Subject: Re: PMTUD blackhole detection
To: None <email@example.com>
From: Darren Reed <firstname.lastname@example.org>
Date: 05/01/2001 19:45:15
In some email I received from email@example.com, sie wrote:
> >> on PR 12790, I posted a simple patch for TCP PMTUD blackhole detection.
> >> if there's no ack for a while, the patch will do the following:
> >What if there is no ACK, but ICMP unreachable errors that are not
> >"need fragmentation" - will they reset the timer (I think they should) ?
> i did not change that part of the codepath. icmp unreachables will
> be counted, and if the count reaches maximum, the connection will
> be terminated.
That's not what I was asking.
What I meant was, if you are waiting at most time X for an ACK before
disabling PMTU, if you get an ICMP host unreachable at X/2, will PMTU
still be disabled after time X or will it wait until time X + X/2 ?