Cisco IOS Software Modularity is available for the two newest Supervisor modules, the Sup720 and Sup32,  which go into the Cisco 6500 series platform.  Basically, by using the modular IOS, the switch runs more efficiently.  This is accomplished by splitting up major components inside the IOS into separate subsystems, which will run in different processes. [...]

The most important element to spanning tree is the root bridge placement. If no other element of spanning tree is manually configured on your network, the root bridge should definitely be set.

There are many choices when trying to decide which version of spanning tree to implement in your network. This article will attempt to explain the different options and when to use each.

Trying to figure out why multicast doesn’t work across a flat network that consist of multiple switches? This article contains the resolution to that broken Windows server cluster or the Nokia/Checkpoint cluster that doesn’t work.

This article will focus on upgrading software on a Cisco 3750 switch stack comprised of two switches. There are procedures for upgrading one of the access switches and then letting the stack manage the distribution/installation of software on the other switches. However, there is some comfort to doing it all manually and checking things after each step.

Many times a network engineer needs to quickly find where a particular host is plugged into the network. This article explains how to accomplish this using a manual discovery process that can be performed rather quickly,

Smartports macros provide a way to save and share common switch port configurations. You can use Smartports macros for repetitive configuration tasks, such as setting up interfaces for use with a particular type of system. Even for seasoned professionals, macros offer advantages such as consistent configuration.

This article contains notes on Cisco Catalyst 3750 switch stack operation. Listed are quick references to useful commands when administering this model of switch.

This article will walk through the configuration steps of setting up an 802.1q trunk port between a Cisco access switch and a 3com SuperStack III access switch.

Stop managing Cisco devices with the default Vlan1. This article will explain why to change this in your network, and how to perform the configuration.