C9300-48UB-A Cisco Catalyst Ethernet 48 Ports Manageable Switch.

Overview of Cisco C9300-48UB-A Catalyst Ethernet Switch 

The Cisco C9300-48UB-A Catalyst Ethernet 48 Ports Manageable 3 Layer Switch is a high-performance, enterprise-grade networking solution designed to deliver secure, scalable, and energy-efficient connectivity. As part of the Cisco Catalyst 9300 Series, this switch is optimized for high-density access, making it ideal for modern businesses, data centers, and network infrastructures requiring advanced security and automation features.

Main Specification

• Manufacturer: Cisco
• Part Number: C9300-48UB-A
• Product Series: Catalyst 9300
• Product Type: Ethernet Switch

Technical Information

• Number of Ports: 48
• Supported Speeds: 10/100/1000 Mbps
• Form Factor: Rack-mountable 1U
• Ethernet Type: Gigabit Ethernet
• Power over Ethernet (PoE): Universal PoE (UPOE)
• Maximum PoE Budget: 822W
• Switching Capacity: 256 Gbps
• Stacking Bandwidth: 480 Gbps
• Total Switching Capacity with Stacking: 736 Gbps
• Forwarding Rate: 190.48 Mpps
• Forwarding Rate with Stacking: 547.62 Mpps

Routing and Network Capabilities

• IPv4 Route Entries: 64,000
• IPv6 Route Entries: 32,000
• Flexible NetFlow Entries: 128,000
• VLAN Capacity: 4,000 IDs
• Switched Virtual Interfaces (SVIs): 1,000
• Jumbo Frame Support: 9,198 bytes

MAC and Protocol Support

• MAC Address Table Size: 32,000 entries
• Supported Routing Protocols: OSPF, BGP, EIGRP, RIP, HSRP, VRRP, IS-IS, MPLS, PIM-SM, and more
• Remote Management: SNMP (1, 2c, 3), RMON (1, 2), CLI, NETCONF, RESTCONF

Advanced Features

• Support for VLAN Double Tagging (Q-in-Q) and Private VLAN
• Integration with Cisco StackWise-480 and StackPower Technology
• Quality of Service (QoS) and Access Control List (ACL) support
• Built-in security features, including MACsec encryption
• Flexible NetFlow (FNF) and Application Visibility
• Support for Layer 2 and Layer 3 redundancy protocols

Compliance and Standards

• IEEE 802.3, 802.1D, 802.1Q, 802.3u, 802.3ab, 802.1p, 802.3af, 802.3x
• IEEE 802.3ad (LACP), 802.1w, 802.1x, 802.1s, 802.3at

Power and Physical Dimensions

• Power Supply: AC 120/230V (50-60 Hz)
• Power Redundancy: Optional

Overview of Cisco C9300-48UB-A Catalyst Ethernet Switch  

The Cisco C9300-48UB-A Catalyst Ethernet switch category represents a high-performance class of enterprise-grade networking hardware designed to meet the evolving requirements of modern digital infrastructures. Positioned within the Cisco Catalyst 9300 Series, this category focuses on fixed-access, multilayer switches that deliver advanced Layer 2 and Layer 3 capabilities, high-density connectivity, and intelligent network management. The C9300-48UB-A model specifically addresses environments that demand a balance of copper and high-speed uplink flexibility, robust security, and seamless scalability. This category is widely adopted across enterprise campuses, branch offices, data-driven organizations, and complex distributed networks that require consistent performance and reliability.

Role Within Enterprise Network Architecture

Within enterprise network design, the Cisco C9300-48UB-A Catalyst switch category plays a foundational role at the access layer while also supporting advanced routing and policy enforcement typically associated with distribution layers. The architecture enables organizations to consolidate network functions, reduce hardware complexity, and improve operational efficiency. By integrating advanced switching, routing, and security services into a single platform, this category supports streamlined network topologies that are easier to manage, scale, and secure. The switch category aligns with Cisco’s intent-based networking approach, allowing network policies to be defined centrally and enforced consistently across all connected devices.

Hardware Architecture and Switching Performance

The Cisco C9300-48UB-A Catalyst switch category is built on a purpose-driven hardware architecture that emphasizes throughput, resiliency, and long-term performance sustainability. Designed to support high-density access deployments, the internal switching fabric and forwarding mechanisms ensure low latency and predictable traffic handling across all ports. The platform’s architecture supports full wire-speed performance even when advanced features such as access control lists, quality of service, and encryption are enabled. This level of performance consistency makes the category suitable for environments with demanding real-time applications, including voice, video, and collaboration workloads.

Port Density and Connectivity Design

This category centers on a 48-port configuration that provides extensive Ethernet connectivity for end-user devices, access points, and IoT endpoints. The design supports mixed media types and power delivery requirements, enabling organizations to deploy a single standardized switch model across multiple locations. The port layout and internal circuitry are optimized for continuous operation, ensuring stable connectivity even under sustained traffic loads. The connectivity design supports modern bandwidth demands while maintaining backward compatibility with legacy devices, allowing gradual infrastructure upgrades without disruption.

Uplink Integration and Bandwidth Expansion

The Cisco C9300-48UB-A Catalyst category includes uplink flexibility that enables seamless integration with aggregation and core layers. High-speed uplink options support increased bandwidth between network tiers, reducing congestion and ensuring efficient data flow across the enterprise. This uplink design supports scalable architectures where additional capacity can be introduced as network demand grows. By supporting modular uplink configurations, the category ensures long-term adaptability without requiring complete hardware replacement.

Layer 3 Capabilities and Advanced Routing Functions

A defining characteristic of the Cisco C9300-48UB-A Catalyst switch category is its comprehensive Layer 3 functionality. Beyond basic switching, this category supports advanced routing protocols and services that enable intelligent traffic management across complex network topologies. The inclusion of dynamic routing capabilities allows organizations to implement resilient designs with multiple paths, automatic failover, and efficient route selection. These features are particularly valuable in campus networks where high availability and predictable performance are critical.

Support for Modern Routing Protocols

The category supports a wide range of industry-standard routing protocols, enabling interoperability with diverse network environments. This support allows the switch to participate actively in routed networks, making forwarding decisions based on real-time topology information. The routing capabilities enhance network flexibility and allow administrators to design scalable architectures that can evolve alongside business requirements. By integrating routing at the access layer, the category reduces reliance on separate routing devices, simplifying network design and lowering operational overhead.

Multicast and Traffic Optimization

Multicast support within the Cisco C9300-48UB-A Catalyst category enables efficient distribution of data streams to multiple endpoints without unnecessary duplication. This capability is essential for applications such as video conferencing, digital signage, and content distribution. Traffic optimization mechanisms ensure that bandwidth is used efficiently, minimizing latency and packet loss. These features contribute to a consistent user experience even in high-density network environments.

Security Architecture and Policy Enforcement

Security is a core focus of the Cisco C9300-48UB-A Catalyst Ethernet switch category. The platform integrates multiple layers of protection to safeguard network access, data integrity, and operational continuity. Security features are embedded directly into the hardware and software architecture, enabling proactive threat detection and response. This category is designed to support zero-trust principles by ensuring that every device and user is authenticated, authorized, and continuously monitored.

Access Control and Authentication Mechanisms

The category supports advanced access control mechanisms that regulate who and what can connect to the network. Authentication frameworks enable secure onboarding of users and devices, ensuring that only trusted entities gain access. These capabilities are essential in environments with diverse device types, including employee endpoints, guest devices, and IoT sensors. By enforcing consistent security policies at the access layer, the switch category reduces the risk of unauthorized access and lateral movement within the network.

Encryption and Secure Communications

Encryption features within the Cisco C9300-48UB-A Catalyst category protect sensitive data as it traverses the network. Hardware-assisted encryption ensures that security does not come at the expense of performance. Secure management protocols protect administrative access, reducing exposure to management plane attacks. These encryption capabilities align with regulatory compliance requirements and support organizations operating in highly regulated industries.

Threat Detection and Segmentation

Integrated threat detection capabilities allow the switch category to identify anomalous behavior and potential security incidents in real time. Network segmentation features enable administrators to isolate traffic flows based on role, device type, or application, limiting the impact of potential breaches. This granular control supports defense-in-depth strategies and enhances overall network resilience.

Thermal Design and Reliability

The thermal architecture of the Cisco C9300-48UB-A Catalyst category is designed for continuous operation in demanding environments. Efficient airflow and heat dissipation mechanisms protect internal components and extend hardware lifespan. Redundant cooling options contribute to high availability and reduce the risk of downtime caused by thermal issues. This reliability is critical for mission-critical networks that must operate without interruption.

Network Management and Automation Capabilities

Effective network management is a key strength of the Cisco C9300-48UB-A Catalyst Ethernet switch category. The platform integrates with centralized management systems that provide visibility, control, and automation across the entire network. These capabilities reduce administrative complexity and enable faster deployment of new services and policies.

Centralized Visibility and Monitoring

Comprehensive monitoring features provide real-time insight into network performance, device health, and traffic patterns. Administrators can quickly identify and resolve issues before they impact users. Historical analytics support capacity planning and performance optimization, ensuring that the network continues to meet organizational needs as demand evolves.

Automation and Programmability

The category supports modern programmability frameworks that enable automation of routine tasks and rapid implementation of configuration changes. Automation reduces the potential for human error and accelerates response times. Programmable interfaces allow integration with orchestration tools and custom workflows, aligning network operations with broader IT automation strategies.

Intent-Based Networking Alignment

The Cisco C9300-48UB-A Catalyst category aligns with intent-based networking principles, allowing administrators to define desired outcomes rather than manual configurations. The system continuously validates network behavior against defined intent, automatically adjusting configurations to maintain compliance. This approach simplifies network operations and enhances consistency across distributed environments.

Scalability, Stacking, and High Availability

Scalability is a defining attribute of the Cisco C9300-48UB-A Catalyst Ethernet switch category. The platform supports stacking technologies that allow multiple switches to operate as a single logical unit. This capability simplifies management, increases port density, and enhances resiliency. High availability features ensure continuous operation even in the event of hardware or link failures.

Stacking Architecture and Benefits

Stacking enables organizations to expand network capacity incrementally while maintaining a unified management interface. The stacked architecture provides redundancy for control and data planes, reducing the risk of single points of failure. This design supports seamless scalability and simplifies network expansion projects.

Redundancy and Fault Tolerance

Redundant power supplies, fans, and uplink paths contribute to the high availability of the Cisco C9300-48UB-A Catalyst category. These features ensure that network services remain available during component failures or maintenance activities. Fault-tolerant design principles enhance reliability and support business continuity objectives.

Deployment Scenarios and Industry Use Cases

The Cisco C9300-48UB-A Catalyst switch category is versatile and adaptable, making it suitable for a wide range of deployment scenarios. Its combination of performance, security, and manageability supports diverse industry requirements. Organizations across sectors rely on this category to deliver consistent connectivity and support digital transformation initiatives.

Enterprise Campus Networks

In enterprise campus environments, the category provides reliable access connectivity for users, devices, and applications. The advanced feature set supports collaboration tools, cloud services, and mobility initiatives. Consistent policy enforcement and centralized management simplify operations across large campuses.

Branch and Distributed Office Deployments

For branch offices and distributed locations, the Cisco C9300-48UB-A Catalyst category offers a compact yet powerful solution that integrates seamlessly with centralized IT operations. Secure connectivity and automation capabilities reduce the need for on-site expertise while maintaining enterprise-grade performance.

Education, Healthcare, and Industrial Environments

In education, healthcare, and industrial settings, the category supports specialized requirements such as high device density, stringent security, and continuous availability. The robust design and advanced features ensure reliable operation in environments where network downtime can have significant consequences.

Benefits of Choosing Cisco C9300-48UB-A

Enhanced Network Security

With its built-in security features, including AES-256 encryption and role-based access control, the switch provides comprehensive protection against cyber threats.

Seamless Scalability

Organizations can expand their network infrastructure by stacking multiple C9300 switches, ensuring that they can handle increasing connectivity demands.

Industry-Leading Reliability

With redundant power supplies, hot-swappable components, and enterprise-grade performance, the Cisco C9300-48UB-A is designed for mission-critical applications.