ISR4321-SEC/K9
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Cisco ISR4321-SEC/K9 Integrated Services Router

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ISR4321-SEC/K9 Overview

Cisco

ISR4321-SEC/K9 is the Cisco ISR4321/k9 router with Security Bundle. Its other specifications are the same as ISR4321/k9.

Quick Specs

 

Table 1 shows the Quick Specs.

Product Code Cisco

ISR4321-SEC/K9
Bundle Security Bundle
Aggregate Throughput 50 Mbps to 100 Mbps
Total onboard WAN or LAN 10/100/1000 ports 2
RJ-45-based ports 2
SFP-based ports 1
NIM (Network Interface Modules) slots 2
Onboard ISC slot 1
Memory 4 GB (default) / 8 GB (maximum)
Flash Memory 4 GB (default) / 8 GB (maximum)
Power-supply options External: AC and PoE
Rack height 1 RU
Dimensions (H x W x D) 44.55 mm x 369.57 mm x 294.64 mm
Package Weight 9.19 Kg

 

· There are eight LEDs on the front panel: POE0, FLASH, TEMP, PWR, SSD, ISC, FAN, and STAT

① Grounding ⑦ GE 0/0/1 (copper cable) port
② Power switch ⑧ GE 0/0/0 SFP (fiber-optic) port
③ Power input connector ⑨ NIM slots
④ GE “MGMT” port (with USB port below) ⑩ GE 0/0/0 RJ-45 (copper cable) port
⑤ USB Type B mini port Auxiliary port
⑥ Console port
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Type Cisco ISR4321/K9 with Security Bundle
Aggregate Throughput 50 Mbps to 100 Mbps
Total onboard WAN or LAN 10/100/1000 ports 2
RJ-45-based ports 2
SFP-based ports 1
Enhanced service-module slots 0
Doublewide service-module slots 0
NIM slots 2
OIR (all I/O modules) Yes
Onboard ISC slot 1
Default memory double-data-rate 3 (DDR3) error-correction-code (ECC) DRAM (Combined control/services/data planes) 4 GB
Maximum memory DDR3 ECC DRAM (Combined control/services/data planes) 8 GB
Default memory DDR3 ECC DRAM (data plane) NA
Maximum memory DDR3 ECC DRAM (data plane) NA
Default memory DDR3 ECC DRAM (control/services plane) NA
Maximum memory DDR3 ECC DRAM (control/services plane) NA
Default flash memory 4 GB
Maximum flash memory 8 GB
External USB 2.0 slots (type A) 1
USB console port -type B mini (up to 115.2 kbps) 1
Serial console port - RJ45 (up to 115.2 kbps) 1
Serial auxiliary port - RJ45 (up to 115.2 kbps) 1
Power-supply options External: AC and PoE
Redundant power supply N/A
AC input voltage 100 to 240 VAC autoranging
AC input frequency 47 to 63 Hz
AC input current range, AC power supply (maximum) 1.5 to 0.6A
AC input surge current 90 A peak and less than 3 Arms per half cycle
Typical power (no modules) (watts) 36
Maximum power with AC power supply (watts) 125
Maximum power with PoE power supply (platform only) (watts) 260
Maximum endpoint PoE power available from PoE power supply (watts) 120

Frequently Asked Questions

What is Cisco ISR4321-SEC/K9?

The ISR4321-SEC/K9 is a Cisco 4000 Series Integrated Services Router that comes with the Security Bundle (SEC/K9). It is designed for secure branch networking and includes enterprise security capabilities such as VPN, firewall functions, and encrypted WAN connectivity. It is commonly used in small to medium enterprise branch offices.

Is ISR4321-SEC/K9 suitable for secure branch offices?

Yes. The ISR4321-SEC/K9 is specifically designed for branch offices requiring secure connectivity, VPN access, and integrated routing. It combines routing and security in one appliance, making it a common choice for enterprise branch deployments.

What is the throughput of Cisco ISR4321-SEC/K9?

The router supports 50 Mbps to 100 Mbps aggregate throughput, depending on licensing and configuration. This performance level makes it suitable for small to medium branch environments with secure WAN traffic requirements.

What does “SEC/K9” mean in ISR4321-SEC/K9?

SEC/K9” indicates that the router includes Cisco’s Security Bundle license, which enables features like IPsec VPN, zone-based firewall, and advanced WAN security capabilities. This bundle allows organizations to deploy secure WAN connections without purchasing separate security licensing.

Does ISR4321-SEC/K9 support VPN and firewall features?

Yes. The Security Bundle includes support for enterprise security features such as: IPsec VPN Zone-based firewall Secure WAN encryption NAT and threat protection options These features allow secure site-to-site and remote connectivity.

Where can I buy genuine ISR4321-SEC/K9 in the UAE & KSA?

You can purchase genuine Cisco ISR4321-SEC/K9 routers from trusted enterprise IT suppliers like Netseg, offering: Fast delivery to UAE & KSA Genuine Cisco hardware Enterprise consultation Professional technical support

Is ISR4321-SEC/K9 a good option for small or medium businesses?

Yes. It is widely used by SMBs and enterprise branches because it combines: Secure routing Modular expansion Enterprise-grade Cisco IOS XE features Compact 1RU deployment This makes it a cost-effective, secure WAN router.

Can ISR4321-SEC/K9 be used for cloud and hybrid networking?

Yes. With secure VPN and SD-WAN capability, ISR4321-SEC/K9 can securely connect branch offices to cloud services, SaaS platforms, and hybrid data center environments.

Why is ISR4321-SEC/K9 still frequently searched online?

The model remains popular because: Many enterprises still deploy ISR 4000 routers Security bundle reduces licensing complexity It supports SD-WAN upgrades Strong reputation for stability in branch networks These factors keep demand and search volume high.

What ports and interfaces are available on ISR4321-SEC/K9?

Typical interfaces include: 2 × Gigabit Ethernet RJ-45 ports 1 × SFP port 2 × NIM expansion slots Management and console ports This modular design allows flexible WAN and LAN expansion for branch deployments.

Is ISR4321-SEC/K9 SD-WAN ready?

Yes. The ISR4321 platform can run Cisco IOS XE SD-WAN, enabling centralized policy control, application-aware routing, and secure WAN orchestration for distributed enterprise networks.

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