Subject: Re: MSS doesn't honour route MTU
To: Quentin Garnier <cube@cubidou.net>
From: Thor Lancelot Simon <tls@rek.tjls.com>
List: tech-net
Date: 06/08/2006 14:58:29
On Thu, Jun 08, 2006 at 08:11:26PM +0200, Quentin Garnier wrote:
> On Thu, Jun 08, 2006 at 09:07:32PM +0300, Mihai CHELARU wrote:
> [...]
> > Shouldn't it announce MSS 1160 (ROUTE_MTU - 40, as RFC879 says) instead of 
> > 1460(probably IF_MTU - 40), honouring the route MTU I've just added ?
> 
> Not unless you set net.inet.tcp.mss_ifmtu to 1.

That seems wrong (both "wrong" as in "not what the code does" and "wrong"
as in "not what the code should do").

Thor