Cisco ISR4321/K9 ISR 4321 2 Ports 4 Slots Security Router Refurbished

The Cisco ISR4321/K9 Integrated Service Router, part of the ISR Series, is a powerful and versatile network device designed for a wide range of applications. In this comprehensive guide, we'll delve into its features, capabilities, and benefits, shedding light on why it's a preferred choice for many businesses. The Cisco ISR4321/K9 is a robust integrated service router that combines multiple functions into a single device. With 2 ports and 4 slots, it offers exceptional performance and scalability, making it an ideal solution for businesses of all sizes.

• Gigabit Ethernet Ports: The router is equipped with Gigabit Ethernet ports that provide high-speed connectivity for data transmission. These ports ensure rapid data transfer, facilitating smooth and efficient network operations.
• Expansion Slots: With 4 expansion slots, the ISR4321/K9 allows for additional modules to be added, offering flexibility and customization to meet specific network requirements.
• Rack-Mountable and Wall-Mountable The router is designed to be versatile in terms of installation. It can be rack-mounted, which is suitable for data centers and server rooms. Alternatively, it can be wall-mounted, making it ideal for smaller offices or spaces with limited rack infrastructure.
• Gigabit Ethernet Security The Cisco ISR4321/K9 prioritizes network security, a critical concern in today's digital landscape. It comes equipped with advanced security features to safeguard your data and infrastructure.
• Firewall Protection: The router provides firewall protection to block unauthorized access and secure your network from external threats.
• VPN Support: Virtual Private Network (VPN) capabilities ensure secure and encrypted communication between remote sites or users.
• Intrusion Prevention System (IPS): An integrated IPS adds an extra layer of security by detecting and preventing potential threats in real time.

• The ISR4321/K9 is highly adaptable and can be tailored to meet the evolving needs of your network. The availability of expansion slots allows you to add modules like network interface cards (NICs), increasing the router's functionality as your business grows.
• Quality of Service (QoS) The router supports Quality of Service (QoS) features, which enable you to prioritize specific types of traffic on your network. This ensures that critical applications and services receive the necessary bandwidth and perform optimally.
• Cisco IOS Software The Cisco ISR4321/K9 runs on Cisco's renowned IOS (Internetwork Operating System) software. This operating system is known for its reliability, security, and robustness. It provides a stable platform for network management and control.
• Energy Efficiency Cisco has designed the ISR4321/K9 with energy efficiency in mind. It's a green solution that helps reduce power consumption and, in turn, operational costs.

The Cisco ISR 4321 is a router designed for small and medium-sized businesses, enterprise branch offices, and service provider edge applications. It is equipped with 2 network interface slots and 4 service module slots, which can be used to add a variety of connectivity and service options. The router is powered by a dual-core Intel Xeon processor and has 2GB of RAM and 8GB of flash memory, making it capable of handling a wide range of routing, security, and data services applications. It also supports Cisco IOS XE software, which provides a flexible and scalable platform for implementing advanced routing and services functions.

Some of the key features of the Cisco ISR 4321 include:

• Support for a wide range of connectivity options, including Ethernet, serial, and WAN interface cards.
• Integration with Cisco security technologies, such as firewall, VPN, and content filtering.
• Advanced Quality of Service (QoS) features for optimizing voice and video traffic.
• Support for Cisco IOS XE software, which provides a flexible and scalable platform for implementing advanced routing and services functions.
• Integration with Cisco Network Assistance, a powerful tool for managing and configuring the router.
• Support for a range of applications, including routing, security, voice, and video.

The Cisco ISR 4321 security router supports several high availability (HA) features that help ensure continuous network operation in the event of a hardware or software failure. Some of the key HA features supported by the ISR 4321 include:

• Stateful Switchover (SSO): This feature provides a mechanism for the router to switch over to a standby processor in the event of a primary processor failure. The standby processor maintains a synchronized state with the primary processor, so there is no loss of data during the switchover.
• Hot Standby Router Protocol (HSRP): This feature provides automatic failover for IP networks by allowing a set of routers to share a virtual IP address. In the event of a router failure, the standby router can take over the virtual IP address and continue forwarding packets.
• Virtual Router Redundancy Protocol (VRRP): Similar to HSRP, VRRP allows a set of routers to share a virtual IP address. However, VRRP allows for more than two routers to participate in the redundancy group, providing greater scalability.
• Gateway Load Balancing Protocol (GLBP): This feature provides load balancing and redundancy for IP traffic by allowing multiple routers to share a virtual IP address. GLBP can distribute traffic across multiple paths, and can also provide automatic failover in the event of a router failure.
• Network Address Translation (NAT) redundancy: This feature provides redundancy for NAT configurations by allowing multiple routers to share NAT translations. If one router fails, the other router can take over the NAT translations.
• To implement these HA features on the Cisco ISR 4321, you will need to follow the specific configuration instructions provided by Cisco. The configuration guides and documentation available on the Cisco website provide step-by-step instructions on how to configure these features on the ISR 4321. It is also recommended to consult with a Cisco-certified network engineer for assistance with configuring high availability on your network.

The Cisco ISR 4321 router is a highly capable network device that offers a range of WAN connectivity options to suit different requirements. Some of the WAN connectivity options available for the ISR 4321 include:

• Ethernet WAN: The ISR 4321 router comes with two built-in Gigabit Ethernet WAN ports that can be used to connect to high-speed broadband Internet services. These ports can be used with different types of WAN technologies, including DSL, cable, and fiber.
• T1/E1 WAN: The ISR 4321 also supports T1/E1 WAN connectivity using the built-in HWIC-2T1/E1 module. This allows for the use of leased lines or other types of dedicated circuits for WAN connectivity.
• Serial WAN: The ISR 4321 can also support legacy serial WAN connectivity using the built-in HWIC-2T module. This allows for the use of synchronous or asynchronous serial connections for WAN connectivity.
• LTE Wireless WAN: The ISR 4321 can support wireless WAN connectivity using a Cisco LTE module, such as the Cisco EHWIC-4G-LTE or Cisco EHWIC-4G-LTE-G. This allows for high-speed mobile broadband connectivity using cellular networks.
• Satellite WAN: The ISR 4321 can also support satellite WAN connectivity using the built-in HWIC-4B-S/T module. This allows for the use of satellite-based connectivity for remote sites or locations where terrestrial connectivity is not available.
• To determine the most appropriate WAN connectivity option for your network, you should consider factors such as bandwidth requirements, geographic location, availability of service providers, and cost. It may also be helpful to consult with a Cisco-certified network engineer to help you evaluate your options and design a network that meets your specific needs.

• Manufacturer: Cisco
• Part Number or SKU # ISR4321/K9
• Product Series: 4000
• Product Model: 4321
• Product Name: 4321 Router
• Product Type: Router

• Total Number of Ports: 2
  
• USB: Yes
• Powerline: No
• Management Port: Yes
• Serial V.35 Interface: No
• Number of Network (RJ-45) Ports: 2

• Number of Total Expansion Slots: 4
  
• Expansion Slot Type: Smart Interface Card (SIC)
• Expansion Slot Type: Network Interface Module (NIM)
• Expansion Slot Type: SFP

• Network Technology: 10/100/1000Base-T
• Ethernet Technology: Gigabit Ethernet

• Security Features:
  
• ACL
• RADIUS
• AAA
• IPsec
• DMVPN

• Standard Memory: 4 GB
  
• Maximum Memory: 8 GB
• Memory Technology: DDR3 SDRAM
• Flash Memory: 4 GB

Power Description

• Input Voltage 230 V AC
  
• Input Voltage 120 V AC
• Power Source PoE
• Power Source Power Supply
• Redundant Power Supply No

In Summary, the Cisco ISR4321/K9 Integrated Service Router is a powerful and versatile networking solution for businesses and organizations. With its high-performance routing, security features, and flexibility in mounting options, it's an ideal choice for meeting the demands of modern networking. Whether you need a secure and scalable router for a small office or a data center, the ISR4321/K9 has you covered. Invest in the Cisco ISR4321/K9 for a dependable and efficient network infrastructure.