C1000-48PP-4G-L Cisco 48 Ports Ethernet Switch

Core Architecture and Performance Specifications

At its heart, the C1000-48PP-4G-L is built for performance and resilience. Understanding its core specifications is key to evaluating its fit for your network infrastructure.

Port Configuration and Uplink Strategy

The switch's port layout is a primary driver of its utility. It offers a balanced design that caters to both access layer device connectivity and uplink capacity.

48 PoE+ Ethernet Ports

All 48 RJ-45 ports support 10/100/1000 Mbps (Gigabit Ethernet) connectivity and are equipped with IEEE 802.3at PoE+ capability. This allows each port to deliver up to 30 watts of power, enabling the simultaneous operation of power-hungry devices like next-generation wireless APs (such as Cisco 802.11ac or ax models), pan-tilt-zoom cameras, and video conferencing systems without the need for individual power supplies at the endpoint location.

4 Dedicated 1G SFP Uplink Ports

The integrated four 1 Gigabit Small Form-Factor Pluggable (SFP) ports provide flexible and reliable uplink options. Network administrators can choose between SFP modules for fiber connectivity (enabling long-distance runs to a core switch or server) or copper SFP modules for twisted-pair connections. This flexibility supports diverse cabling infrastructures and facilitates high-bandwidth aggregation links.

Power over Ethernet (PoE) Capabilities

The "PP" in the model number signifies its substantial PoE power supply, making it an ideal choice for converged networks.

Total PoE Power Budget

The switch is equipped with a robust power supply that provides a total PoE budget of 740 watts. This high budget ensures that even with all 48 ports populated with PoE devices, the switch can allocate power intelligently based on device requirements and priority settings, preventing overload scenarios.

Cisco Universal PoE (UPoE) Support

While standard PoE+ delivers up to 30W, the C1000-48PP-4G-L also supports Cisco's Universal PoE on specific ports, which can provide up to 60 watts (802.3bt Class 6). This forward-thinking capability allows the switch to power emerging high-wattage devices like advanced digital signage, thin clients, or building automation systems, protecting your investment against future technology upgrades.

Advanced Feature Set for Modern Networks

Beyond basic connectivity, the C1000 series is packed with features that enhance security, simplify management, and optimize traffic flow.

Enhanced Security and Access Control

In an era of increasing cyber threats, built-in security features are non-negotiable. This switch provides multiple layers of network protection.

Port Security and IEEE 802.1X Authentication

The switch supports IEEE 802.1X for network access control, allowing for user and device authentication against a central RADIUS server. This ensures only authorized endpoints can gain network access. Coupled with MACsec (Media Access Control Security) 128-bit encryption on certain models, it can secure data on the wire between switches and endpoints.

ACL, DHCP Snooping, and IP Source Guard

Advanced security controls include Access Control Lists (ACLs) for granular traffic filtering, DHCP Snooping to prevent rogue DHCP server attacks, and IP Source Guard to block IP address spoofing. These features work in tandem to create a hardened access layer.

Quality of Service (QoS) and Traffic Management

To ensure critical applications like voice and video receive priority, the switch offers sophisticated QoS mechanisms.

Classification, Marking, and Queuing

It supports DSCP and CoS-based classification and marking, allowing traffic to be prioritized as it enters the network. With four hardware queues per port, the switch can schedule and forward latency-sensitive traffic (e.g., VoIP) ahead of less time-critical data, minimizing jitter and delay.

Manageability and Operational Efficiency

Cisco provides a range of management options to suit different IT skill levels and operational preferences.

Cisco DNA Center and Smart Managed Features

While a full Cisco DNA Center license enables centralized, intent-based networking for large deployments, the switch also includes "Smart Managed" capabilities. These include a web-based graphical interface (GUI), a command-line interface (CLI) for granular control, and SNMP support for integration into existing network management systems.

Energy Efficiency Features

The switch incorporates Cisco's EnergyWise technology, which can dynamically control power consumption on ports based on device usage and policies. This not only reduces operational costs but also supports corporate sustainability goals.

Ideal Deployment Scenarios and Use Cases

The versatility of the Cisco C1000-48PP-4G-L makes it suitable for a wide array of environments where dense Gigabit access and PoE are required.

Modern Workspace and Collaboration Hubs

In office environments, the switch seamlessly supports the digital workplace.

Unified Communications Deployment

It can power and connect a full suite of collaboration tools: Cisco IP phones, Cisco TelePresence units, and wireless access points that enable video conferencing and mobile collaboration, ensuring all traffic is properly prioritized for a high-quality user experience.

Secure and Intelligent Campus Networks

For educational institutions or corporate campuses, the switch provides the connectivity backbone.

High-Density Wireless and IoT Integration

With the proliferation of Wi-Fi 6/6E access points and IoT sensors for smart buildings, the switch's high PoE budget and port density are essential. It can power dozens of APs and IoT gateways, providing the connectivity layer for a seamless digital experience and operational intelligence.

Comparison and Considerations Within the C1000 Family

Selecting the right Catalyst 1000 switch requires understanding the differences between models. The C1000-48PP-4G-L occupies a specific position in the portfolio.

Key Differentiators from Other Models

Compared to the 24-port version (C1000-24P-4G-L), this model offers twice the port density, ideal for larger deployments. Versus non-PoE models (like the C1000-48-4G-L), it adds the critical power delivery function. The "4G-L" suffix indicates four Gigabit SFP uplinks, providing more uplink bandwidth and redundancy than models with only two uplink ports.

Stacking and Scalability Options

While the Catalyst 1000 series does not support traditional stacking cables, it offers flexible scalability through uplink aggregation and centralized management via Cisco DNA Center or the built-in GUI/CLI, allowing for consistent policy deployment across multiple switches.