WS-C3550-24-SMI Cisco 24 Ports Ethernet Switch
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WS-C3550-24-SMI Cisco Catalyst 24 Ports Ethernet Switch Refurbished

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Part Number#: WS-C3550-24-SMI
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Short Description:
WS-C3550-24-SMI Catalyst 3550 24 SMI Multilayer Manageable Switch with 24-Ports 10/100 Ports and 2 GBIC based Gigabit Twisted Pair Ethernet Ports SMI installed | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

More Information on Managed Switch

The Cisco WS-C3550-24-SMI is a versatile and manageable multilayer switch designed to cater to various networking needs. Featuring 24 ports supporting 10/100 Ethernet connections and 2 GBIC-based Gigabit Twisted Pair Ethernet ports, with SMI (Standard Multilayer Software Image) installed, this switch provides flexible connectivity options and efficient management capabilities for network infrastructures.

The WS-C3550-24-SMI (Cisco Catalyst 3550-24) is a managed Ethernet switch from Cisco Systems. It is designed for use in enterprise networks and is equipped with 24 10/100 Ethernet ports. The switch runs on Cisco IOS (Internetwork Operating System) software, which provides a wide range of features and capabilities, such as advanced security, Quality of Service (QoS), and link aggregation. It also supports advanced management features such as Simple Network Management Protocol (SNMP), allowing network administrators to monitor and control the switch remotely.

The switch also supports advanced security features such as access control lists (ACLs) and VLANs (Virtual Local Area Networks), which help to segment and isolate different parts of the network. Additionally, it supports Power over Ethernet (PoE) which can supply power to devices such as IP phones, cameras, and wireless access points. The product is a stackable switch which means it can be connected to other switches to increase the number of ports, and also allows for easy management of multiple switches as a single unit.

Understanding Multilayer Switches and Their Functions

Multilayer switches, like the Catalyst 3550, are sophisticated networking devices capable of routing data at both Layer 2 (Data Link layer) and Layer 3 (Network layer) of the OSI model. These switches offer advanced features for managing traffic, allowing for enhanced control and optimization of network performance.

Features of Cisco WS-C3550-24-SMI Catalyst 3550 Switch

24 Ports Supporting 10/100 Ethernet Connections

The switch offers 24 ports supporting Fast Ethernet (10/100), facilitating connections for multiple devices at moderate speeds.

2 GBIC-based Gigabit Twisted Pair Ethernet Ports

Additional Gigabit Ethernet ports using GBIC (Gigabit Interface Converter) modules for high-speed connectivity or uplink connections.

Standard Multilayer Software Image (SMI)

The SMI installed on the switch provides standard multilayer functionality, enabling advanced networking capabilities.

Importance of Multilayer Switches in Networking

Multilayer switches offer several advantages in networking environments:

Advanced Routing Capabilities

Multilayer switches can route traffic based on Layer 3 information, allowing for more efficient and intelligent routing decisions.

Enhanced Traffic Management

These switches provide Quality of Service (QoS) features for prioritizing critical traffic, ensuring optimal network performance.

Flexibility and Scalability

Multilayer switches support various network protocols and offer scalability to accommodate growing network requirements.

Benefits of Using Cisco WS-C3550-24-SMI Catalyst 3550 Switch

Diverse Connectivity Options

The combination of Fast Ethernet ports and Gigabit Ethernet ports offers flexible connectivity choices for different devices and network types.

Advanced Multilayer Functionality

The SMI installed on the switch provides advanced multilayer capabilities, enhancing its ability to manage network traffic efficiently.

Use Cases for Cisco WS-C3550-24-SMI Catalyst 3550 Switch

Office Networks

Ideal for office environments where a mix of Fast Ethernet and Gigabit Ethernet connections is required for various devices.

Small to Medium-Sized Businesses (SMBs)

Suited for SMBs needing a manageable switch with advanced routing capabilities and flexible connectivity options.

Network Upgrades

Useful for upgrading existing networks to support higher-speed Gigabit Ethernet connections while maintaining compatibility with legacy devices.

High Performance for Cisco 24 Ports Switch

The WS-C3550-24-SMI is a Cisco Catalyst switch that offers 24 10/100 Ethernet ports and supports advanced features such as Quality of Service (QoS), advanced security, and Power over Ethernet (PoE). It is designed for use in small to medium-sized enterprise networks and can provide a high level of performance and functionality.

The switch supports non-blocking wire-speed performance on all ports and it has a switching capacity of 8 Gbps. It also supports advanced features such as layer 3 routing, VLANs, and network-wide security. Additionally, it can prioritize delay-sensitive traffic such as voice and video, and provide power to devices such as IP phones and wireless access points over Ethernet cables.

Exceptional Reliability

The Cisco WS-C3550-24-SMI Catalyst is a managed Ethernet switch that is designed for use in enterprise networks. It is generally considered to be a reliable device, with several features that help to ensure its stability and performance. Some of these features include advanced security features, Quality of Service (QoS) support, and support for high-speed Gigabit Ethernet connections.

The switch also has a feature set that provides advanced security, reliability, and performance, with features such as:

  • Advanced Quality of Service (QoS)
  • Access Control Lists (ACLs)
  • Advanced security features such as IEEE 802.1x port-based authentication
  • IP routing capabilities
  • Stackable design for easy scalability

General Information about WS-C3550-24-SMI

  • Manufacturer: Cisco
  • Model Number or SKU# WS-C3550-24-SMI
  • Product Line: Catalyst
  • Product Series: 3550
  • Product Name: Catalyst WS-C3550-24-SMI Ethernet Switch
  • Product Type: Ethernet Switch

Interfaces/Ports for 24 Ports Ethernet Switch

  • Total Number of Network Ports 24
  • Port/Expansion Slot Details 24 x Fast Ethernet Network
  • 2 x Gigabit Ethernet Expansion Slot

Performance of Catalyst C3550 Managed Switch

  • Media Type Supported Twisted Pair
  • Ethernet Technology Fast Ethernet
  • Network Technology 10Base-T
  • 10/100Base-TX

I/O Expansions:

  • Number of Total Expansion Slots 2
  • Expansion Slot Type GBIC

Management & Protocols

  • Manageable Yes

In summary, the Cisco WS-C3550-24-SMI Catalyst 3550 Switch, featuring 24 Fast Ethernet ports, 2 Gigabit Ethernet ports using GBIC modules, and SMI installed, stands as a versatile and manageable networking solution. Its diverse connectivity options, multilayer functionality, and suitability for various applications, including office networks, SMBs, and network upgrades, make it a valuable component in network infrastructures. Cisco's commitment to providing feature-rich and scalable networking solutions positions the Catalyst 3550 as an essential switch for efficient and adaptable network management.

Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

About Refurbished Products

Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.


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ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
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