Cisco C9300-24U Switch

The Cisco Catalyst C9300-24U Switch represents the pinnacle of enterprise-grade access layer networking, engineered specifically to power high-density Internet of Things (IoT) environments, smart building integrations, high-performance Wi-Fi 6/6E deployments, and secure corporate infrastructure. As a core foundation of Cisco’s flagship Catalyst 9300 Series—the industry’s leading stackable enterprise switching platform—the C9300-24U delivers 24 ports of Cisco Universal Power over Ethernet (UPoE), providing up to 60W of power per port alongside advanced Layer 2 and full Layer 3 switching capabilities.

Designed to serve as the benchmark for intent-based networking (IBN), the C9300-24U hardware architecture is built around Cisco’s custom Unified Access Data Plane (UADP) 2.0 Application-Specific Integrated Circuit (ASIC) and powered by an x86 open CPU architecture. This design enables seamless software-defined networking (SDN), hardware-accelerated telemetry, cryptographic execution, and containerized application hosting directly on the switch. Whether you are upgrading legacy campus infrastructure or deploying next-generation connectivity in enterprise branch offices, the Cisco C9300-24U ensures maximum operational efficiency, bulletproof security, and high availability. To explore similar high-capacity enterprise solutions, check our C9300-24P PoE+ Switch for standard power applications or review our entry-level enterprise options like the C9300-24T Data-Only Switch.

Key Features and Technical Specifications Overview

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The Cisco C9300-24U is optimized to satisfy the demanding requirements of modern converged networks where data, voice, video, and high-power IoT end-devices share a single secure access fabric. Below is a detailed technical summary of the core switching metrics, power delivery capabilities, and physical architecture of the C9300-24U platform.

Cisco C9300-24U Core Hardware Specifications

Cisco Universal Power over Ethernet (UPoE) Architecture

One of the primary advantages of the Cisco C9300-24U is its full support for Cisco UPoE technology across all 24 10/100/1000 Mbps RJ-45 ports. Traditional PoE+ (IEEE 802.3at) delivers up to 30 Watts of power per port, which is sufficient for standard IP phones, dual-radio wireless access points, and basic surveillance cameras. However, next-generation enterprise hardware requires higher power delivery directly over standard Category 5e/6/6a Ethernet cabling.

Cisco UPoE doubles the power capacity of standard PoE+ by utilizing all four copper pairs within the Ethernet cable to deliver up to 60 Watts of DC power per port. This capacity makes the C9300-24U the perfect infrastructure engine for high-demand edge devices, including:

• Wi-Fi 6 and Wi-Fi 6E Access Points: High-throughput tri-band access points requiring full power for maximum spatial streams and radio coverage.
• Smart Building and LED Lighting Systems: Centralized DC-powered architectural lighting networks, occupancy sensors, and smart controllers.
• Compact Digital Signage and POS Terminals: High-definition displays, interactive kiosks, and point-of-sale systems requiring single-cable power and data.
• Advanced Pan-Tilt-Zoom (PTZ) IP Security Cameras: Outdoor thermal and motorized cameras equipped with internal heating elements and high-definition sensors.
• High-End Desktop VDI Clients and IP Turrets: Virtual desktop infrastructure endpoints and financial trading desk voice consoles.

For organizations deploying higher-density multi-gigabit access points or ultra-high-power environments, consider evaluating our advanced multigigabit line including the C9300X-24HX Multigigabit Switch and the heavy-duty C9300X-48HX UPoE+ Switch, both capable of delivering up to 90W UPoE+ per port.

StackWise-480 and StackPower High-Availability Technologies

Unplanned network downtime in enterprise branch offices or core campus environments can freeze operations and severely impact revenue. The Cisco C9300-24U addresses high availability through two industry-leading hardware technologies: Cisco StackWise-480 and Cisco StackPower.

StackWise-480: Scalable Stacking with High Backplane Speed

StackWise-480 technology provides a unified stack backplane speed of 480 Gbps, enabling up to 8 switches to be connected together into a single logical unit. This setup allows network administrators to manage up to 192 ports as a single IP address, unified control plane, and single management surface. StackWise-480 uses state-of-the-art special stacking cables and hardware-driven Nonstop Forwarding with Stateful Switchover (NSF/SSO), ensuring that if an active switch in the stack fails, a standby switch takes over instant control without dropping existing user sessions or voice calls.

StackPower: Intelligent Power Pooling

Cisco StackPower is an innovative power interconnection system that allows individual power supplies across stacked C9300 switches to be pooled into a single shared power reservoir. Using special StackPower cables, power can be dynamically allocated to whichever switch or UPoE port requires it most. Furthermore, StackPower allows administrators to configure zero-touch power redundancy: if a power supply or circuit breaker fails on one switch, the remaining power supplies in the stack automatically absorb the load without dropping connected UPoE devices.

If your design requires smaller branch deployment stacking solutions or lower-cost entry points, you can contrast this with our fixed-uplink stacking switches like the C9300L-48T-4X-A Switch or explore our cost-effective SMB managed stackables like the C1300X-24P-4X Managed Switch.

Advanced Hardware Architecture and Modular Flexibility

The Cisco C9300-24U is built from the ground up to support modularity and field upgrades, eliminating the need for expensive rip-and-replace network refreshes. The switch chassis features hot-swappable uplink modules, dual hot-swappable power supplies, and field-replaceable fan trays.

Flexible Uplink Network Modules (NetMods)

Unlike fixed-uplink switches, the C9300-24U features an open uplink slot on the front panel, supporting a wide range of hot-swappable network modules. This modular approach allows network engineers to adapt their uplink speed as campus traffic requirements evolve over time. Supported network modules include:

• 4 x 1G SFP Module
• 4 x 10G SFP+ Module
• 8 x 10G SFP+ Module
• 2 x 25G SFP28 Module
• 2 x 40G QSFP+ Module
• Multigigabit Uplink Modules (supporting 1G, 2.5G, 5G, and 10G speeds)

For network backbones that demand ultra-fast fiber aggregation or high-density optical routing, high-tier switches such as the C9300-24S-E Fiber Switch, the high-speed C9300X-12Y-E Fiber Switch, or the massive C9500-48Y4C-E Core Switch provide ideal fiber-optic connectivity.

Software-Defined Access (SD-Access) and Cisco DNA Center Integration

The Cisco Catalyst C9300 Series forms the foundational building block for Cisco SD-Access—the industry’s first policy-based automation and security segmentation architecture from campus edge to cloud. Combined with Cisco DNA Center (Cisco Catalyst Center), the C9300-24U delivers total visibility, automated provisioning, and proactive network analytics.

Core Benefits of SD-Access on C9300-24U

• Automated Network Provisioning: Zero-touch onboarding of new switches, automatic configuration deployment, and rapid site rollouts without manual CLI configuration.
• Identity-Based Micro-Segmentation: Utilizing Cisco TrustSec and Scalable Group Tags (SGTs), the network enforces security policies based on user identity and device role rather than static IP addresses or VLANs.
• Encrypted Traffic Analytics (ETA): Using the processing capability of the UADP 2.0 ASIC, the switch analyzes encrypted data streams for malware and security threats without requiring hardware-intensive SSL/TLS decryption.
• Proactive Network Health & Telemetry: Real-time streaming telemetry and AI-driven insights identify potential wireless performance bottlenecks, application latency, or cabling issues before users report them.

For organizations transitioning from basic managed switches to enterprise SD-Access environments, comparing the C9300-24U with mid-tier options like the C9200-48P-E Managed Switch or the entry-level enterprise C9200L-24P-4X-E Switch helps clarify software licensing and hardware performance boundaries.

Comprehensive Security and Threat Defense Architecture

Modern enterprise networks face continuous, sophisticated security threats targeting edge hardware and IoT devices. The Cisco C9300-24U implements end-to-end hardware-anchored security controls designed to protect both the switch itself and all connected endpoints.

Hardware-Anchored Cisco Secure Boot

At the foundation of the C9300-24U security architecture is the Cisco Trust Anchor module (TAM). The Trust Anchor is a tamper-proof microcontroller that verifies the authenticity of the hardware, authenticates the bootloader software, and ensures that only genuine, cryptographically signed Cisco IOS XE firmware can execute on the switch.

MACsec 256-bit Encryption

Data privacy between switches or from the switch to server infrastructure is safeguarded via IEEE 802.1AE MACsec encryption. The C9300-24U supports line-rate 256-bit Advanced Encryption Standard (AES) link-layer encryption, ensuring that data transmitted across physical links is completely protected against eavesdropping, wiretapping, and man-in-the-middle attacks.

Advanced Access Control & Threat Defense

In addition to physical and firmware security, the C9300-24U provides comprehensive Layer 2 through Layer 4 network defense mechanisms:

• Dynamic ARP Inspection (DAI): Prevents ARP spoofing and poison attacks by verifying ARP requests against a binding database.
• DHCP Snooping: Filters untrusted DHCP messages and blocks malicious unauthorized DHCP servers on the enterprise network.
• IP Source Guard (IPSG): Prevents IP spoofing by cross-checking traffic against the DHCP snooping binding database.
• 802.1X and MAC Authentication Bypass (MAB): Ensures that only authenticated users and compliant devices are granted network access.

For smaller localized operations or remote sites where simplified security profiles are sufficient, inspect compact access switches like our C9200CX-12P-2X2G Compact Switch or the cost-effective C1000-24P-4G-L Gigabit Switch.

Detailed Comparison: Cisco Catalyst 9300 vs. 9200 vs. 1300 Series

To assist network architects in choosing the exact hardware platform for their specific budget and operational scale, the table below provides a side-by-side comparison between the Cisco C9300-24U, the C9200 enterprise series, and the Cisco Business 1300 series.

Enterprise Switch Series Feature Comparison

When selecting between these families, network managers seeking high-density 48-port PoE solutions in the C9200 range can examine the C9200-48PB PoE+ Switch or the C9200L-48P-4X-E Access Switch. For SMB applications with high-power requirements, review the C1300X-48P-4X Managed Switch or the compact C1300-8P-E-2G Smart Switch.

Energy Efficiency, Power Management, and Green IT

As enterprise power consumption and carbon footprint reduction become key metrics for IT departments, the Cisco C9300-24U integrates powerful green technology features to optimize operational expenses (OpEx).

Energy Efficient Ethernet (EEE)

The C9300-24U supports IEEE 802.3az Energy Efficient Ethernet, which automatically reduces power consumption on idle Ethernet links without disconnecting the physical link or affecting packet wake-up response times. During periods of low network activity, transceiver circuits enter a low-power sleep mode, conserving significant amounts of energy across high-port-density deployments.

Per-Port Power Management and Scheduling

Through Cisco EnergyWise technology and standard Command Line Interface (CLI) settings, network administrators can set automated power schedules for connected UPoE devices. For example, IP phones, wireless access points, and office smart displays can be configured to power down outside business hours or over weekends, dramatically cutting power bills in large office complexes.

For multi-building campus layouts requiring lightweight branch routing or wireless extension alongside efficient switches, complement your installation with MikroTik edge hardware such as the MikroTik RB5009UG+S+IN Router, the enterprise core MikroTik CCR2004-16G-2S+ Router, or high-capacity carrier routers like the MikroTik CCR2116-12G-4S+ Router.

Deployment Use Cases and Application Architecture

The versatile design of the Cisco C9300-24U makes it an ideal investment for a wide spectrum of modern IT environments. Below are three primary real-world deployment scenarios where the C9300-24U excels.

1. High-Density Smart Office and Building Automation

Modern commercial buildings utilize UPoE technology to consolidate power distribution and network data into a single infrastructure. The C9300-24U provides up to 60W per port to run smart LED lighting panels, motorized window blinds, room occupancy sensors, and digital door access controllers. By eliminating the need for dedicated electrical conduit and AC outlets at every device endpoint, building owners drastically reduce initial construction and installation costs while gaining central management of building systems through software.

2. Enterprise Wi-Fi 6 / Wi-Fi 6E Wireless Aggregation

Next-generation Wi-Fi 6 (802.11ax) and Wi-Fi 6E access points require more than standard 15.4W or 30W PoE power to operate all radios, spatial streams, and internal scanning engines simultaneously. With 60W UPoE available on every port, the C9300-24U ensures that wireless access points receive uninterrupted power with ample power budget overhead, preventing access points from disabling essential features due to power starvation.

3. Secure Financial and Healthcare Endpoint Switching

In financial trading environments and healthcare facilities, endpoint reliability, high speed, and absolute data privacy are non-negotiable. The combination of StackWise-480 high availability, StackPower redundancy, 256-bit MACsec encryption, and Cisco TrustSec micro-segmentation makes the C9300-24U the gold standard for connecting medical imaging equipment, patient monitoring devices, financial trading turrets, and secure workstations.

For organizations requiring specialized high-density multi-gigabit access to power high-end Wi-Fi networks, consider pairing your installation with high-throughput models such as the C9300X-48HXN Multigigabit Switch or review high-capacity enterprise switches like the C9300X-24Y-E SFP28 Switch.

Cisco Catalyst 9300 Series Licensing Architecture

The Cisco Catalyst C9300-24U operates on a flexible software licensing structure designed to simplify management, unlock advanced features, and provide continuous software innovation. Cisco Catalyst switches use a subscription-based licensing framework consisting of two core tier structures: Cisco Network Essentials / Advantage and Cisco DNA Essentials / Advantage.

Licensing Tier Breakdown

• Network Essentials & Network Advantage: Perpetual licenses that cover foundational switching capabilities. Network Essentials provides complete Layer 2 switching, basic Layer 3 routing (Routed Access, OSPF Stub, EIGRP Stub), and quality of service (QoS). Network Advantage adds full Layer 3 dynamic routing (OSPF, BGP, EIGRP, IS-IS), VXLAN support, and advanced high availability.
• Cisco DNA Essentials & Cisco DNA Advantage: Term-based subscriptions (3, 5, or 7 years) that unlock cloud-managed automation, centralized policy control via Cisco Catalyst Center, AI Network Analytics, Encrypted Traffic Analytics (ETA), and Cisco Software-Defined Access (SD-Access).

For full details on selecting the proper software license tier for your organization, contact our technical sales specialists at NexoGet or review our comprehensive product resources like our Complete Cisco Switch Selection Guide.

frequently Asked Questions (FAQ)

1. What is the difference between Cisco UPoE on the C9300-24U and standard PoE+?

Standard PoE+ (IEEE 802.3at) delivers a maximum of 30 Watts of power per port over two pairs of Ethernet cabling. Cisco UPoE (Universal Power over Ethernet) uses all four wire pairs inside standard Cat5e/6 cables to deliver up to 60 Watts of DC power per port. This allows the switch to power demanding endpoints such as Wi-Fi 6E access points, compact desktop PCs, smart LED lighting, and motorized security cameras without external power injectors.

2. Can the Cisco C9300-24U be stacked with older Cisco Catalyst switches like the 3850 or 2960X?

No, Cisco Catalyst 9300 Series switches cannot be physically stacked via StackWise cables with legacy platforms like the Catalyst 3850, 3650, or 2960X series. However, C9300 switches can be seamlessly stacked with other C9300 models (including standard C9300 and C9300X models using appropriate stacking bandwidth parameters) to create a unified management domain.

3. Does the C9300-24U come with built-in uplink ports?

The C9300-24U chassis features an open modular uplink slot. Uplink ports are provided by installing optional Network Modules (NetMods), which are hot-swappable and available in configurations ranging from 4x 1G, 4x 10G, 8x 10G, up to 2x 25G or 2x 40G speeds depending on your core aggregation needs.

4. What happens if a power supply fails in a stacked C9300-24U setup using StackPower?

If StackPower cables are connected across the switch stack, power supplies are aggregated into a shared power pool. If a power supply fails on one switch, the remaining power supplies in the pool instantly supply power to the affected switch without interruption or dropping connected UPoE devices.

5. Is the Cisco C9300-24U compatible with non-PoE Ethernet devices?

Yes. The switch ports are fully auto-sensing and backward compatible. The C9300-24U safely tests connected devices before supplying power. If a standard non-PoE device (such as a server or desktop computer) is plugged in, the switch transmits data normally without sending electrical power to the port.

Why Buy the Cisco C9300-24U from NexoGet?

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