From mboxrd@z Thu Jan 1 00:00:00 1970 From: md@Linux.IT (Marco d'Itri) Date: Sat, 25 Mar 2006 10:53:18 +0000 Subject: Re: killing a pptp tunnel with a single ping Message-Id: <20060325105318.GA5841@wonderland.linux.it> MIME-Version: 1 Content-Type: multipart/mixed; boundary="CE+1k2dSO48ffgeK" List-Id: References: <20060324232128.GA23810@wonderland.linux.it> In-Reply-To: <20060324232128.GA23810@wonderland.linux.it> To: linux-ppp@vger.kernel.org --CE+1k2dSO48ffgeK Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mar 25, Marco d'Itri wrote: > This is the reason for me not initially setting the tunnel MTU, I > did not want to compute the overhead myself. I think that a section > in your PPTP FAQ explaining how to do this would be very useful. I tried setting "mtu 1456" on the cisco side and now large pings do not kill the tunnel anymore even with MPPE enabled, but I do not understand why pppd on the other side sets the tunnel uses 1452 as the link MTU. Only the MRU is negotiated: rcvd [LCP ConfReq id=3D0x1 ] sent [LCP ConfAck id=3D0x1 ] How can I fix this without forcing the MTU on the Linux side? --=20 ciao, Marco --CE+1k2dSO48ffgeK Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQFEJSEeFGfw2OHuP7ERAp1PAJ9Zffe2l+2ywI1gGQlZM0IurTBDuQCeNYqW WGdfX5eWQvTEV70IeX1SWh0= =Kxj8 -----END PGP SIGNATURE----- --CE+1k2dSO48ffgeK--