Date: Mon, 29 Mar 2004 09:18:46 +0200 (=?ISO-8859-15?Q?Westeurop=E4ische_Sommerzeit?=) From: Michael Bretterklieber <mbretter@a-quadrat.at> To: Jay Hall <jhall@vandaliamo.net> Cc: freebsd-net@freebsd.org Subject: RE: PPTP MTU Message-ID: <Pine.WNT.4.58.0403290916180.3568@BRUTUS> In-Reply-To: <40679626.1040104@vandaliamo.net> References: <40679626.1040104@vandaliamo.net>
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Hi, On Sun, 28 Mar 2004, Jay Hall wrote: > OK, I think I have an MTU negotiation problem. The server side sets an > MTU of 1458 and the client side sets an MTU of 1456. Occassionally, the > MTUs on the client and the server will be the same and then the > connection comes up and runs like a champ as long as the MTU is 1456. > Any other values, even if they are the same on the client and server end > result in a connection that comes up and then drops. > > Both the client and the server contain the line > > set link mtu 1460 > > Mar 27 00:22:52 ST_CHARLES mpd: [vpn] CCP: rec'd Configure Nak #1 link 0 > (Req-Sent) > Mar 27 00:22:52 ST_CHARLES mpd: MPPC > Mar 27 00:22:52 ST_CHARLES mpd: 0x01000040: MPPE, 128 bit, stateless > Mar 27 00:22:52 ST_CHARLES mpd: [vpn] CCP: SendConfigReq #2 > Mar 27 00:22:52 ST_CHARLES mpd: MPPC > Mar 27 00:22:52 ST_CHARLES mpd: 0x01000040: MPPE, 128 bit, stateless > Mar 27 00:22:52 ST_CHARLES mpd: [vpn] error writing len 14 frame to > bypass: No route to host there is a problem with the underlaying connection, could you please post the whole log, from the beginning of the connection. the value of 1456 is ok, because Mpd takes the ppp-header into account, wich has usually 4 bytes. bye, -- ------------------------------- ---------------------------------- Michael Bretterklieber - http://www.bretterklieber.com A-Quadrat Automation GmbH - http://www.a-quadrat.at Tel: ++43-(0)3172-41679 - GSM: ++43-(0)699 12861847 ------------------------------- ---------------------------------- "...the number of UNIX installations has grown to 10, with more expected..." - Dennis Ritchie and Ken Thompson, June 1972
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