Cisco C9300LM-48UX-4Y Switch

The Cisco C9300LM-48UX-4Y Switch is an enterprise-class managed access switch designed for organizations that need high-density connectivity, advanced Power over Ethernet, multigigabit access, and high-speed fiber uplinks in a compact rack-mountable platform. As part of the Cisco Catalyst 9300LM family, this switch combines 48 copper access ports, eight multigigabit ports supporting speeds up to 10 Gbps, and four fixed 25G uplinks to support demanding enterprise network environments.

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For businesses upgrading their wired infrastructure, the C9300LM-48UX-4Y offers a practical way to connect conventional Ethernet devices alongside high-performance wireless access points and other bandwidth-intensive endpoints. Cisco UPOE support across its access ports helps compatible devices receive both power and data over a single Ethernet cable, reducing the need for separate power adapters and simplifying network deployment.

Explore our networking equipment store to compare enterprise switches, access-layer solutions, and connectivity products for business networks. You can also read our guide, What Is a Cisco Switch?, for an introduction to switching technologies and their role in modern IT infrastructure.

Cisco Catalyst C9300LM-48UX-4Y Switch Overview

The Cisco C9300LM-48UX-4Y is designed for enterprise access networks where port density, flexible endpoint connectivity, and uplink capacity are important purchasing considerations. Its port configuration combines standard Gigabit Ethernet access with multigigabit connectivity, allowing network administrators to connect a diverse range of devices without requiring a separate switch for each speed category.

The model provides 40 copper ports supporting 10/100/1000 Mbps Ethernet and eight multigigabit copper ports supporting 100 Mbps, 1 Gbps, 2.5 Gbps, 5 Gbps, and 10 Gbps. It also includes four fixed 25 Gigabit Ethernet SFP28 uplinks. This combination makes the switch suitable for access-layer deployments that need fast connections to distribution switches, core infrastructure, or other supported aggregation platforms.

Key Product Highlights

• 48 copper access ports: Connect computers, printers, IP phones, wireless access points, and other Ethernet-enabled endpoints.
• Eight multigigabit ports: Support compatible devices requiring higher access speeds, including selected enterprise wireless access points.
• 40 Gigabit Ethernet ports: Provide conventional 10/100/1000 Mbps connectivity for standard business devices.
• Cisco UPOE: Supplies power to compatible powered devices, subject to port limits, device requirements, and the available power budget.
• Four fixed 25G uplinks: Provide high-speed fiber connectivity toward the wider network.
• StackWise-320: Supports stacking for compatible Catalyst 9300LM deployments.
• Compact chassis: Offers a shallow-depth design suited to rack environments where equipment depth is an important consideration.

Cisco C9300LM-48UX-4Y Technical Specifications

Review the following specification summary before selecting this switch for an enterprise network upgrade. Final purchasing decisions should also account for the software license, power configuration, optical transceivers, cabling, and accessories required by the intended deployment.

Important: The available PoE budget depends on the power supply configuration and other hardware limitations. The maximum rating is not the same as the power available to every port simultaneously. Confirm the exact hardware SKU, license, power supply, and supported feature set with the supplier before ordering.

High-Performance Multigigabit Ethernet Connectivity

Modern enterprise networks increasingly need more than standard Gigabit Ethernet at the access layer. Wireless access points, high-performance workstations, network appliances, and selected specialist devices can benefit from multigigabit connections. The C9300LM-48UX-4Y addresses this requirement by integrating eight multigigabit ports into a 48-port access switch.

Eight 10G Multigigabit Ports

The eight multigigabit ports support multiple Ethernet speeds, allowing compatible endpoints to negotiate an appropriate connection rate. This flexibility can help organizations improve wired performance without immediately replacing all existing Ethernet infrastructure. When planning 10GBASE-T connections, use suitable cabling, such as Category 6A or Category 7, in accordance with the installation requirements and channel length.

The remaining 40 Gigabit Ethernet ports provide connectivity for conventional business devices. This mixed-speed configuration is useful for organizations that need a limited number of high-bandwidth access connections while retaining extensive support for standard Ethernet endpoints.

Businesses considering other Catalyst platforms can compare the Cisco Catalyst C9300X-12Y-E, C9300X-24Y-E, and C9300X-48HX to evaluate different high-speed port configurations and deployment requirements.

Four Fixed 25G Uplinks for Enterprise Network Expansion

The four fixed 25G SFP28 uplinks provide a high-speed connection between the access switch and compatible upstream network equipment. Higher-speed uplinks can help reduce the risk of oversubscribed connections when many active endpoints communicate with centralized applications, shared storage, or services hosted in a data center.

Network planners should select supported SFP28 transceivers, fiber types, connector configurations, and cable lengths for their intended links. Compatibility with the upstream switch and the selected optical module must be checked before installation. The presence of four 25G uplinks does not mean that every connected endpoint receives a dedicated 25 Gbps connection.

For alternative access and aggregation configurations, consider the Cisco Catalyst C9300-48U, Cisco Catalyst C9300-48UXM, and Cisco Catalyst C9500-48Y4C-E. These models belong to different configurations and should be evaluated against the required port speeds, uplink architecture, and network role rather than treated as direct equivalents.

Cisco UPOE and Enterprise Power Delivery

Power over Ethernet is an important consideration for businesses deploying wireless access points, IP phones, cameras, and other compatible network devices. Cisco UPOE enables supported endpoints to receive power and network connectivity over a single Ethernet cable. This can simplify installations, reduce the number of separate power connections, and make it easier to centralize power management within the network rack.

Powering Wireless Access Points and IP Phones

The C9300LM-48UX-4Y is particularly relevant where a network includes a combination of standard Ethernet devices and higher-performance access points. Its UPOE capability supports compatible devices within the electrical limits of the switch and the applicable PoE standards. Actual device support depends on the endpoint power requirement, cable installation, port configuration, and total switch power budget.

For organizations standardizing their voice infrastructure, related products include the Cisco IP Phone CP-8851-K9, Cisco IP Phone CP-8861-K9, Cisco IP Phone CP-8841-K9, and Cisco IP Phone CP-7841-K9. Check each phone’s power requirements and network compatibility before including it in a deployment.

Enterprise Applications and Deployment Scenarios

Corporate Offices and Campus Networks

In corporate offices, the switch can serve as an access-layer platform for employee workstations, printers, IP phones, wireless access points, and shared network resources. Its 48-port configuration helps consolidate numerous connections into a single managed device, while multigigabit access supports selected endpoints that need more bandwidth than conventional Gigabit Ethernet provides.

High-Density Wireless Environments

Businesses upgrading wireless infrastructure may need higher-speed Ethernet links to compatible access points. The eight multigigabit ports offer a practical option for connecting selected high-throughput wireless devices, while the other ports continue to serve standard wired endpoints. This can help organizations plan phased wireless upgrades without replacing the entire access layer at once.

Retail, Hospitality, and Distributed Sites

Retail branches, hospitality properties, and distributed offices often combine employee devices, voice systems, wireless access, and operational equipment. A managed switch can provide a centralized point for configuring network access and connecting these device categories. The suitability of this model depends on local power requirements, rack depth, environmental conditions, licensing, and the site’s upstream network capacity.

Secure and Scalable Network Infrastructure

The Catalyst 9300 family is designed for enterprise networking and supports software-dependent management and security capabilities across its supported configurations. Available functions can vary by software release, license tier, and deployment mode. IT teams should verify the features required for their network before selecting the final software entitlement.

To understand the wider product range, review the Catalyst C9300-24T, Catalyst C9300-48T, Catalyst C9300-24P, and Catalyst C9300-48P.

Cisco Catalyst C9300LM-48UX-4Y vs. Other Catalyst Switches

Choosing the right switch involves more than comparing port counts. Organizations should consider multigigabit availability, PoE requirements, uplink speed, chassis depth, stacking, and the total cost of the required configuration. The following table summarizes key differences between selected models listed in the Nexoget catalog.

Explore the alternative Cisco Catalyst C9300LM-48T-4X, C9300L-48T-4X, C9300L-48P-4X, and C9300L-48PF-4X to compare different port and power configurations. Note that these products are not identical to the C9300LM-48UX-4Y, and their feature sets should be checked independently.

Additional Catalyst Models for Network Planning

Organizations evaluating an enterprise refresh may also need switches for smaller access closets, conventional Gigabit connectivity, or other uplink requirements. The following related product pages can help build a shortlist based on the number of endpoints and required network speeds.

• Cisco Catalyst C9300L-24T-4X for a 24-port data-only access configuration.
• Cisco Catalyst C9300L-24P-4X for a 24-port PoE access option.
• Cisco Catalyst C9300L-48P-4G for a 48-port PoE configuration with 1G uplinks.
• Cisco Catalyst C9200L-48PXG-4X for comparison with a different Catalyst access platform.
• Cisco Catalyst C9200L-48P-4X-E for another enterprise access option.
• Cisco Catalyst C9200-48PXG for comparison across the Catalyst 9200 family.
• Cisco Catalyst C9200-48PL for a different port and power configuration.
• Cisco Catalyst C9300X-24Y-E for a fiber-oriented high-speed switching option.

Installation and Compatibility Considerations

Before deploying the C9300LM-48UX-4Y, confirm that the switch fits the available rack depth and that the site provides the required power, cooling, and cable management. Check the electrical requirements of all powered endpoints and calculate the expected PoE load, allowing sufficient capacity for planned growth.

For fiber uplinks, verify the compatibility of SFP28 transceivers and the optical specifications of the connected equipment. Review the supported stacking configuration and software requirements when combining multiple switches. Do not assume that every Catalyst 9300, 9300L, 9300LM, or 9300X model uses interchangeable power supplies, stacking accessories, or uplink components.

Organizations planning a broader network refresh can also browse the Cisco Catalyst C9200L-24P-4G-E, Cisco Catalyst C9200L-48P-4G-E, and Cisco Catalyst C9200L-48T-4X-E product pages.

Why Choose the Cisco Catalyst C9300LM-48UX-4Y?

The C9300LM-48UX-4Y is a strong candidate for organizations that want a compact enterprise access switch with a combination of Gigabit and multigigabit copper connectivity, Cisco UPOE, and four fixed 25G uplinks. Its design can simplify deployments where only selected endpoints require multigigabit speeds but the wider access layer still needs a high port count.

The switch is particularly worth evaluating when upgrading wireless access, consolidating PoE-connected devices, or increasing the capacity between access and distribution layers. Its suitability ultimately depends on the exact feature set, software licensing, power budget, and compatibility requirements of the target network.

For more information about Nexoget and its catalog, visit the About Us page or explore all available products through the Nexoget shop. If you need help confirming a model or configuration, use the Contact Us page before placing an order.

Frequently Asked Questions

How many ports does the Cisco C9300LM-48UX-4Y have?

The switch has 48 copper access ports: 40 standard 10/100/1000 Mbps ports and eight multigigabit ports supporting speeds up to 10 Gbps. It also provides four fixed 25G SFP28 uplinks.

Does the C9300LM-48UX-4Y support Power over Ethernet?

Yes. It supports Cisco UPOE on its access ports. The total available power depends on the installed power supply configuration and applicable hardware limits. Check endpoint requirements and the switch power budget before deployment.

What uplink speeds are supported?

The model includes four fixed 25 Gigabit Ethernet SFP28 uplinks. Appropriate compatible optics and fiber connections must be selected for the network design.

Is the C9300LM-48UX-4Y suitable for wireless access points?

It can be suitable for compatible enterprise wireless access points, particularly when multigigabit Ethernet and PoE are required. Confirm the access point’s data rate, power requirements, cabling, and compatibility before installation.

How does the C9300LM-48UX-4Y differ from the C9300LM-48U-4Y?

Both models provide 48 copper access ports, UPOE, and four fixed 25G uplinks. The C9300LM-48UX-4Y adds eight multigigabit ports supporting speeds up to 10 Gbps, whereas the C9300LM-48U-4Y provides 48 standard Gigabit Ethernet ports.

What should buyers verify before ordering?

Verify the complete part number, software license, hardware condition, power supply, included accessories, warranty, shipping arrangements, and compatibility with the intended network. For international orders, also confirm local power requirements and any applicable import or support considerations.

Buy Cisco Catalyst C9300LM-48UX-4Y from Nexoget

Upgrade your enterprise network with the Cisco Catalyst C9300LM-48UX-4Y Switch, a compact access-layer platform combining 48 copper ports, eight multigigabit connections, Cisco UPOE, and four fixed 25G uplinks. Compare related Catalyst 9300, Catalyst 9300X, and Catalyst 9300L options to identify the best fit for your access-layer requirements.

Visit Nexoget to explore networking equipment for business and enterprise environments. For assistance with product availability, specifications, and order details, contact the Nexoget team through the official website.