Mbps with the purchase of specific licenses (FL-4320-PERF-K9). The platform is modular, supporting features like integrated VPN (IPSec/SSL/DMVPN/FlexVPN), VoIP, IPv6 compatibility, and WAN optimization. It is rack-mountable in a 1U form factor. Note that this model officially has an End-of-Life date, with service support ending on 2027-10-31.
| DRAM | 4 GB |
|---|---|
| NIM Slots | 2 |
| Form Factor | Rack-mount (1U) |
| VPN Support | IPSec / SSL VPN / DMVPN / FlexVPN |
| Flash Memory | 4 GB (Default, Max 8 GB) |
| Power Supply | External AC Power Supply (Redundant Supported: No) |
| Product Type | Enterprise Router |
| Product Model | 4321 |
| VoIP Supported | Yes |
| Onboard ISC Slot | 1 |
| Firewall Features | Yes |
| Onboard Ports (GE) | 2 (2 RJ-45 Copper, 1 SFP) |
| Ethernet Technology | 10/100/1000Base-T |
| Aggregate Throughput (Default/Max) | 50 Mbps to 100 Mbps |
| Warranty | 90 Day (Limited Warranty mentioned in one source) |
| Weight | 9.14 lb (Approximate) |
| Dimensions | 1.8" (H) x 14.6" (W) x 11.6" (D) (Rack Unit: 1U) |
The Cisco C1-CISCO4321/K9 is a high-performance, modular Integrated Services Router (ISR) from the 4000 series, ideal for securing and managing WAN communications in small enterprise branch offices. It features 2 Gigabit Ethernet ports, 2 NIM slots for flexible expansion, 4GB RAM, and 4GB Flash memory. Its architecture supports concurrent execution of various application-aware services while maintaining scalable performance up to 100 Mbps via licensing. The platform includes integrated security features, supports advanced routing protocols, and offers modular interfaces with Online Removal and Insertion (OIR) capabilities.
Network Security Admins
Leaf-Spine Data Center Fabrics
"Scaling a Leaf-Spine Data Center Fabrics requires hardware that ensures packet integrity; the Cisco C1-CISCO4321/K9 is design-optimized for this specific role in the network stack."
Yes, this Cisco ONE ISR 4321 Integrated Services Router (2GE, 2NIM, 4G FLASH, 4G DRAM, IPB) (C1-CISCO4321/K9) is 100% genuine Cisco hardware. All our products are verified by certified technicians and come with clean serial numbers ready for service contract registration.
This Cisco ONE ISR 4321 Integrated Services Router (2GE, 2NIM, 4G FLASH, 4G DRAM, IPB) includes our standard 3-Year Warranty covering all manufacturing defects. We also offer advanced replacement options for minimal downtime.
We offer free ground shipping which typically takes 3-5 business days. Expedited shipping options are available at checkout for faster delivery.
Yes, we have a 30-day return policy on all products. Restocking fees may apply for opened items. Please see our return policy for complete details.
Please check the specifications tab for detailed compatibility information. Our technical team is available to assist with compatibility questions for the C1-CISCO4321/K9.