There are no items in your cart
Add More
Add More
| Item Details | Price | ||
|---|---|---|---|
Created by - Vishnu Dutt
English and Hindi
Most YouTube tutorials treat it as "OSPF with different names." The books throw NSAP addresses at you in the first ten minutes. And the moment you open Hindi content, the technical clarity disappears. This package fixes all three problems at once. You get IS-IS from Scratch in Hindi and in English, bundled together at one price, taught with the same why first method that has already helped 15000+ learners across 100+ countries.
it is the routing engine underneath MPLS and Segment Routing in most Tier 1 networks, and yet it is the protocol that gets the least beginner friendly explanation online. The reason is history. IS-IS was born in the OSI world for CLNS routing, and by the time TCP and IP won, IS-IS had already been adopted by carriers who did not want to change their working networks. Because it runs directly on Layer 2 and carries information inside TLVs (Type Length Value fields), it is protocol independent and easily extensible. That is exactly the reason it survived. And that is exactly the reason your instructor starts every lesson with the why, before touching a single command.
you will move from "I have never seen IS-IS" to "I can build it, break it, capture it in Wireshark and explain it to my team." You will start with the origin story of the protocol so that TLVs and NSAP addresses stop feeling arbitrary. You will build adjacency step by step on the whiteboard first, then in EVE-NG on real Cisco images. You will see how flooding actually works, why CSNPs and PSNPs exist, and how Level 1 and Level 2 routers cooperate to make IS-IS scale in ways OSPF struggles with. By Lesson 6 you will be configuring metrics, redistributing between protocols safely, and watching the Dijkstra algorithm pick the same path you drew on paper.
Because language should not be a barrier to becoming excellent at networking. If your first language is Hindi, you should learn IS-IS in Hindi. If your work language is English, you should learn IS-IS in English. And if you switch between both during the day, you should be able to switch between both while learning. That is what this bundle is built for. You buy once. You watch in whichever language feels right for that lesson. Some topics land faster in Hindi. Some are cleaner in English. You decide, lesson by lesson.
Before any configuration appears on screen, the concept is explained on a whiteboard with analogies drawn from things you already understand. Why did the designers of IS-IS choose TLVs instead of fixed fields? Because they wanted the protocol to survive future changes without a rewrite. Why do IS-IS routers sit in one area only, unlike OSPF where areas cross the router? Because IS-IS was designed for hierarchical service provider networks where the boundary belongs on the link, not the box. Once you understand the mind of the designer, every command starts to make sense.
You will spin up Cisco IOL or CSR routers inside EVE-NG, build a multi area topology, and confirm each stage of adjacency by reading the raw packets in Wireshark. You will see Hello PDUs, LSPs, CSNPs, PSNPs and the DIS election happen on a broadcast segment. You will trace the exact route a packet takes and reason about it before running any show command. This is the difference between passing an exam and being useful on a real network.
Here is know your instructor "I spent 18 years building computer networks at Cisco. But honestly, I am more curious than technical. I read. I listen to podcasts. I follow finance, health, and whatever new trend is quietly changing the world before most people notice. That curiosity is why I teach the way I do. I never start with "how." I always start with "why." Because if you understand why something exists, the how becomes easy. Right now, that curiosity brought me here. To help people understand what AI is really doing to jobs and careers. Before it is too late."
View ProfileWhat is IS-IS and where is it used in the real world?
IS-IS is a link state routing protocol. It is used mostly by large service providers and internet exchange points, and it forms the underlay for MPLS and Segment Routing in most Tier 1 carrier networks. If you plan to work in a service provider, telecom, or hyperscale data center environment, IS-IS is often the protocol you will touch every day.
How is IS-IS different from OSPF?
Both are link state and both run Dijkstra. But IS-IS runs directly on Layer 2 while OSPF runs on top of IP. IS-IS carries information in flexible TLVs so it extends easily without protocol changes. IS-IS also places areas on links, not on routers. Because of these design choices, IS-IS tends to scale more comfortably in very large networks.
Is any prior course required before starting IS-IS from Scratch?
No prerequisite is required. Basic knowledge of IP routing is helpful. If you feel unsure, take Routing Fundamentals or the CCNA course alongside this one.
Is this course in Hindi or English?
This is the package that gives you both. You get the full Hindi version and the full English version at one bundled price. You can switch between them for each lesson depending on which explanation feels clearer to you.
Why should I choose the package instead of only the English or only the Hindi version?
Because the package costs less than buying both separately, and many learners find that some concepts click faster in one language and other concepts click faster in the other. Having both removes that limitation.
What labs are used?
EVE-NG for building the topology and Wireshark for capturing and reading the raw IS-IS packets. You will see Hello PDUs, LSPs, CSNPs and PSNPs on the wire and understand what each byte is doing.
Do I need to buy EVE-NG separately?
The community edition of EVE-NG is free. You will need router images from Cisco or another vendor, and guidance is provided on how learners typically set up their home labs. You can run everything on a laptop with 8 GB of RAM.
Will this course help me clear CCIE or CCNP exams?
Yes. IS-IS appears in CCNP ENARSI and is heavily tested in CCIE Enterprise Infrastructure and CCIE Service Provider. The why first depth here goes past command memorisation and prepares you for scenario based questions.
Is there a completion certificate?
You receive a completion certificate from BridgeWhy once you finish the course.
Will this help me in interviews?
Very much. IS-IS questions are common for network engineer, senior network engineer and service provider roles. Pair this course with Interview Preparation Series for full readiness.
What is the teaching style?
Why first. Every concept starts with the problem it solves, then moves to whiteboarding, then to analogies, then to configuration. No command is shown before you understand why it is needed.
How long do I get access to the material?
Access length depends on the plan you choose. Compare 3 Months Access, 1 Year Access and Lifetime Access and pick what suits your pace.
Can I watch on mobile?
Yes. The BridgeWhy platform works on desktop, tablet and mobile. Many learners watch theory lessons on mobile and switch to a laptop only for labs.
Will you cover MPLS in this course?
No. MPLS is covered in depth in MPLS from Scratch. This IS-IS course focuses purely on IS-IS so you understand the underlay before you move to labels.
Will you cover Segment Routing?
Not in this course. This course builds the IS-IS foundation. Segment Routing extensions to IS-IS are taught separately when they are available in the catalog.
What if I get stuck on a lab?
Every lesson has a discussion area. You can ask questions and Vishnu or another learner will respond. You are not learning alone.
Do I need Cisco hardware at home?
Everything runs in EVE-NG on your laptop. You do not need physical routers.
Who is Vishnu Dutt?
The instructor. He spent 19+ years at Cisco and has taught 15000+ learners across 100+ countries. You can read more on the About Us page.
What should I take after IS-IS from Scratch?
The natural next step depends on your goal. For service provider work, take BGP from Scratch and then MPLS from Scratch. For enterprise transformation, SD-WAN from Scratch is a strong follow up. For data center, VXLAN with BGP-EVPN is the direction.
Is there a free course I can try before I buy?
Yes. SD-Access is available free on BridgeWhy so you can experience the teaching style.
Can I get a refund if the course does not suit me?
Refund policy is listed on the checkout page and in the terms. Please review it there before purchase.
Will there be new lessons added later?
Content is refreshed as the protocol evolves and as learner feedback comes in. Any additions become available to existing learners on the same plan.
Do I need to be a Cisco engineer to benefit from this course?
No. IS-IS is standard across vendors. The concepts you learn here apply to Juniper, Nokia, Arista and Huawei implementations. Configuration syntax differs, but the protocol behaviour does not.
How do I contact the instructor for a specific doubt?
Use the discussion area in the course. For general enquiries, contact through the BridgeWhy store page.
What makes BridgeWhy different from other training platforms?
Two things. First, every course is taught by an instructor with 19+ years of real experience at Cisco. Second, the why first method means you understand the design, not just the commands. That difference shows up on the job and in interviews.
