Cisco SF250-48-K9-NA 48 Port Networking Switch
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SF250-48-K9-NA Cisco 250 Series 48 Ethernet Ports Layer 2 Refurbished

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Part Number#: SF250-48-K9-NA
List Price was: $1338.46
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Short Description:
SF250-48-K9-NA 250 Series 48 Ethernet Ports & 2 Ethernet Ports & 2 Combo Gigabit SFP Ports & 2 Gigabit SFP Ports Twisted Pair & Optical Fiber Layer 2 Rack-mountable Managed Switch | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

Advanced Features

The SF250-48-K9-NA Cisco 250 Series switch is a rack-mountable, managed switch with 48 Ethernet ports. It supports Layer 2 switching and has a variety of advanced features to help manage and secure your network. Some of the key features include:

  • Virtual LANs (VLANs): This feature allows you to segment your network into different logical segments, creating separate broadcast domains and improving network security. It also helps to reduce congestion and improve performance.
  • Quality of Service (QoS): QoS allows you to prioritize different types of traffic, such as voice or video, to ensure that critical applications receive the bandwidth they need to function properly.
  • Link Aggregation Control Protocol (LACP): This protocol allows you to bundle multiple Ethernet ports together to form a single, high-bandwidth link. This can help to increase the available bandwidth and improve network redundancy.
  • Spanning Tree Protocol (STP): STP helps to prevent loops in the network by automatically disabling certain links. This ensures that there is always a single active path between any two devices, preventing network congestion and improving network stability.
  • Port mirroring: This feature allows you to monitor network traffic by copying all packets that pass through a specific port and sending them to another port for monitoring or analysis.
  • Simple Network Management Protocol (SNMP): SNMP is a widely-used protocol for managing and monitoring network devices. The switch supports SNMP, allowing you to easily monitor and manage the device from a central location.
  • DHCP snooping: This feature helps to protect against rogue DHCP servers by filtering DHCP messages and only allowing messages from authorized DHCP servers to be processed.
  • Access control lists (ACLs): ACLs allow you to control network access by specifying which devices or users are allowed to access specific parts of the network. This can be used to implement security policies and improve network security.
  • Web-based management interface: The switch has a web-based management interface that allows you to easily configure and monitor the device from any location with a web browser.

These advanced features make SF250-48-K9-NA Cisco 250 Series switch a reliable and secure option for small and medium-sized businesses, as well as for branch offices and enterprise environments.

Efficient and Scalable Networking

"Efficient" in this context refers to the switch's ability to efficiently manage network traffic and resources, such as bandwidth and power consumption. The SF250-48-K9-NA has features such as Quality of Service (QoS), which allows you to prioritize certain types of traffic, such as voice or video, to ensure that they receive the necessary bandwidth. The switch also supports Cisco EnergyWise technology, which helps to reduce energy consumption by monitoring and controlling the power usage of connected devices.

"Scalable" refers to the switch's ability to adapt to the changing needs of your network. The SF250-48-K9-NA has 48 Ethernet ports, which allows you to connect a large number of devices to the switch. Additionally, the switch supports link aggregation, which allows you to combine multiple ports to increase bandwidth and provide redundancy. The switch also supports VLANs, which allow you to segment your network into different virtual networks, providing added security and reducing broadcast traffic.

Quality of Service

Quality of Service (QoS) is a feature of the SF250-48-K9-NA Cisco 250 Series Switch that allows you to prioritize certain types of network traffic, such as voice or video, to ensure that they receive the necessary bandwidth. This is important because some types of traffic, such as video or voice, are more sensitive to delays or jitter than other types of traffic, such as email or file transfers.

The SF250-48-K9-NA supports a variety of QoS features, including:

  • Class of Service (CoS): This feature allows you to assign priority levels to different types of traffic, such as real-time traffic, based on the 802.1p priority tag.
  • Differentiated Services Code Point (DSCP): This feature allows you to assign priority levels to different types of traffic based on the Differentiated Services Code Point (DSCP) value in the IP header.
  • Quality of Service (QoS) policies: This feature allows you to create policies that control the prioritization of traffic based on a variety of criteria, such as source and destination IP addresses, protocols, and ports.
  • Link Aggregation Control Protocol (LACP): LACP allows you to bundle multiple physical interfaces into a single logical interface, providing increased bandwidth and redundancy.

By using these features, the SF250-48-K9-NA ensures that sensitive traffic is prioritized and guaranteed the necessary bandwidth for optimal performance. This improves the overall user experience and satisfaction, especially for real-time applications such as video conferencing or VoIP.

General Information:

Manufacturer Cisco Systems, Inc

Manufacturer Part Number SF250-48-K9-NA

Brand Name Cisco

Product Series 250

Product Model SF250-48

Product Name SF250-48 48-Port 10 100 Smart Switch

Product Type Ethernet Switch


Total Number of Network Ports 48

Uplink Port Yes

Modular Yes

Stack Port No

Port/Expansion Slot Details 2 x Gigabit Ethernet Expansion Slot

Port/Expansion Slot Details 2 x Gigabit Ethernet Network

Port/Expansion Slot Details 48 x Fast Ethernet Network

Media & Performance

Media Type Supported Twisted Pair

Media Type Supported Optical Fiber

Ethernet Technology Fast Ethernet

Ethernet Technology Gigabit Ethernet

Network Technology 10/100Base-TX

Network Technology 10/100/1000Base-TX

Network Technology 1000Base-X

I/O Expansions

Number of Total Expansion Slots 2

Expansion Slot Type SFP

Shared SFP Slot Yes

Number of SFP Slots 2

Network & Communication

Layer Supported 2

Management & Protocols

Manageable Yes

Power Description

Power Source Power Supply

Redundant Power Supply Supported No


Package Contents-

SF250-48 48-Port 10 100 Smart Switch

Power Cord

Mounting Kit

Quick Start Guide

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.

Different Types of Switches

Networking switches vary widely depending on the number of devices they can support, network bandwidth/speed, and form factor. Switches for small offices will have anything between 4 and 8 ports and can fit on a desk. For larger office network implementation, switches may have 24 ports, 48 ports, 96 ports, and 128 ports and are rack-mountable between 1U and 4U. Switches come in different types depending on the network speed and tasks they support. These include 40/100 Gbps, 10 Gigabit (up to 10000 Mbps), Gigabit Ethernet (up to 1000 Mbps), Power over Ethernet, and Fast Ethernet (10/100 Mbps).

Unmanaged Switches

The unmanaged switches offer fixed configurations on a plug-and-play basis. It is the most basic switch and there are a few choices in the market. These switches are affordable, but the basic features make them inappropriate for enterprise applications.

Managed Switches

The number of features and level of functionality improves with managed switches, making them ideal for enterprise and business applications. These switches are built with the command-line interface for ease of configuration. Equally, they support SNMP agents that come in handy when troubleshooting network issues.

The security on managed switches is better and will protect different types of traffic. Other features include support for virtual LANs, IP routing, and quality of service settings. Managed switches are more expensive compared to all other types of switches.

Smart Switches

Smart switches refer to switches that possess more features than those unmanaged switches but do not have the full features of managed switches. Smart switches are more cost-effective than managed switches.

Some of the limitations of the smart switches are a lack of telnet access support, Web GUIs, and a lack of many features for VLANs. They are affordable compared to a fully managed switch and are suitable for a smaller computer network.

Modular Switches

Modular switches allow the addition of expansion modules as the network expands. The expansion modules allow for more networked devices but are application-specific. They may include wireless access points, firewalls, or network analysis tools. The flexibility of a modular networking switch comes at a higher cost.

Here, you can check more available conditions of your desired product SF250-48-K9-NA at a competitive price. We are trying our best to meet your needs on the enterprise-level computer, server, data centre, and networking hardware. You are welcome to ask our live chat or get live representative support over the phone.


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What does ALLHDD.Com warranty cover?

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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).

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