Configuring Inter−VLAN Routing with Catalyst 3750 Series Switches in a Stacked Configuration

Document ID: 45002

Introduction

Before You Begin

Conventions

Prerequisites

Components Used

Background Theory

IP Routing on a Stack of 3750s

Related Products

Configure

Network Diagram

Practical Tips

Configurations

Verify

Troubleshoot

Troubleshooting Procedure

Related Information

Introduction

This document provides a sample configuration for inter−VLAN routing using two Catalyst 3750s series switches stacked together running EMI software in a typical network scenario. The document uses a Catalyst 2950 series switch and a Catalyst 2948G switch as Layer 2 (L2) closet switches connecting to the stack of Catalyst 3750s. The stack of Catalyst 3750s is also configured for a default route for all traffic going to the Internet with the next hop pointing to a Cisco 7200VXR router, which can be substituted by a firewall or other routers. Configuring inter−VLAN routing on a single 3750 is the same as configuring this feature on a Catalyst 3550 series switch. For information on configuring inter−VLAN routing on a single Catalyst 3750 series switch, refer to Configuring Inter−VLAN Routing with Catalyst 3550 Series Switches.

Before You Begin

Conventions

For more information on document conventions, see the Cisco Technical Tips Conventions.

Prerequisites

Before attempting this configuration, please ensure that you meet the following prerequisites:

knowledge of creating VLANs; for more information, refer to Creating Ethernet VLANs on Catalyst Switches

knowledge of creating VLAN trunks; for more information, refer to the Configuring VLAN Trunking section of Configuring VLANs

Cisco − Configuring Inter−VLAN Routing with Catalyst 3750 Series Switches in a Stacked Configuration

Page 2
Image 2
Cisco Systems 3750 manual Introduction, Before You Begin, Document ID, Conventions, Prerequisites

3750 specifications

The Cisco Systems 3750 series is a family of enterprise-class stackable switches that were designed to provide high-performance networking solutions for organizations requiring robust management features, security, and scalability. Known for their reliability and advanced capabilities, the 3750 series is particularly aimed at accommodating the demands of LAN environments in organizations ranging from small businesses to large enterprises.

One of the defining features of the Cisco 3750 series is its StackWise technology. This innovative feature enables the stacking of up to nine switches together, allowing them to function as a single logical unit. This results in simplified management, higher redundancy, and increased scalability. The StackWise technology allows for seamless failover and enhanced bandwidth between the stacked switches.

In terms of performance, the 3750 series supports Layer 2 and Layer 3 switching, offering routing capabilities to handle both traditional and modern network demands. It is equipped with advanced Quality of Service (QoS) features, ensuring that critical applications such as voice and video are prioritized for optimal performance.

The Cisco 3750 also features extensive security capabilities. It incorporates features such as IEEE 802.1X authentication, DHCP snooping, and dynamic ARP inspection to protect against unauthorized access and various network attacks. These enhancements help maintain data integrity and secure communications across the network.

Another noteworthy characteristic of the 3750 series is its support for Power over Ethernet (PoE). PoE allows for the delivery of power over Ethernet cables to connected devices, such as IP phones and wireless access points, facilitating simpler installations and reducing the need for additional power outlets.

The Cisco 3750 series also provides a comprehensive set of management tools. With features like Cisco's Embedded Event Manager (EEM) and extensive SNMP support, network administrators can efficiently monitor and manage network performance, troubleshoot issues, and maintain high availability.

Additionally, the series is compatible with Cisco's IOS software, which provides a rich set of features, including advanced routing protocols, multicast support, and extensive security options, further enhancing the functionality and versatility of the switches.

Overall, the Cisco Systems 3750 series stands out for its stackable design, high-performance features, security capabilities, and management tools, making it a popular choice for organizations looking for dependable and scalable networking solutions.