SM-X-ES3D-48-P Cisco Managed Switch 48 Ports Ethernet Service Module

Enterprise-Class Ethernet Switch Module Overview

The Cisco SM-X-ES3D-48-P is a high-density Ethernet switch module engineered for scalable and reliable enterprise networking. Designed to integrate seamlessly with supported Cisco Integrated Services Routers, this module delivers consistent performance, centralized management, and advanced traffic control.

Product Identity and Classification

• Brand: Cisco
• Model / SKU: SM-X-ES3D-48-P
• Category: Managed Switch Module
• Port Density: 48 Ethernet Ports

Switch Architecture and Ethernet Technology

Built on Gigabit Ethernet standards, this service module ensures stable data flow across connected devices. It supports twisted pair cabling, making it suitable for structured enterprise cabling environments.

Supported Network Media

• Twisted Pair Ethernet cabling
• Optimized for copper-based LAN deployments

Port Layout and Expansion Capabilities

The module features a flexible port configuration that supports both high-volume connectivity and future scalability.

Physical and Logical Port Configuration

• Total Ethernet Ports: 48
• Connector Type: RJ-45
• LAN Standard: 10/100/1000Base-T
• Power over Ethernet Plus (PoE+) support

Expansion Slot Details

• Number of Expansion Slots: 2
• Expansion Interface Type: SFP (mini-GBIC)
• Enables fiber uplinks or extended network reach

Interface and Connectivity Options

Each RJ-45 port supports auto-negotiation across multiple speeds, ensuring compatibility with a wide range of network devices while maintaining optimal throughput.

LAN Interface Specifications

• RJ-45 10/100/1000Base-T Ethernet
• PoE+ enabled for powering compatible devices
• Designed for high-availability enterprise LANs

Performance and Throughput Characteristics

This Cisco switch module delivers reliable Gigabit performance across all ports, supporting bandwidth-intensive applications and consistent data transmission.

Data Transfer Capabilities

• Maximum Data Rate: 1 Gbps per port
• Gigabit Ethernet over twisted pair
• Efficient handling of simultaneous network traffic

Management, Control, and Network Protocols

Advanced management features allow administrators to monitor, configure, and optimize network performance with precision.

Supported Management Interfaces

• Command Line Interface (CLI) for direct configuration
• SNMP for centralized monitoring and alerts
• Quality of Service (QoS) for traffic prioritization

Physical Dimensions and Build Specifications

Compact and lightweight, the module is engineered to fit efficiently within compatible router platforms without compromising performance.

Size and Weight Details

• Height: 1.6 inches
• Width: 16.2 inches
• Depth: 8.1 inches
• Approximate Weight: 4.59 lbs

Router Compatibility and Deployment Options

The SM-X-ES3D-48-P is purpose-built for integration with select Cisco Integrated Services Routers, enabling unified routing and switching within a single platform.

Supported Cisco Router Series

• Cisco ISR 4451-X Series
• Cisco 2900 Series
• Cisco 3900 Series

Cisco SM-X-ES3D-48-P Service Module Ethernet Managed Switch

The Cisco SM-X-ES3D-48-P 48 Ports Service Module Ethernet Managed Switch belongs to a specialized category of embedded switching modules designed for Cisco Integrated Services Routers. This category focuses on service modules that deliver enterprise-grade Ethernet switching directly within a router chassis, eliminating the need for separate standalone switches while maintaining high levels of performance, scalability, and advanced network services. The SM-X-ES3D-48-P represents a powerful convergence of routing and switching, enabling organizations to simplify network architecture, reduce physical footprint, and centralize management without compromising on control or security.

This category is especially relevant for distributed branch offices, campus edge deployments, and remote enterprise environments where space efficiency, power optimization, and integrated management are critical. The Cisco SM-X-ES3D-48-P service module provides forty-eight Ethernet ports with Power over Ethernet support, allowing network administrators to connect and power a wide range of endpoint devices such as IP phones, wireless access points, security cameras, and IoT devices directly from the router-based switching fabric.

Integrated Switching Architecture within Cisco ISR Platforms

Service module Ethernet switches such as the Cisco SM-X-ES3D-48-P are engineered to integrate seamlessly into Cisco ISR platforms. This architectural category is defined by tight hardware and software integration, enabling the switching module to operate as an extension of the router’s control plane. Instead of managing a standalone switch and a router independently, administrators can leverage unified configuration, monitoring, and policy enforcement across both routing and switching functions.

The SM-X-ES3D-48-P uses Cisco’s Enhanced Services Module architecture, which is designed to deliver high throughput and low latency switching performance while sharing system resources intelligently with the host router. This category supports advanced features such as VLAN segmentation, inter-VLAN routing, quality of service enforcement, and security policies that align directly with enterprise network design standards. The result is a highly cohesive network environment that reduces operational complexity and improves consistency across deployments.

High Port Density for Enterprise Connectivity

The forty-eight port configuration of the Cisco SM-X-ES3D-48-P places it firmly within the high-density service module switching category. This design is ideal for branch offices or campus extensions that require a significant number of wired connections without adding additional rack-mounted equipment. Each Ethernet port supports enterprise-class connectivity, ensuring reliable data transmission for voice, video, and data applications.

High port density within a service module also supports network scalability. Organizations can accommodate growth in endpoint devices while maintaining a compact network footprint. This is particularly beneficial in environments where rack space is limited or where deploying multiple standalone switches would increase complexity and cost.

Power over Ethernet Capabilities and Device Enablement

One of the defining characteristics of the Cisco SM-X-ES3D-48-P service module category is integrated Power over Ethernet functionality. PoE capability allows the switch to deliver both data and electrical power over a single Ethernet cable, simplifying installation and reducing the need for external power sources at the device level. This category supports modern enterprise deployments that rely heavily on IP-based devices requiring consistent and reliable power.

With PoE support across all forty-eight ports, the SM-X-ES3D-48-P is well-suited for powering IP telephony systems, wireless access points, and security infrastructure. This capability enhances deployment flexibility and supports centralized power management, which can improve uptime and simplify troubleshooting. In addition, PoE-enabled service modules align with energy-efficient network strategies by allowing administrators to manage power usage dynamically.

Optimized for Voice and Unified Communications

Service module Ethernet switches in this category are designed to support real-time applications such as voice and video. The Cisco SM-X-ES3D-48-P includes advanced quality of service mechanisms that prioritize latency-sensitive traffic, ensuring clear voice calls and smooth video conferencing experiences. These capabilities are essential in unified communications environments where consistent performance directly impacts productivity and user satisfaction.

By integrating switching and routing within the same platform, the module enables end-to-end policy enforcement for voice traffic. This allows administrators to define and apply QoS rules that span from the access layer to the WAN, reducing jitter and packet loss while maintaining predictable application performance.

Advanced Layer 2 and Layer 3 Switching Features

The Cisco SM-X-ES3D-48-P falls into a category of managed service module switches that offer comprehensive Layer 2 and selective Layer 3 features. At the Layer 2 level, this category supports VLANs, trunking, spanning tree protocols, and link aggregation, enabling flexible and resilient network topologies. These features allow organizations to segment traffic, enhance redundancy, and optimize bandwidth utilization.

Layer 3 capabilities further enhance the value of this category by supporting inter-VLAN routing and dynamic traffic control within the service module. This reduces the need for external routing devices and improves performance by keeping traffic local whenever possible. The integration of Layer 2 and Layer 3 features within a single module simplifies network design while maintaining high levels of control.

VLAN Segmentation and Traffic Isolation

VLAN functionality is a core element of the service module Ethernet switch category. The Cisco SM-X-ES3D-48-P enables administrators to create multiple logical networks over the same physical infrastructure, improving security and performance. VLAN segmentation is particularly useful in enterprise environments where different departments, applications, or device types must be isolated from one another.

This capability supports compliance requirements and best practices by reducing the attack surface and limiting broadcast traffic. When combined with routing and security features on the host ISR platform, VLANs form the foundation of a robust and scalable enterprise network architecture.

Centralized Management and Cisco IOS Integration

A defining advantage of the Cisco SM-X-ES3D-48-P service module category is centralized management through Cisco IOS. Because the switch operates as part of the router ecosystem, administrators can manage switching functions using familiar Cisco command-line interfaces and management tools. This reduces the learning curve and ensures consistency across network devices.

Centralized management also supports automation and policy-based configuration. Network administrators can deploy standardized configurations across multiple branch locations, improving efficiency and reducing the risk of misconfiguration. Monitoring and troubleshooting are streamlined, as performance metrics and logs are accessible through a unified management framework.

Operational Efficiency and Reduced Complexity

By consolidating switching and routing into a single platform, the service module Ethernet switch category helps organizations reduce operational overhead. Fewer devices mean fewer firmware versions to manage, fewer cables to maintain, and fewer points of failure. This streamlined approach supports lean IT operations while maintaining enterprise-grade functionality.

The Cisco SM-X-ES3D-48-P exemplifies this efficiency by delivering robust switching capabilities without requiring additional rack space or power circuits. This is particularly valuable for branch offices and remote sites where IT resources may be limited.

Security Features and Network Protection

Security is a critical aspect of the managed service module switch category. The Cisco SM-X-ES3D-48-P supports a range of security features designed to protect the network at the access layer. These features include port security, access control lists, and integration with router-based security services.

By embedding switching within the router, organizations can enforce consistent security policies across both access and WAN connections. This integrated approach helps prevent unauthorized access, mitigate threats, and maintain compliance with organizational security standards.

Access Control and Policy Enforcement

Access control mechanisms within the service module category allow administrators to define which devices and users are permitted to connect to the network. The Cisco SM-X-ES3D-48-P supports granular policy enforcement that can be tailored to specific ports, VLANs, or traffic types.

This level of control is essential in modern enterprise environments where a wide variety of devices connect to the network. By enforcing policies at the access layer, organizations can reduce the risk of security breaches and ensure that network resources are used appropriately.

Performance, Reliability, and Enterprise Readiness

The Cisco SM-X-ES3D-48-P belongs to a category of service module switches engineered for enterprise performance and reliability. High throughput switching, low latency forwarding, and robust hardware design ensure consistent operation under demanding workloads. This makes the category suitable for mission-critical applications and high-density user environments.

Reliability is further enhanced through features such as redundancy support, intelligent power management, and tight integration with the host router’s monitoring capabilities. These attributes contribute to high availability and predictable performance, even in challenging network conditions.

Scalability for Growing Networks

Scalability is a key consideration in the service module Ethernet switch category. The Cisco SM-X-ES3D-48-P is designed to accommodate network growth by supporting additional endpoints, increased traffic volumes, and evolving application requirements. Its integration with Cisco ISR platforms ensures compatibility with a wide range of network services and future enhancements.

This scalability allows organizations to invest in a solution that grows with their needs, reducing the likelihood of costly hardware replacements. As network demands evolve, the service module can continue to deliver value within a flexible and adaptable architecture.

Use Cases Across Enterprise and Branch Environments

The Cisco SM-X-ES3D-48-P service module Ethernet managed switch category is well-suited for a variety of use cases. In branch offices, it enables compact and efficient network deployments that support voice, data, and wireless connectivity. In campus environments, it can serve as an access layer extension that integrates seamlessly with core routing infrastructure.

This versatility makes the category attractive to organizations seeking standardized solutions across multiple locations. By deploying the same service module architecture in different environments, enterprises can achieve consistency, simplify support, and reduce overall network complexity.

Support for Modern Enterprise Applications

Modern enterprise applications require reliable connectivity, low latency, and consistent performance. The Cisco SM-X-ES3D-48-P category is designed to meet these requirements by delivering advanced switching features and integrated services. Applications such as cloud access, collaboration tools, and real-time communications benefit from the optimized traffic handling and QoS capabilities of the service module.

As organizations continue to adopt digital transformation initiatives, the ability to support diverse and demanding applications becomes increasingly important. Service module Ethernet switches provide a strong foundation for these initiatives by combining flexibility, performance, and manageability.

Long-Term Value and Network Standardization

The Cisco SM-X-ES3D-48-P represents a category focused on long-term value and network standardization. By embedding switching functionality within a modular router platform, organizations can standardize their network designs and reduce variability across deployments. This approach simplifies training, support, and lifecycle management.

Service module Ethernet managed switches continue to play a vital role in enterprise networking strategies that prioritize integration, efficiency, and scalability. The Cisco SM-X-ES3D-48-P exemplifies the strengths of this category by delivering high port density, advanced features, and seamless integration within Cisco’s enterprise networking ecosystem.