Cisco CISCO1841 1841 Modular Router – 2x Fast Ethernet, 2 WAN Slots, 64MB Flash / 256MB DRAM
Cisco CISCO1921-SEC/K9 C1921 Security Bundle
Cisco CISCO1921/K9 C1921 Modular Router
Cisco CISCO1921/K9 C1921 Modular Router is an enterprise-class branch router designed for secure and reliable connectivity in small and medium-sized business and branch-office networks. It features 2 Gigabit Ethernet ports, 2 EHWIC expansion slots, 512 MB DRAM, and IP Base software, providing flexible WAN connectivity, modular expansion, and a solid platform for professional network deployments.
Description
The Cisco CISCO1921/K9 C1921 Modular Router is a professional modular routing platform designed for branch offices, small and medium-sized businesses, and enterprise network environments. Part of the Cisco 1900 Series Integrated Services Routers, the C1921 combines Gigabit Ethernet connectivity, modular expansion, and Cisco IOS-based routing capabilities in a compact platform.
The CISCO1921/K9 configuration provides 2 Gigabit Ethernet interfaces, 2 Enhanced High-Speed WAN Interface Card (EHWIC) slots, 512 MB DRAM, and IP Base software, making it suitable for deployments that require flexible connectivity and expansion.
Key Features
- Cisco C1921 Modular Router
- Model/Part Number: CISCO1921/K9
- Cisco 1900 Series Integrated Services Router
- 2 × Gigabit Ethernet interfaces
- 2 × EHWIC expansion slots
- 512 MB DRAM
- IP Base software
- Modular architecture for flexible WAN expansion
- Cisco IOS-based networking platform
- Designed for branch-office and SMB deployments
- Supports compatible Cisco interface modules
- Suitable for professional and enterprise networking environments
Dual Gigabit Ethernet Connectivity
The Cisco C1921 provides two integrated Gigabit Ethernet interfaces, offering high-speed Ethernet connectivity for local networks and upstream network connections.
Gigabit Ethernet connectivity makes the router suitable for connecting to:
- LAN switches
- Enterprise networks
- WAN Ethernet services
- Servers and network infrastructure
- Branch-office networks
- Other routing and security devices
The two integrated interfaces can be used to establish separate network connections and support different network-design requirements.
Two EHWIC Expansion Slots
The C1921 includes two EHWIC slots, providing modular expansion capabilities for supported Cisco interface cards.
EHWIC technology allows organizations to extend the router’s connectivity with compatible modules rather than replacing the entire router when additional interfaces or specific WAN technologies are required.
This modular architecture makes the C1921 particularly useful for branch environments where network requirements may evolve over time.
512 MB DRAM
This configuration includes 512 MB of DRAM, providing memory resources for Cisco IOS operations, routing processes, and supported network services.
The available memory configuration should be considered when selecting IOS software and network features for the deployment.
IP Base Software
The CISCO1921/K9 configuration is specified with IP Base software.
IP Base provides the foundational routing and networking functionality required for standard IP network deployments. Available functionality depends on the specific Cisco IOS release and licensing configuration installed on the unit.
For deployments requiring advanced security, voice, VPN, or other specialized features, the applicable Cisco software licensing and feature set should be verified separately.
Modular Architecture
A key advantage of the C1921 is its modular design.
The two EHWIC slots allow supported expansion cards to be installed for additional connectivity options. This provides greater flexibility than a fixed-interface router and can help organizations adapt the platform to changing network requirements.
Potential applications for modular expansion include supported WAN and network interface technologies, depending on the EHWIC installed.
Branch Office Networking
The C1921 is designed for branch-office networking and can provide connectivity between local users, branch infrastructure, and corporate or service-provider networks.
Typical deployment scenarios include:
- Corporate branch offices
- Small and medium-sized businesses
- Remote offices
- Retail locations
- Professional service offices
- Educational facilities
- Legacy enterprise infrastructure
- Network laboratories
Cisco IOS Platform
The C1921 operates on the Cisco IOS networking platform, providing a familiar management and configuration environment for Cisco network administrators.
Cisco IOS can provide routing, interface configuration, network management, and other supported networking services according to the installed software release and license.
Flexible Network Expansion
The two EHWIC slots provide organizations with additional flexibility when designing their network.
Rather than relying exclusively on fixed interfaces, administrators can install compatible expansion modules according to the requirements of the deployment.
This can be particularly beneficial in branch networks where WAN technology, connectivity requirements, or interface requirements differ between locations.
Professional Network Deployment
The Cisco C1921 is suitable for organizations that require a dedicated routing platform with modular expansion capabilities.
Its combination of dual Gigabit Ethernet connectivity, dual EHWIC slots, 512 MB DRAM, and IP Base software provides a balanced platform for branch and small-business network environments.
Typical Applications
Branch Offices
Connect branch LANs to corporate or service-provider networks.
Small and Medium Businesses
Provide routing and network connectivity for professional office environments.
WAN Connectivity
Use compatible EHWIC modules to support required WAN connectivity options.
Enterprise Networks
Deploy as a branch or remote-site routing platform within a larger Cisco infrastructure.
Network Training
Useful for Cisco networking labs and hands-on routing configuration exercises.
Benefits
Dual Gigabit Ethernet: Two integrated Gigabit Ethernet ports provide high-speed network connectivity.
Modular Expansion: Two EHWIC slots allow compatible Cisco interface modules to be installed according to deployment requirements.
512 MB DRAM: Provides memory capacity for the router’s operating system and supported routing services.
IP Base: Provides the foundational Cisco IOS-based IP routing platform.
Scalable Design: Modular architecture allows the router to be adapted as network requirements change.
Enterprise-Oriented Platform: Designed for branch and professional networking environments.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Cisco |
| Series | Cisco 1900 Series |
| Model | C1921 |
| Part Number | CISCO1921/K9 |
| Product Type | Modular Integrated Services Router |
| Gigabit Ethernet Ports | 2 |
| Expansion Slots | 2 × EHWIC |
| Memory | 512 MB DRAM |
| Software | IP Base |
| Operating Platform | Cisco IOS |
| Architecture | Modular |
| Primary Use | Branch & WAN Routing |
| Target Environment | SMB / Enterprise / Branch Office |
Product Summary
The Cisco CISCO1921/K9 C1921 Modular Router is a flexible enterprise routing platform designed for branch-office and small-to-medium business networks. Equipped with 2 Gigabit Ethernet ports, 2 EHWIC expansion slots, 512 MB DRAM, and IP Base software, it provides a strong foundation for professional IP routing and modular network connectivity.
Its combination of integrated Gigabit Ethernet and expandable EHWIC interfaces makes the C1921 a practical choice for organizations requiring flexible branch routing and compatibility with Cisco modular networking infrastructure.
Product Category: Networking → Routers → Modular Routers
Brand: Cisco
Series: Cisco 1900 Series
Model: C1921
Part Number: CISCO1921/K9
Ethernet Ports: 2 × Gigabit Ethernet
Expansion: 2 × EHWIC
Memory: 512 MB DRAM
Software: IP Base
Primary Application: Branch / WAN Routing
Related products
-
HPE C7977A LTO-7 Ultrium Data Cartridge
Read more
HPE C7977A LTO-7 Ultrium Data Cartridge is a high-capacity tape storage solution designed for reliable enterprise backup, archiving, and long-term data retention. With 6TB native capacity and up to 15TB compressed capacity, this LTO-7 cartridge delivers efficient, portable, and cost-effective storage for demanding data protection environments.
Quick View -
Dell 540-BBUL Broadcom 57412 & 5720 rNDC Network Daughter Card
Read more Dell 540-BBUL Broadcom 57412 & 5720 rNDC Network Daughter Card
Upgrade your Dell PowerEdge server with the Dell 540-BBUL Broadcom rNDC, featuring 2 × 10GbE SFP+ ports (Broadcom 57412) and 2 × 1GbE RJ45 BASE-T ports (Broadcom 5720). This quad-port network daughter card provides high-speed connectivity, flexible networking options, and enterprise-class performance for virtualization, cloud computing, and data center environments.
Quick View -
Cisco CISCO1921-SEC/K9 C1921 Security Bundle
Read more Cisco CISCO1921-SEC/K9 C1921 Security Bundle is a modular enterprise router designed for secure branch-office and small-business networking. It features 2 Gigabit Ethernet interfaces, 512 MB DRAM, 256 MB Flash memory, and a Security License PAK, providing a flexible platform for IP routing and enhanced network security deployments.
Quick View -
Cisco CISCO1841 1841 Modular Router – 2x Fast Ethernet, 2 WAN Slots, 64MB Flash / 256MB DRAM
Read more
Cisco CISCO1841 1841 Modular Router is a professional Cisco 1800 Series router designed for branch offices, small businesses, and WAN networking environments. It features 2 × 10/100 Fast Ethernet ports, 2 modular WAN interface slots, 64 MB Flash memory, and 256 MB DRAM, providing flexible connectivity and expansion for routing and network infrastructure applications.
Quick View
