Date: Tue, 10 Apr 2001 14:19:33 -0700 (PDT) From: device@club-internet.fr To: freebsd-gnats-submit@freebsd.org Subject: docs/26489: incomplete info in the ppp faq about "PPP freezing when using PPPoE on the gateway" Message-ID: <200104102119.f3ALJX599034@freefall.freebsd.org>
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>Number: 26489
>Category: docs
>Synopsis: incomplete info in the ppp faq about "PPP freezing when using PPPoE on the gateway"
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-doc
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: wish
>Submitter-Id: current-users
>Arrival-Date: Tue Apr 10 14:20:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: Guy Poizat
>Release: 4.2-RELEASE & 4.2-STABLE
>Organization:
Parts Online
>Environment:
problem not specific to a release
>Description:
The FAQ says :
"One fix is to use regedit on your 95/98 boxes to add the following registry entry...
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\NetTrans\0000\MaxMTU
It should be a string with a value ``1450'' (more accurately it should be ``1464'' to fit TCP packets into a PPPoE frame perfectly but the ``1450'' gives you a margin of error for other IP
protocols you may encounter). This registry key is reported to have moved to Tcpip\Parameters\Interfaces\ID for adapter\MTU in Windows 2000.
Refer to Microsoft Knowledge Base documents ``Q158474 - Windows TCPIP Registry Entries'' and ``Q120642 - TCPIP & NBT Configuration Parameters for Windows NT '' for
more information on changing Windoze MTU to work with a FreeBSD/NAT/PPPoE router."
1) 1435 would be a better value to suggest, as some ADSL modems are reported not to be able to deal with packets greater than 1436
according to http://support.microsoft.com/support/kb/articles/Q120/6/42.asp
2) the "MTU" key should be a DWORD and not a STRING
3) Another 'cool' Registry key to use under windows 2000 is "EnablePMTUBHDetect" which is intended to auto-resolve MTU-discovery troubles of that kind
>How-To-Repeat:
lynx http://www.freebsd.org/FAQ/ppp.html#MACOS-WIN98-PPPOE-FREEZE
lynx http://support.microsoft.com/support/kb/articles/Q120/6/42.asp
(Well...perhaps lynx isn't the right tool for that last one)
>Fix:
insert these statements into the PPP FAQ
>Release-Note:
>Audit-Trail:
>Unformatted:
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