Re: ECN: Clearing the air (fwd)

Andi Kleen
2001-01-29T15:27:21Z

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.

-Andi