Cisco C9300-24S Switch

The Cisco Catalyst C9300-24S Switch is an enterprise-class, high-density 24-port Small Form-Factor Pluggable (SFP) fiber aggregation switch engineered for scalable campus backbones, secure fiber distribution layers, and mission-critical corporate networks. Positioned at the core of Cisco’s flagship stackable switching portfolio, the C9300-24S delivers unprecedented optical throughput, hardware-anchored security, advanced telemetry, and complete alignment with Cisco Digital Network Architecture (Cisco DNA) and Software-Defined Access (SD-Access).

Designed to consolidate long-distance fiber connections across remote wiring closets, multi-building campuses, and high-bandwidth server clusters, the C9300-24S features 24 dedicated 1G SFP slots, dual redundant hot-swappable power supplies, modular uplink flexibility, and resilient stacking capabilities via Cisco StackWise-480 technology. Whether deployed as a central fiber aggregation hub in enterprise branch offices or as a dedicated distribution node, the C9300-24S ensures maximum uptime, low latency, and deterministic network performance.

Key Highlights and Architectural Advantages

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• 24 Dedicated Gigabit SFP Fiber Ports: Purpose-built for high-density optical aggregation, supporting both short-reach multimode (MMF) and long-reach single-mode (SMF) fiber transceivers.
• Cisco StackWise-480 Technology: Stack up to 8 switches into a single logical entity with an incredible 480 Gbps of stacking bandwidth, simplified management, and cross-stack resiliency.
• Cisco StackPower Innovation: Enables intelligent power sharing and redundant power pooling across stacked units to protect against power supply failures.
• Modular Uplink Options: Extend core connectivity using interchangeable network modules supporting 1G, 10G, 25G, and 40G uplinks.
• x86 CPU & Open Application Hosting: Powered by a multi-core 1.8 GHz x86 processor with 8 GB memory to host containerized applications and third-party monitoring tools directly on the switch.
• Zero-Trust Hardware Security: Features Encrypted Traffic Analytics (ETA), AES-256 MACsec encryption, Trust Anchor modules, and Secure Boot protection.
• Cisco IOS XE Operating System: Modern, open, and programmable operating system supporting model-driven telemetry, NETCONF, RESTCONF, Python scripting, and automated provisioning.

High-Density Fiber Aggregation and Core Switching Capabilities

The primary advantage of the Cisco C9300-24S switch lies in its native SFP fiber port density. Unlike copper-based access switches such as the Cisco C9300-24T, Cisco C9300-48T, Cisco C9300-24P, or Cisco C9300-48P, the C9300-24S provides 24 SFP optic slots designed specifically for fiber cabling. Fiber optics offer immunity to electromagnetic interference (EMI), enhanced security against physical wiretapping, and extended transmission distances far exceeding the 100-meter copper limit.

At the heart of the C9300-24S is Cisco’s Unified Access Data Plane 2.0 (UADP 2.0) ASIC. This programmable engine enables flexible packet queuing, hardware-based Access Control Lists (ACLs), and full Layer 2 and Layer 3 wire-speed forwarding. For networks demanding higher multi-gigabit copper density alongside fiber aggregation, organizations frequently pair the C9300-24S with high-power PoE models such as the Cisco C9300-24U, Cisco C9300-48U, Cisco C9300-24UB, Cisco C9300-48UN, Cisco C9300-48UXM, Cisco C9300-24UX, Cisco C9300-24H, and Cisco C9300-48H.

StackWise-480 and StackPower Redundancy

Network availability is critical in enterprise aggregation layers. Through Cisco StackWise-480, up to eight Catalyst 9300 Series switches can be joined into a unified logical switch operating under a single management IP. Non-Stop Forwarding with Stateful Switchover (NSF/SSO) ensures sub-second failure recovery, meaning network traffic continues without disruption if a stack master fails.

Additionally, Cisco StackPower allows power supplies across stacked units to be combined into a shared power pool. If a power supply unit (PSU) experiences an outage, auxiliary power is dynamically routed from the pool to keep all switches operational. For extreme bandwidth requirements or multi-gigabit uplink aggregation, the C9300-24S links seamlessly into ultra-high-speed core switches like the Cisco C9300X-12Y-E, Cisco C9300X-24Y-E, Cisco C9300X-48HX, Cisco C9300X-48TX, Cisco C9300X-48HXN, and Cisco C9300X-24HX.

Cisco C9300-24S Technical Specifications

The following table provides detailed technical parameters, hardware performance, and physical attributes of the Cisco Catalyst C9300-24S switch:

Comparative Analysis: Cisco C9300-24S vs. Catalyst Hardware Family

To help network administrators choose the ideal hardware for their topology, the comparison table below outlines key feature distinctions between the C9300-24S fiber switch, modular uplink accessories, and compact branch switches across the Catalyst product lineup:

Software Features and Subscription Licensing Structure

The Cisco C9300-24S operates under the universal Cisco IOS XE software image, offering automated configuration, advanced security, and full operational transparency. The switch supports two primary licensing tiers to match organizational requirements:

1. Network Essentials / Cisco DNA Essentials

Delivers complete Layer 2 networking capabilities, essential Layer 3 routing (Static Routing, RIP, OSPF Routed Access), VXLAN micro-segmentation, software auto-upgrade, model-driven telemetry, and foundational monitoring via Cisco DNA Center.

2. Network Advantage / Cisco DNA Advantage

Unlocks advanced enterprise-grade Layer 3 routing protocols including full Border Gateway Protocol (BGP), EIGRP, IS-IS, Policy-Based Routing (PBR), Cisco TrustSec, complete SD-Access fabric orchestration, stateful switchover (SSO), and containerized application hosting.

Enterprise Deployment Use Cases

Campus & Building Optical Aggregation

In multi-building campuses or corporate headquarters, the C9300-24S serves as an ideal aggregation layer. It aggregates optical links originating from access closet switches spread across multiple floors and routes them to core data centers over high-speed uplinks.

High-Security Government and Financial Networks

Due to the physical immunity of optical fiber against signal tapping and electromagnetic interference, the C9300-24S is widely deployed in secured government, banking, and defense environments. Hardware-based AES-256 MACsec encryption ensures total data confidentiality across fiber links.

Long-Distance Industrial Facilities

Manufacturing plants, airports, and logistics distribution centers frequently span distances exceeding 100 meters. Utilizing single-mode SFP optical transceivers, the C9300-24S connects remote field buildings located kilometers away without requiring repeater hardware.

Frequently Asked Questions (FAQ)

Q1: Can 10G SFP+ transceivers be plugged into the 24 base ports of the C9300-24S?

No. The 24 base ports on the C9300-24S are native 1G SFP slots supporting 1000Base-X optics (and select 100M SFP optics). To achieve 10G SFP+ or 25G SFP28 connectivity, you must install an appropriate modular uplink network module or consider native 10G/25G platforms like the Cisco C9300X-12Y-E or Cisco C9300X-24Y-E.

Q2: Can I stack the C9300-24S fiber switch with copper Catalyst 9300 models?

Yes! Cisco StackWise-480 supports full mixed stacking across the Catalyst 9300 family. You can stack the C9300-24S fiber aggregation switch with copper access switches such as the C9300-24T, C9300-24P, or high-density C9300-48T units under a single unified stack master.

Q3: Does the C9300-24S support PoE or UPoE output?

No. Because all 24 base ports are SFP fiber optic interfaces, they do not deliver Power over Ethernet (PoE). If your network requires PoE/UPoE for IP cameras, Wi-Fi access points, or VoIP phones, consider models like the C9300-24P, C9300-24U, C9300X-48HX, or compact models like the C9200CX-12P-2X2G.

Q4: What network uplink modules and accessories are supported?

The C9300-24S supports a wide variety of optional modular network modules. Additionally, accessory modules across Cisco’s enterprise architecture—including the Cisco C9200-NM-2Y, Cisco C9200-NM-2Q, Cisco C9200-NM-4G, and Cisco C9200-NM-4X—offer standardized uplink integration. Unused uplink slots should be covered using a Cisco C9200-NM-BLANK cover to maintain proper thermal airflow.

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For custom enterprise price quotes, bulk inventory availability, or expert network architecture consultation regarding the Cisco Catalyst C9300-24S Switch, reach out to our network engineering team today through the NexoGet online store.