The ‘Cisco switch’ Archives
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Cisco Switch: 802.1q Trunk to Router (a.k.a. Router-on-a-Stick)

You can connect a Cisco switch and router via 802.1q trunking. This configuration is known as a router-on-a-stick.

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Disable or Turn Off CDP on Cisco Switches

Cisco Discover Protocol or CDP is a Cisco-proprietary protocol that runs on all Cisco products. CDP allows devices to learn about neighboring devices (the ones attached directly to the switch) including information about their platform, IP address, the version of IOS or other OS, VLAN membership, etc. This can be helpful information when troubleshooting network […]

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Cisco 2950 Switch: Create a VLAN

The commands for creating a VLAN vary from one switch model to another. VLANs in a 2950 switch are configured in a manner similar to configuring an interface. This configuration is substantially different than a 2900 switch.

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Cisco 2900 Switch: Create a VLAN

A VLAN (Virtual Local Area Network) makes a single physical switch behave like several separate switches. A host connected to one VLAN cannot communicate through the switch to a host connected to another (although a router can permit communication between VLANs, if desired). Here is how to configure a new VLAN on a 2900 switch.

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Cisco Switch 2900/2950: Display VLAN Information

Knowing the commands to display configuration information about Virtual LANs (VLANs) is as important as knowing the commands to configure them. The commands here display information about all VLANs or a single VLAN by number or name.

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Cisco 2950 Switch Password Recovery

This tutorial documents the procedure for performing a password recovery on a Cisco 2950 switch (and probably other models, as well).

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RSPAN Using CatOS

This guide can be useful if you need to configure the RSPAN session on your Catalyst 6500. In this example, we will see how to monitor more than one VLAN using the RSPAN VLAN. RSPAN has all the features of SPAN plus support for source ports and destination ports distributed across multiple switches. This allows […]

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How to Determine to Which Switch and Port You Are Connected

Sometimes you need to know to which switch and port you are connected. I work for a community college with hundreds of switches. Here is a method I have found to work well.

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Cisco 2950 Switch: Remove Port from a VLAN

Removing a port from a VLAN on a Cisco 2950 switch is a simple operation. Follow the steps in this simple Tech-Recipe.

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Configuring a Root Switch on IOS Based Cisco Switches

When you use spanning tree, a root switch is designated for you. However, knowing the location of the root switch makes troubleshooting a switched network much easier. Furthermore, by “manually setting” a root switch, you can use your most powerfull switch to become the root.

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How to Configure Multiple Cisco Switch Ports at the Same Time

Using the interface range command will save you time when configuring multiple ports with the same characteristics.

Category Cisco switch