From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Cameron Date: Tue, 03 Feb 2004 22:01:21 +0000 Subject: Re: ppp-2.4.2 released Message-Id: <20040203220121.GA8838@hp.com> List-Id: References: <16391.33929.908463.444449@cargo.ozlabs.ibm.com> In-Reply-To: <16391.33929.908463.444449@cargo.ozlabs.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ppp@vger.kernel.org On Tue, Feb 03, 2004 at 08:25:55AM -0800, Frank Cusack wrote: > MS pptp-server is broken for ppp though. It sends frames that are too > large (>MTU). This will break some pppd's. Maybe I can work up a patch > in the next few days. Don't hold your breath, though. If you need motivation, section 3.3.4 of RFC1812 says that a router (in this case pppd) SHOULD be willing to receive a packet as large as the maximum frame size even if that is larger than the MTU. http://www.faqs.org/rfcs/rfc1812.html It then goes on to say ... If a network is using an MTU smaller than the maximum frame size for the Link Layer, a router may receive packets larger than the MTU from misconfigured and incompletely initialized hosts. The Robustness Principle indicates that the router should successfully receive these packets if possible. I've no idea what supercedes RFC1812. -- James Cameron http://quozl.netrek.org/ HP Open Source, Volunteer http://opensource.hp.com/ PPTP Client Project, Release Engineer http://pptpclient.sourceforge.net/