The biggest problem with Layer 2 switches is that while they can support the creation of multiple VLAN, Layer 2 switches are unable to route packets between VLANs – a process known as InterVLAN routing. Take for example the popular Catalyst Cisco 2960 series switches – these Layer 2 switches provide a healthy amount of features in speed, functionality and security, leaving very little to be desired even in very demanding network environments. Layer 2 Switching LimitationsĬisco's portfolio of catalyst switches is designed to meet any network requirement (in speed, capacity, expandability and security) from small companies up to very large enterprises. Configuring Network Time Protocol (NTP) - Understanding Why NTP is EssentialĬonfiguration commands covered in this article are applicable to all Cisco Catalyst Layer 3 switches.Configuring Virtual Trunk Protocol (VTP) Server. Configuring & Securing Access & Trunk Links Against VLAN Hopping.VLAN Security: Moving Ports (interfaces) off the Management VLAN (VLAN1).Enable InterVLAN Routing (SVI - ip routing) and Configuring Default Gateway.Creating, Configuring and Verifying VLANs.IOS License Requirements for InterVLAN Routing/ SVI IP Routing.The topics covered in this article include: In many cases, these Catalyst Layer 3 switches are purchase and installed with basic configuration or features enabled, without leveraging their layer 3 capabilities.Īfter observing many installations that fell into this category (almost out of the box configurations), we decided it was a great idea to begin covering configuration best-practices that will help engineers understand the capabilities of this equipment and better adapt configurations to their company needs.īy correctly leveraging the capabilities offered by any Cisco Catalyst Layer 3 switch we can create a solid network backbone with high security standards that will have the necessary flexibility to ensure the smooth operation of our network. This article covers basic and advanced configuration of Cisco Catalyst Layer 3 switches such as the Cisco Catalyst 3560G, 3560E, 3560-X, 3750, 3750E, 3750-X, 38 series, and extends to include the configuration of additional features considered important to the secure and correct operation of these devices.
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