Practical networking guides, honest career-change notes and the occasional packet-shaped joke.
I’m Cecilia: network engineer, consultant and career changer. This is a place to make OSPF click, with useful explanations and enough humour to remember them.
Learn OSPF from the first Hello. Meet the LSA family. Test yourself in Play, or grab a printable from Free Stuff.
OSPF explained with dating, gossip, Mr. Krabs and memes. We go from Hello packets and neighbors to LSA1, LSA2, cost and classless routing. Because apparently this is how my brain remembers networking. Enjoy <3
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Start with reachability, interface settings and neighbor state before blaming the entire protocol.
Read guide →The backbone, an area border and an external route are three different ideas. Here is how they fit together.
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ASBR reachabilityNetworking, in both senses of the word.
DR / BDRSome neighbors do not need a deeper relationship.
Adjacency troubleshootingThe topology was cute. The database exchange had questions.