Cisco 4321 Integrated Service Router, ISR4321/K9
by Cisco
- Model: Cisco ISR4321/K9
- Series: Cisco 4300 Series Integrated Services Routers
- Form Factor: Desktop or Rack-mountable (1RU)
- Processor:
- Multi-core processor optimized for performance and scalability
- Embedded hardware encryption for enhanced security
- Memory:
- 4 GB DRAM (expandable) for fast data processing
- 4 GB Flash memory for system storage and software
- Network Interfaces:
- 2 x Gigabit Ethernet WAN ports (10/100/1000 Mbps) for internet or external connectivity
- 3 x Gigabit Ethernet LAN ports (10/100/1000 Mbps) for internal network connections
- 1 x USB 2.0 port for external storage or management devices
- 1 x Console port for configuration and management
- Modular Expansion:
- 2 x Enhanced High-Speed WAN Interface Card (EHWIC) slots for additional WAN connectivity (optional, sold separately)
- 1 x Network Interface Module (NIM) slot for network interface expansion (supports various connectivity options such as fiber, serial, etc.)
- 2 x Internal Service Module (ISM) slots for service module expansion (supports security, voice, and other services)
- Routing Protocols:
- Supports dynamic routing protocols including RIP, OSPF, EIGRP, and BGP
- Supports static routing for simple network configurations
- IPv4 and IPv6 routing for dual-stack network environments
- Policy-based Routing (PBR) for routing control based on policies
- Security Features:
- VPN support: IPSec VPN, SSL VPN, and DMVPN for secure remote connections
- Stateful firewall to protect the network perimeter
- Intrusion Prevention System (IPS) for proactive threat detection and prevention
- Network Address Translation (NAT) for IP address management
- Access Control Lists (ACLs) for granular traffic control and filtering
- Voice and Collaboration:
- VoIP support: Integrates with Cisco Unified Communications for voice and video communication
- Supports voice protocols such as SIP and H.323
- Integrated voice gateway support for traditional PSTN connectivity
- Quality of Service (QoS):
- QoS features for prioritizing critical applications like voice, video, and real-time data
- Ensures consistent service quality and low-latency for voice and video calls
- WAN Optimization:
- Built-in WAN optimization for more efficient bandwidth use, especially for latency-sensitive applications like video and VoIP
- Management and Monitoring:
- Managed via Cisco IOS Software CLI, Cisco Configuration Professional (CCP), or Cisco Prime Infrastructure
- SNMP, Telnet, SSH for remote monitoring and management
- Integration with Cisco DNA Center for network automation and monitoring
- Environmental Conditions:
- Operating Temperature: 32°F to 104°F (0°C to 40°C)
- Storage Temperature: -40°F to 158°F (-40°C to 70°C)
- Relative Humidity: 10% to 85% non-condensing
- Power:
- Input Voltage: AC 100-240V
- Power over Ethernet (PoE): Optional support for PoE to power devices like IP phones and access points
- Compliance:
- RoHS and WEEE compliant
- CE, UL, FCC, VCCI, CB Scheme, KC certified
- Dimensions:
- Height: 1.75 inches (4.4 cm)
- Width: 17.2 inches (43.7 cm)
- Depth: 14.0 inches (35.5 cm)
- Weight: 6.6 lbs (3 kg)
| Model Number | ISR4321/K9 |
|---|---|
| SKU | 6601 |
Reviews
Description
Cisco 4321-K9 Integrated Service Router ISR4321/K9
The Cisco ISR4321/K9 Integrated Services Router is a powerful and flexible networking solution designed for small to medium-sized branch offices and businesses. Part of Cisco's 4300 Series, this router combines high performance, security, and advanced services in a compact form factor.
With its multi-core processor and 4 GB of RAM, the ISR4321 offers exceptional performance for routing, security, and application services, making it ideal for organizations requiring high throughput, reliability, and scalability. It supports 2 Gigabit Ethernet WAN ports for flexible external connectivity and 3 Gigabit Ethernet LAN ports for internal network connections, providing the foundation for robust communication and data transfer.
The ISR4321 is highly modular, featuring 2 EHWIC slots, 2 ISM slots, and a NIM slot, allowing businesses to expand and adapt the router to meet future needs, whether for additional WAN interfaces, security features, or voice services. Its support for VPNs, stateful firewalls, Intrusion Prevention Systems (IPS), and Access Control Lists (ACLs) ensures a secure and resilient network environment.
This router is also VoIP-ready, offering integration with Cisco Unified Communications and delivering high-quality voice and video services. The built-in Quality of Service (QoS) ensures that real-time applications such as voice and video are prioritized, minimizing latency and ensuring high performance.
Whether used for secure internet access, site-to-site VPNs, or unified communications, the Cisco ISR4321 provides the flexibility, performance, and security needed to support modern business applications. Additionally, with features such as IPv4/IPv6 routing, dynamic and static routing protocols, and WAN optimization, this router is an ideal choice for businesses looking to improve their network infrastructure while maintaining future-proof capabilities.
