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Secure Edge Router for Small Offices – Cisco ISR4321-SEC/K9
Product Overview The Cisco ISR4321-SEC/K9 is a security-enabled Integrated Services Router from the ISR 4000 Series, designed for small branch offices that require high-performance routing, secure WAN access, and modular expansion. This model includes the SEC license, enabling advanced security features like Zone-Based Firewall (ZBFW), IPsec VPN, SSL VPN, and control plane protection. With a base performance of 50 Mbps, upgradable to 100 Mbps, the ISR4321-SEC/K9 is ideal for secure branch connectivity, VPN deployment, and basic SD-WAN readiness.
Product Details
Specification
Description
Product Code
ISR4321-SEC/K9
Series
Cisco ISR 4000 Series
Form Factor
1RU rack-mountable
Base Performance
50 Mbps (upgradeable to 100 Mbps)
Built-in Interfaces
2 x 1G RJ45, Console, USB
NIM Slots
2 x Network Interface Module slots
SM Slots
None
DRAM
4 GB (expandable to 8 GB)
Flash Storage
4 GB (expandable)
Power Supply
Internal fixed AC
Software
Cisco IOS XE
Security License Features
ZBFW, IPsec VPN, SSL VPN, Control Plane Policing
SD-WAN Support
Yes (with SD-WAN image)
Application Visibility
Basic NetFlow/NBAR2
High Availability
Software-based (no dual PSU support)
Product Features
Includes Security (SEC) license for enterprise-grade firewall and VPN functions
Supports ZBFW, IPsec/SSL VPN, and dynamic routing protocols
Ideal for secure cloud connectivity, remote access, and branch perimeter defense
Modular platform with 2 NIM slots for WAN, 4G/LTE, or voice expansion
Powered by Cisco IOS XE, enabling automation, telemetry, and SD-WAN
Control plane protection and identity-based firewall for enhanced threat defense
Efficient, low-footprint 1RU form factor, optimized for small remote sites
Similar Models Comparison
Model
Security License
Max Performance
NIM/SM Slots
SD-WAN Ready
Form Factor
ISR4321-SEC/K9
Yes
100 Mbps
2 / 0
Yes
1RU
ISR4331-SEC/K9
Yes
300 Mbps
2 / 1
Yes
1RU
ISR4351-SEC/K9
Yes
400 Mbps
2 / 2
Yes
2RU
ISR4221-SEC/K9
Yes
35 Mbps
1 / 0
Yes
1RU
Latest ISR Security Models Comparison
Model
Performance Range
Key Security Features
Best Use Case
ISR4321-SEC/K9
50 – 100 Mbps
ZBFW, IPsec, SSL VPN
Secure small branch routing
ISR4331-SEC/K9
100 – 300 Mbps
Advanced security & SD-WAN
Medium branches needing strong defense
ISR4221-SEC/K9
Up to 35 Mbps
Entry-level security
Micro-branches with basic security
Sinanova specializes in supplying ICT networking equipment from leading brands such as Cisco, Huawei, and Juniper. Our product range includes switches, routers, firewalls, wireless access points and controllers, IP phones, video conferencing solutions, and more. We are committed to delivering original and reliable hardware along with professional ICT solutions—all at competitive prices. Our high-quality service ensures a smooth and hassle-free purchasing experience for our clients.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Distributor/Wholesaler,Exporter,Seller
Year Established:
2025
Total Annual:
50000-3000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Sinanova began as a domestic distributor of Cisco products and an ICT integrator. Over time, the company expanded its portfolio to include Huawei data communication equipment as well as networking solutions from Juniper and Fortinet.
Today, Sinanova specializes in providing a wide range of networ... Sinanova began as a domestic distributor of Cisco products and an ICT integrator. Over time, the company expanded its portfolio to include Huawei data communication equipment as well as networking solutions from Juniper and Fortinet.
Today, Sinanova specializes in providing a wide range of networ...
