ISR4331-AX/K9
Roll over image to zoom in
Click to open expanded view

Cisco ISR4351/K9 Integrated Services Router

Call for Price

Call For Price

Availability: In stock

Get A Quote
Categories: , , Brand:

Warranty : Warranty Icon

Shipping : Shipping Icon Fast & Secure

Payments : Payment Methods

Certification : Certifications

ISR4351/K9 Overview

Cisco 4351 Integrated Services Router, which supports 3 Network Interface Modules (NIM) slots, delivers 200 Mbps to 400 Mbps aggregate throughput.

Quick Specs

Table 1 shows the Quick Specs.

Product Code Cisco

ISR4351/K9
Aggregate Throughput 200 Mbps to 400 Mbps
Total onboard WAN or LAN 10/100/1000 ports 3
RJ-45-based ports 3
SFP-based ports 3
Enhanced service-module (SM-X) slot 2
NIM (Network Interface Modules) slots 3
Onboard ISC slot 1
Memory 4 GB (default) / 16 GB (maximum)
Flash Memory 4 GB (default) / 16 GB (maximum)
Power-supply options Internal: AC, DC (roadmap), and PoE
Rack height 2 RU
Dimensions (H x W x D) 43.9 x 438.15 x 507.2 mm

Table 2 shows the LED descriptions.

LEDs Represents Color Description
PSU0 Power Supply Unit (P0 and P1) Status Green PSU is on and is providing power.
Amber PSU is on but with errors or in a failure condition.
Off Power supply is turned off.
POE0 POE PSU Green PoE is on and providing power.
Amber PoE is in a failed condition.
Off PoE supply is not present.
GE POE Internal PoE Daughter Card Status Green PSU is installed and providing power
Amber PSU is installed but in a failure condition.
Off PSU is off.
FLASH System Flash Status Blinking Green Compact flash/eUSB flash is present and currently being accessed.
TEMP Temperature Status Solid green All temperature sensors in the system are within acceptable range.
Amber One or more temperature sensors in the system are outside the acceptable range.
Off Temperature is not being monitored.
PWR System Power Green System power is on and functioning correctly.
Green blinking System power is in the process of shutting down.
Amber System power is up, but low level initialization failed.
Amber blinking System power is up, but the system failed to come out of reset.
Off System power is off.
SSD mSATA Slot Status Green SSD mSATA is present and enabled.
Amber Initialized with error.
Off Not present.
ISC ISC Slot Status Green PVDM4 is present and enabled.
Amber Initialized with error.
Off Not present.
FAN Fan Status Green All fans are operating.
Amber One fan has stopped working.
Blinking Amber Two or more fans have stopped working, or the fan tray has been removed.
Off Fans are not being monitored.
STAT System Status Solid green System operating normally.
Blinking amber BIOS/Rommon is booting.
Amber BIOS/Rommon has completed booting, and system is at Rommon prompt or booting platform software.
Off System is not out of reset or BIOS image is not loadable.
Be the first to review “Cisco ISR4351/K9 Integrated Services Router”

Your email address will not be published. Required fields are marked *

Reviews

There are no reviews yet.

Customer Reviews

(0)
5 stars
4 stars
3 stars
2 stars
1 stars

No reviews yet.

×

Write a Review

☆ ☆ ☆ ☆ ☆

Aggregate Throughput 200 Mbps to 400 Mbps
Total onboard WAN or LAN 10/100/1000 ports 3
RJ-45-based ports 3
SFP-based ports 3
Enhanced service-module slots 2
Doublewide service-module slots 1 (assumes no singlewide SM-X modules installed)
NIM slots 3
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) 16 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 16 GB
External USB 2.0 slots (type A) 2
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 Internal: AC, DC, 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) 7.1 to 3.0A
AC input surge current 60 A peak and less than 12 Arms per half cycle
Typical power (no modules) (watts) 48
Maximum power with AC power supply (watts) 430
Maximum power with PoE power supply (platform only) (watts) 990
Maximum endpoint PoE power available from PoE power supply (watts) 500

Frequently Asked Questions

What is Cisco ISR4351/K9?

The Cisco ISR4351/K9 is an enterprise-grade Integrated Services Router from the Cisco 4000 Series, designed for secure branch networking, WAN edge routing, and scalable enterprise connectivity. It supports modular expansion, advanced routing services, and enterprise security integration for medium to large branch offices.

What is the Cisco ISR4351/K9 mainly used for?

The ISR4351/K9 is commonly used for: Enterprise branch WAN routing MPLS and Internet edge connectivity Secure VPN connectivity Hybrid cloud networking Application-aware routing It is widely deployed in branch environments requiring reliable and scalable enterprise performance.

What is the throughput of Cisco ISR4351/K9?

The ISR4351/K9 provides 200 Mbps base throughput, which can be upgraded through performance licensing to handle higher enterprise traffic demands. This flexibility makes it popular among organizations scaling branch network capacity.

Does ISR4351/K9 support SD-WAN?

Yes. The ISR4351 platform supports Cisco IOS XE SD-WAN, allowing centralized management, application-aware routing, and secure branch connectivity. This is one of the main reasons the model remains highly searched by enterprise IT buyers.

Is ISR4351/K9 suitable for enterprise branch offices?

Yes. It is specifically designed for enterprise branch deployments because it offers: High reliability Modular expansion slots Secure WAN connectivity Advanced routing capabilities It is commonly used in medium and large branch networks.

What is the difference between ISR4351/K9 and ISR4351-SEC/K9?

The main difference is licensing: ISR4351/K9 → Base hardware with standard features ISR4351-SEC/K9 → Includes security bundle (VPN and advanced security features) Organizations needing built-in enterprise security usually choose the SEC bundle version.

Can ISR4351/K9 be used for cloud and hybrid networking?

Yes. With SD-WAN capabilities and secure WAN features, ISR4351/K9 can connect enterprise branches securely to cloud environments, SaaS platforms, and hybrid data center infrastructures.

Is ISR4351/K9 a future-proof enterprise router?

While the ISR4000 Series is in lifecycle transition, many enterprises still use ISR4351/K9 due to its reliability, SD-WAN support, and compatibility with existing Cisco infrastructure — making it relevant for upgrade and migration strategies.

How is ISR4351/K9 different from ISR4331 or ISR4431?

Key differences include: ISR4331: Lower performance and smaller branch deployments ISR4351: Mid-range performance with scalability ISR4431: Higher throughput for large enterprise branches This makes ISR4351 an ideal balance between performance and cost.

Is Cisco ISR4351/K9 still widely used and searched?

Yes. The ISR4351/K9 remains popular because: Many enterprises still run ISR 4000 infrastructure Strong compatibility with Cisco enterprise networks Supports SD-WAN upgrades Reliable branch performance These factors keep online search demand high.

What ports and interfaces are available on ISR4351/K9?

Typical interfaces include: 3 × Gigabit Ethernet ports 2 × Network Interface Module (NIM) slots Enhanced service module support USB and management interfaces This modular design allows flexibility for WAN expansion and additional services.

Related products

Categories