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by Cisco
Product Line: Cisco 4000 Series
Product Type: Integrated Services Router
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Original price $0.00 - Original price $0.00
Original price
$0.00 - $0.00
Current price $0.00
Title: Surplus

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Product Description

The ISR4331/K9 Cisco router offers an aggregate throughput of 100 Mbps, scalable to 300 Mbps with a performance license, and a CEF only throughput exceeding 3 Gbps. It includes three 10/100/1000 ports, two NIM slots, and one each of RJ-45 and SFP ports, supporting a diverse range of connectivity options. With 4 GB DDR3 RAM, expandable to 16 GB, and dual power supply options (AC, DC, and PoE), it delivers reliable service across various operational environments.

FAQs for the ISR4331/K9

  • What is the default aggregate throughput of the device?
    The default aggregate throughput is 100 Mbps.
  • How many total onboard WAN or LAN 10/100/1000 ports does the device offer?
    It offers 3 total onboard WAN or LAN 10/100/1000 ports.
  • Can the aggregate throughput be increased, and if so, to what extent?
    Yes, the aggregate throughput can be increased to 300 Mbps with a Performance License.
  • What types and how many RJ-45 and SFP ports are available?
    There are 2 RJ-45 ports and 1 SFP port available.
  • What is the maximum memory capacity of the device?
    The maximum memory capacity is 16 GB DDR3 RAM.
  • Does the device support Online Insertion and Removal (OIR)?
    Yes, OIR support is available.
  • What are the power supply options for the device?
    Power supply options include internal AC, DC, and PoE.
  • How many external USB 2.0 Type A slots are there?
    There are 2 external USB 2.0 Type A slots.
  • What is the device's operating temperature range?
    The operating temperature range is 0 °C to 40 °C.
  • What are the dimensions and rack height of the device?
    The dimensions are 3.5 x 17.25 x 18.5 inches, and it has a rack height of 1 RU.

Product Review

The Cisco ISR4331/K9 offers a scalable throughput from 100 Mbps to 300 Mbps with a performance license, catering to varying network demands. However, its initial default memory and flash memory of 4 GB, expandable to 16 GB, may limit advanced applications and extensive data operations. It supports a wide range of power supply options including AC, DC, and PoE, alongside versatile connectivity with three 10/100/1000 ports, SFP ports, and NIM slots, yet lacks enhanced service module slots for further expansion.


The Cisco ISR4331/K9 is a versatile integrated services router designed to deliver advanced services to small to medium-sized enterprises and branch offices. It comes equipped with significant capabilities in terms of throughput, scalability, and security, making it a suitable choice for a wide range of networking requirements. The ISR4331/K9 offers a default aggregate throughput of 100 Mbps, which can be increased to 300 Mbps with a performance license. This scalability ensures that the router can meet the evolving demands of business networks. Additionally, it supports Class of Service (CEF) only throughput of over 3 Gbps, highlighting its efficiency in handling data packets. This router features a comprehensive set of ports and interfaces to accommodate various network configurations and expansions. It includes three onboard WAN or LAN 10/100/1000 ports, providing flexibility in connectivity. Of these, two are RJ-45 ports, and one is an SFP port, allowing for both copper and fiber connections. The ISR4331/K9 is designed to support future growth with two Network Interface Module (NIM) slots, enabling the addition of voice, video, data, and security services. It also includes one onboard ISC slot for further expansion.
  • OIR (Online Insertion and Removal) support ensures minimal disruption during module changes.
  • The router comes with 4 GB of DDR3 RAM by default, which can be expanded up to 16 GB to improve performance and support more complex operations.
  • For storage, it starts with 4 GB of flash memory, upgradable to 16 GB, providing ample space for IOS and other software.
External connectivity options are robust, with two USB 2.0 Type A slots for storage and backup purposes, and one USB Type B Mini slot for console management. Additionally, the router features one serial console port and one serial auxiliary port, catering to a variety of management and configuration needs. The Cisco ISR4331/K9 is designed with power supply versatility in mind, supporting internal AC, DC, and PoE options. This flexibility ensures that the router can be deployed in diverse environments without the need for additional power converters. The AC input voltage range of 100 to 240 VAC makes it suitable for global use. Despite its capabilities, the router maintains a typical power consumption of only 65 W, underscoring its efficiency. With dimensions of 3.5 x 17.25 x 18.5 inches and a rack height of 1 RU, the ISR4331/K9 is compact enough for deployment in space-constrained environments while still delivering the performance expected from Cisco's ISR series. It operates within a temperature range of 0 °C to 40 °C, ensuring reliability in a variety of climatic conditions. In summary, the Cisco ISR4331/K9 integrates powerful networking capabilities into a compact, scalable, and efficient package. Its combination of throughput scalability, diverse connectivity options, and expansion capabilities make it an ideal solution for businesses looking to secure, scale, and streamline their network infrastructure.


Model NumberISR4331/K9
Base Throughput100 Mbps
Throughput with Performance License300 Mbps
CEF-Only Throughput CapacityAbove 3 Gbps
Integrated WAN/LAN Ports3
Ethernet Ports (RJ-45)2
Small Form-Factor Pluggable (SFP) Ports1
Enhanced Service Module (ESM) Slots0
Service Module Slots for Doublewide0
Network Interface Module (NIM) Slots2
Online Insertion and Removal (OIR)Supported
Internal Service Card (ISC) Slot1
RAM (Standard)4 GB DDR3
RAM (Maximum)16 GB DDR3
Flash Memory (Standard)4 GB
Flash Memory (Maximum)16 GB
USB 2.0 Ports (Type A)2
USB Mini-Type B Ports1
Management Console Port1
Auxiliary Port1
Power Supply VariantsAC, DC, PoE (Internal)
AC Power Input100 to 240 VAC
Power Consumption (Typical)65 W
Dimensions (H x W x D)3.5 x 17.25 x 18.5 inches
Operational Temperature Range0 °C to 40 °C
Rack Units (RU)1

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