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  • STP and Graph Theory

    October 17, 2018 by

    Spanning Tree Protocol (STP) is one of several methods of avoiding loops in bridged local area networks. For most of us, working with the typical corporate LAN, STP is the default configuration of switches and it just works. But it may not always be the most efficient way to connect switches. This post looks at exactly what a spanning tree is, why it is used to solve the problem of loops in a network, and why it may not always be the most efficient way to do that.

  • The Troubleshooting Process

    October 5, 2018 by

    I do a lot of troubleshooting of problems in corporate infrastructure. By that, I mean investigating difficult technical problems in a structured way to find either a solution or a workaround. This post is a few thoughts on the process.

  • IEEE 802.1Q Bridges and Bridged Networks

    September 25, 2018 by

    I have been working recently on the design for an industrial network. The network runs through a physical tunnel, and so requires a ring topology to provide resilience against failure. Because the network may incorporate switches from different vendors I decided to read the current standard for this, the IEEE standard 802.1Q – 2014. This blog post aims to break down the idea of a bridged network to the lowest level, to reflect accurately what is in the standard.

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