Cisco Integrated Services Router ISR 4321 (ISR4321/K9) 50-100 Mbps for Small to Medium Branch Offices

Cisco ISR 4321: Versatile Router for Small to Medium Branches

The Cisco Integrated Services Router (ISR) 4321 (ISR4321/K9) is a high-performance Cisco Router designed for small to medium-sized branch offices. It offers a flexible architecture with integrated services, security, and application visibility, making it an ideal choice for modern enterprise environments. While not a Cisco Network Switch or Cisco Wireless AP directly, it provides the essential network foundation for these crucial components.

Optimized Performance for Branch Services

The ISR 4321 delivers flexible performance from 50 Mbps (default) up to 100 Mbps with a performance license. This ensures it can handle diverse branch office traffic, including data, voice, and video, providing a smooth experience for users.

Modular Design for Scalability

This Cisco Router features a modular design with two Network Interface Module (NIM) slots and one Service Module (SM) slot. This allows for easy customization and expansion of WAN, LAN, and voice services as your business needs evolve.

Integrated Security & Unified Communications

The ISR 4321 comes with robust security features, including advanced threat protection and VPN capabilities, safeguarding your branch network. It also supports unified communications, enabling secure and reliable voice and video services.

Foundation for Wired & Wireless Networks

Serving as the central point for branch connectivity, the ISR 4321 effectively integrates with Cisco Network Switch deployments for wired access. It also provides the critical, secure backbone infrastructure necessary for high-performance Cisco Wireless AP solutions to function optimally.

Cisco ISR 4321 (ISR4321/K9) Detailed Parameters

Parameter Category	Parameter	Specification
Device Type	Model	ISR 4321
	Part Number	ISR4321/K9
	Form Factor	1RU Desktop/Rackmount
Performance	Aggregate Throughput (Default)	50 Mbps
	Aggregate Throughput (Boost License)	Up to 100 Mbps
Connectivity	Onboard GE WAN/LAN Ports	2 (RJ-45)
	NIM Slots	2
	SM Slots	1
	USB 2.0 Ports (Type A)	2
	USB Console Port (Type B mini)	1
	Serial Console Port (RJ-45)	1
Memory	Default DRAM	4 GB
	Maximum DRAM	8 GB
	Default Flash Memory	4 GB
	Maximum Flash Memory	4 GB
Software & Licenses	Operating System	Cisco IOS XE
	Included Licenses	IPBase (base routing)
	Optional Licenses	Performance License, Unified Communications (UC), Security (SEC)
Power	Power Supply	External AC
	AC Input Voltage	100 to 240 VAC
Physical Specifications	Dimensions (H x W x D)	44.55 x 369.6 x 294.6 mm (1.75 x 14.55 x 11.6 inches)
	Weight (Approximate)	3.5 kg (7.72 lbs)
	Form Factor	Desktop or Rack-mountable (with optional kit)
Environmental	Operating Temperature	0°C to 40°C
	Operating Humidity	5% to 85% non-condensing
Compliance	Safety	UL 60950-1, EN 60950-1, IEC 60950-1, etc.
	EMC	FCC Part 15 Class A, EN55022 Class A, CISPR22 Class A, etc.