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Amazing debugging, I loved reading that. HN doesn't get enough good posts like this anymore :)

If https://github.com/pion/sctp/issues/12 had happened (not just in Pion but across all implementations) this could have been fixed years ago. The hardcoding we all settle for is tragic.

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Author here, thank you, that means a lot coming from you. Pion was the prior art I pointed the webrtc-rs maintainers at. And pion/sctp#12 is super relevant. A known, proposed fix years before we hit it.

"The hardcoding we all settle for" might be the epigraph for the whole incident. webrtc-rs invited a PR for the configurable-MTU + better default half [webrtc-rs/webrtc#806] to unblock folks today. Whether PMTUD gets implemented will be interesting to see.

The debugging was interesting. I'm just going to have to learn to live with this I feel like, but the very LLM-ish language in the blog post was kind of annoying.

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