What is PIM (Protocol Independent Multicast)?

Introduction PIM (Protocol Independent Multicast) is a multicast routing protocol, that is used to send traffic from a single source to multiple destinations across a network. PIM is a collection of three protocols - PIM Sparse Mode, PIM Dense Mode and PIM Bi-directional .  PIM is termed protocol-independent because PIM…

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What is BFD?

TL;DR BFD (Bi-Directional Forwarding Detection) is a highly efficient keepalive mechanism for routing protocols, that can detect link failures in milliseconds. Background As stated at http://brbccie.blogspot.com/, All routing protocols have some way of detecting failure, usually timer-related. Tuning the timers can theoretically get you sub-second failure…

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What is Segment Routing?

Introduction Within this article, we answer the question - What is Segment Routing (SR)? But before we do we should first review MPLS, to understand the key benefits that SR brings. Let's go... MPLS Before looking at segment routing it's good to understand traditional MPLS. With traditional MPLS, a component…

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A Beginners Guide to MPLS

Introduction Within this article, we will look into the basics of MPLS. To understand the need for MPLS, let us first review the process of IP packet forwarding. IP Packet Process When a router needs to forward a packet to another router, there are 3 basic steps: The router looks…

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