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    SubjectRe: ECN: Clearing the air (fwd)
    On Sun, Jan 28, 2001 at 11:32:41PM -0800, David S. Miller wrote:
    > James Sutherland writes:
    > > Except you can detect and deal with these "PMTU black holes". Just as you
    > > should detect and deal with ECN black holes. Maybe an ideal Internet
    > > wouldn't have them, but this one does. If you can find an ideal Internet,
    > > go code for it: until then, stick with the real one. It's all we've got.
    > Guess what, Linux works not around PMTU black holes either for the
    > same exact reason we will not work around ECN.

    Actually PMTU black hole detection is very hard. I tried to implement it, but
    failed to make it not do bad things occasionally.

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