All Switching related topics will come under this category.
A Spanning Tree Protocol or STP is a layer2 protocol used to prevent loops in a network by ensuring that a single path exists between any two nodes in the network. In this blog post, I will explain the Spanning…
EtherChannels boost network bandwidth, redundancy, and load balancing. This article covers what EtherChannels are, their significance, how they function, various types and modes, a configuration example, best practices, and troubleshooting.
If you are a network administrator, then you should know that managing VLANs can be time-consuming and prone to mistakes in large networks with numerous interconnected switches. The VLAN Trunking Protocol (VTP) lets you manage your VLANs from a central…
Understand VLAN tagged vs untagged in plain language. We clarify access vs trunk ports, correct 802.1Q tag fields (PCP/DEI/VID), native vs default VLAN, and modern configuration best practices.
A clear, accurate guide to VLANs and Private VLANs (PVLANs)—how they work, when to use them, and the essential security and configuration details you need.
Spanning Tree Protocol (STP) remains a critical Layer 2 defense mechanism, even in the age of advanced network fabrics. The STP Root Guard feature is an indispensable tool for preventing rogue switches from becoming the root bridge, thus maintaining network…
While much of the networking world has shifted towards automation and API-driven recovery, there are still situations where understanding fundamental device recovery procedures is critical. This guide, originally published in 2011 and updated in 2021, focuses on the console-based recovery…
Ah, 802.1X authentication – a true veteran in network security, often affectionately (or sometimes exasperatedly) known as Dot1x. I remember configuring my first Dot1x setup way back in the day, and it felt like unlocking a new level of control…
A modern, multi‑vendor look at QinQ (802.1ad): correct TPIDs, MTU sizing, L2 protocol handling, and automated deployment at scale.
Hi guys! I’m back, and as always, it’s great to connect. Life, as a network engineer, often pulls us into deep dives and complex projects, but I always make it a point to share what I learn. Today, we’re revisiting…