On Wed, Oct 23, 2002 at 11:25:44PM +0200, Manuel Bouyer wrote:

 > After seeing Nicolas Saurbier's mail on netbsd-help
 > http://mail-index.netbsd.org/netbsd-help/2002/10/21/0003.html
 > about the TCP packet sizes and the default's route MTU, I tried a
 > route change default xxxx -mtu 1500 on the 1.6 source host. I get the
 > full speed again.
 > Changing the MTU on the target host doesn't change anything.
 > 
 > I guess the default MTU for a route entry should be the one of the interface
 > it goes though, isn't it ? It looks like something is broken here ...

Something is surely fishy, but the route entry should NOT have the mtu
for its interface.  Doing so has caused a number of problems with path
MTU discovery in the past, and I'm not particularly interested in having
to fix it again.

Is Path MTU discovery enabled on your machine?

-- 
        -- Jason R. Thorpe <thorpej@wasabisystems.com>