United States$5,000,000+
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Christopher Young
5
Cisco ONE licensing simplified our procurement. The router performs reliably and supports our standard branch configurations.
C1-CISCO1921/K9
Cisco ONE - ISR 1921
FEATURED DEAL
Name:
C1-CISCO1921/K9
- Description:
- Cisco ONE - ISR 1921
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 31112683034
- Condition:
- Warranty:
- 3
- List Price:
$1,195.00
- Price:
$753.0037% off
Quantity:
1
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C1-CISCO1921/K9 Overview
C1-CISCO1921/K9 is a fixed-architecture integrated services router that delivers secure data, voice, and video connectivity for small business and branch office deployments. It offers dual WAN ports and a four-port 10/100 Ethernet LAN switch, providing reliable network connectivity and performance for diverse use cases.
C1-CISCO1921/K9 incorporates integrated voice services, robust VPN capabilities (including IPSec, GRE, and DMVPN), and modular expansion via EHWIC slots. With efficient power options, built-in firewall and intrusion prevention features, and throughput optimized for branch environments, this router is well suited for secure, scalable connectivity without redundancy features.
C1-CISCO1921/K9 price is $753.00, a 37% saving from the Cisco list price of $1,195.00. C1-CISCO1921/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C1-CISCO1921/K9 for additional pricing. Browse the full Router Isr 1900 series or explore all Cisco products.
C1-CISCO1921/K9 Specifications
- Product Type
- Enterprise Router
- VPN Support
- IPSec / GRE / DMVPN
- Power Source
- AC Power Supply
- Routing Protocols
- OSPF / BGP / EIGRP / 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
- Wi-Fi Standard
- N/A
- Connectivity Type
- Wired
- Network Protocols
- IPv4, IPv6
- Remote Management
- Telnet, SSH, SNMP
- Compliance Standards
- FCC, CE, RoHS
- Wireless Support
- No
- Speed/Capacity
- N/A
- Firewall Features
- Yes
- Features
- VPN / VoIP / IPv6 Compatible / Firewall
- Use Case
- Small Business
- Management
- Managed
- Form Factor
- Desktop
- Integrated Services
- Voice
- High Availability Support
- Not Supported
- Safety
- UL, cUL
- EMC
- FCC / CE
- Telecom
- TIA/EIA
- Throughput Capacity
- 0.075
- 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
- 256 MB
- Flash Memory
- 256 MB
- Interface Ports
- RJ-45
- Power
- 65
- Device Type
- Router
- Product Name
- C1-CISCO1921/K9
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
C1-CISCO1921/K9 Use Case
Secure Site-to-Site VPN for Branch Office Networking
In a mid-sized enterprise with 20 distributed branches, the C1-CISCO1921/K9-Cisco ONE - ISR 1921 establishes scalable DMVPN tunnels over broadband, enabling encrypted site-to-site connectivity with centralized policy and key management. The solution reduces MPLS costs, delivers high-throughput AES-256 encryption and simplifies network orchestration for consistent WAN performance.
High-Performance Voice and Video Prioritization
When deploying Unified Communications across multiple remote sites, the C1-CISCO1921/K9-Cisco ONE - ISR 1921 leverages integrated Quality of Service and Cisco ONE application licensing to classify, queue and prioritize VoIP and video traffic. This ensures sub-20 ms latency, zero packet loss on voice streams and crystal-clear collaboration, boosting customer satisfaction and operational efficiency.
Advanced Security with Integrated Threat Defense
For SMBs requiring enterprise-grade protection, the C1-CISCO1921/K9-Cisco ONE - ISR 1921 combines Cisco Firepower NGIPS, URL filtering and AMP malware defense in a single platform. It delivers real-time intrusion prevention, reduces vulnerability exposure and maintains sub-millisecond inspection latency, ensuring regulatory compliance and uninterrupted business continuity.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 C1-CISCO1921/K9 |  CISCO1941W-E/K9 |  C1921-3G-V-SEC/K9 |  C1921-3G-G-SEC/K9 |  C1-CISCO1941/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | N/A | N/A | N/A | 3G | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention / VPN | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention |
| Compliance Standards | FCC, CE, RoHS | IEEE / FCC / CE | FCC, CE, ETSI | FCC / CE | FCC / CE |
| Connectivity Type | Wired | Wired / Wireless / Ethernet | Wired | Wired | Wired |
| Depth | N/A | 14.4 inches | 11.1 inches | 11.5 inches | 12.5 inches |
| Device Type | Router | Router | Router | Router | Router |
| EMC | FCC / CE | N/A | FCC Class B | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | EHWIC | EHWIC | NIM | EHWIC | EHWIC |
| Features | VPN / VoIP / IPv6 Compatible / Firewall | VPN / VoIP / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall | VPN / Firewall / IPv6 Compatible / MPLS | VPN / Firewall / IPv6 Compatible / Integrated Services |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 128 MB | 256 MB | 128 MB |
| Form Factor | Desktop | Desktop | Rack-mount | Rack-mount | Desktop / Rack-mount |
| Height | N/A | 1.73 inches | 1.7 inches | 1.75 inches | 1.73 inches |
| High Availability Support | Not Supported | Supported | Not Supported | Supported | Not Supported |
| Integrated Services | Voice | Voice / Video | Voice / Video / WAN Optimization | Voice | Voice / Video / WAN Optimization |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | N/A | 4 LAN Ports | 2 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 512 MB | 256 MB | 256 MB | 256 MB |
| Modular Slots Available | 2 Slots | 2 Slots | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4, IPv6 | IPv4 / IPv6 / TCP / UDP / ICMP | OSPF, EIGRP, BGP, RIP, Static Routing | IPv4 / IPv6 / MPLS | IPv4 / IPv6 |
| Power | 65 | 65W | 65 Watt | 65 W | 54 W |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply / Redundant Power Supply | AC Power Supply |
| Product Name | C1-CISCO1921/K9 | CISCO1941W-E/K9 | Cisco 1921 Integrated Services Router with 3G, Voice, and Security | Cisco 1921 Integrated Services Router (C1921-3G-G-SEC/K9) | C1-CISCO1941/K9 Cisco 1941 Integrated Services Router |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet, SSH, SNMP | CLI / SNMP / Cisco SDM | Telnet, SSH, SNMP | SSH / Telnet / SNMP | Telnet / SSH / SNMP / HTTP / HTTPS |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | EIGRP / OSPF / RIP / BGP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | UL, cUL | N/A | IEC 60950 | N/A | N/A |
| Speed/Capacity | N/A | Fast Ethernet | N/A | N/A | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | TIA/EIA | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.075 | 0.05 Gbps | 0.025 Gbps | 0.05 Gbps | N/A |
| Use Case | Small Business | Business | Enterprise | Enterprise | Enterprise / Business |
| VPN Support | IPSec / GRE / DMVPN | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN | IPSec / DMVPN | IPSec VPN / SSL VPN / DMVPN |
| WAN Configuration | Dual WAN | Dual WAN | WAN | Dual WAN | WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | N/A | 11 lbs | 7 lbs | 12 lbs | 11.8 lbs |
| Wi-Fi Standard | N/A | WiFi 4 | N/A | N/A | N/A |
| Width | N/A | 17.5 inches | 17.3 inches | 17.3 inches | 17.1 inches |
| Wireless Support | No | Yes | No | No | No |
Reviews & Ratings
H
Hannah Wilson
4
Good value bundle for enterprise deployments. Performance is consistent, and licensing flexibility is a big plus.
J
James O'Connor
5
Works well as a core branch router. Stable operation and predictable behavior under daily business workloads.
R
Rachel Adams
3
Easy to deploy and manage. Fits perfectly into our Cisco-based network strategy.
B
Benjamin Carter
4
Reliable, proven hardware with flexible licensing. Ideal for organizations standardizing on Cisco ISR platforms.
Questions & Answers
What is the Cisco ONE ISR 1921 (SKU C1-CISCO1921/K9)?
The Cisco ONE ISR 1921 (SKU C1-CISCO1921/K9) is an integrated services router delivering enterprise-grade routing, security, and application performance bundled with a Cisco ONE software subscription.
What routing throughput does the Cisco ISR 1921 deliver?
The Cisco ISR 1921 delivers up to 50 Mbps of throughput by default and can be scaled to 100 Mbps with a Performance on Demand license.
Which network interfaces are available on the Cisco ISR 1921?
The Cisco ISR 1921 includes two onboard Gigabit Ethernet WAN ports, two Gigabit Ethernet LAN ports, plus slots for NIM and SM expansion modules.
Does the Cisco ISR 1921 support Power over Ethernet (PoE)?
The base Cisco ISR 1921 does not include PoE, but you can enable PoE via an optional Universal PoE Network Interface Module.