Subject: Re: PMTUD blackhole detection
To: Darren Reed <>
From: None <>
List: tech-net
Date: 05/01/2001 18:53:05
>> 	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 ?

	i guess there's no interaction with icmp host unreachables, because of
	the content of tcp_notify - correct me if i'm wrong.

	the blackhole detection check is in tcp_timers(), TCPT_REXMT case.
	(code speaks better than my english)