Subject: Re: IP DF problems (again)
To: Jason Thorpe <email@example.com>
From: Kevin M. Lahey <firstname.lastname@example.org>
Date: 02/02/1998 15:26:20
In message <199802021906.LAA09162@lestat.nas.nasa.gov>Jason Thorpe writes
>On 2 Feb 1998 09:24:49 -0800
> Wolfgang Rupprecht <email@example.com> wrote:
> > BTW, NetBSD could do path-MTU discovery, but it is off by default.
>There are two reasons it is turned off by default:
> (1) No Black Hole Detection
There aren't alot of obvious ways to do this, but we'll try.
We can always crank down the MTU as we detect timed out packets;
we can't always depend on maintaining the same path during
the course of a connection, so we can't just be especially careful
when initiating a connection.
> (2) Currently, the routes added by the PMTU engine don't expire.
This is just a matter of writing some code, which I should do
Real Soon Now. I suspect that I can't show my face at the next
IETF without it... :-)