Category: Tags

Networking Fundamentals

I firmly believe that you cannot be a good networking engineer1 without a firm grasp of the networking fundamentals, and I couldn’t resist pointing that out a few times (see also certifications-related posts):

Regardless of how far down this page you’ll get, these blog posts are a must-read:

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OSPF

OSPF is like a traffic director for the internet. Imagine a city with many roads - OSPF helps routers (the traffic directors) figure out the best paths for data to travel from one place to another. It’s like a smart GPS for computers, making sure information takes the shortest and fastest routes. OSPF routers talk to each other, share maps of the internet, and decide the best ways to send data. It’s a cool system that keeps the internet running smoothly!

ChatGPT explaining OSPF to a high-school kid

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SRv6

Segment Routing over IPv6 (SRv6) is mostly a solution in search of a problem, reimplementing source routing with various forms of IPv6 extension headers. Not surprisingly, its vocal proponents sell it as the ultimate solution to all networking problems.

Is It Useful?

Is it useful to have yet another tunneling mechanism with source routing capabilities? Here are a few thoughts:

No, It Is Not

Quite a few people (myself included) came to the conclusion that SRv6 makes little sense:

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