In our BGP Best Path Selection series, we have gradually explored how BGP makes its routing decisions step by step. So far, we’ve covered the major attributes that influence the path selection — starting from the top of the list: Now that all the major decision points are done, we have reached the final stage … Read more
Understanding VTP Versions and Modes: A Complete Guide for Network Engineers Managing VLANs across multiple switches can be challenging, especially in large networks. Cisco’s VLAN Trunking Protocol (VTP) simplifies VLAN management by sharing VLAN configuration information across switches. To use VTP effectively, you need to understand VTP versions and VTP modes, which define how switches … Read more
Understanding VTP (VLAN Trunking Protocol): The Backbone of VLAN Management Introduction Imagine you’re managing a large campus network with dozens of switches, each supporting multiple VLANs.Now, think about the amount of manual work required to create or delete VLANs on every single switch one by one.Sounds exhausting, right? This is where VTP (VLAN Trunking Protocol) … Read more
When devices communicate in a computer network, they need a way to send and receive data. The method of communication between two devices is called the transmission mode. Think of it like a road: some roads allow traffic in one direction only, while others allow traffic both ways. In networking, there are three main transmission … Read more
Learn the difference between collision domain and broadcast domain in computer networks. Understand how hubs, switches, and routers handle them with easy examples for beginners. When we talk about computer networks, two important concepts often come up – collision domain and broadcast domain. These terms might sound technical, but once you break them down, they … Read more
Learn how the BGP MED (Multi-Exit Discriminator) attribute influences path selection in multi-homed networks. Understand its configuration, verification, and impact on inbound traffic for optimized routing. In the previous blogs, we explored several BGP path selection attributes such as Weight, Local Preference, Locally Originated, AS Path Length, and Origin Code. Moving forward in the selection … Read more
Explore how BGP Origin Code influences path selection in routing decisions. Learn the differences between IGP, EGP, and Incomplete origins with configuration examples, verification outputs, common mistakes, and interview questions for a clear understanding of this BGP attribute. When we dive into BGP path selection, it’s all about how routers decide the best path when … Read more
Learn how the BGP AS-Path attribute influences path selection, prevents routing loops, and helps control inbound traffic using AS-Path prepending. Simple examples and configurations included. In our previous blogs, we started exploring how BGP (Border Gateway Protocol) decides the “best path” when multiple routes are available. We first looked at the Weight attribute, then the … Read more
Understanding BGP Route Reflectors: Simplifying iBGP Full Mesh A detailed guide to BGP Route Reflectors—learn how they simplify iBGP full mesh, key reflection rules, configuration steps, loop prevention with Originator-ID and Cluster-ID, plus advantages and best practices for scalable and resilient network design. The Border Gateway Protocol (BGP) is the backbone of the internet, responsible … Read more
Learn how BGP AS-Override resolves routing issues when customer sites use the same AS number in MPLS VPNs. Step-by-step lab guide with configs and verification. In the last blog on BGP Loop Prevention, we deeply explored how the BGP routing protocol avoids routing loops using its AS Path attribute. (If you missed it, Click here … Read more