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Give better and more correct information about black hole routers.

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Suggested by:	Guy Poizat <device@club-internet.fr>
PR:		26489
This commit is contained in:
Brian Somers 2001-09-03 03:09:59 +00:00
parent 3baa9ec573
commit 7f85b08e06
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=10555
1 changed files with 13 additions and 11 deletions
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24
en_US.ISO8859-1/books/faq/book.sgml
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@ -17,7 +17,7 @@
<corpauthor>The FreeBSD Documentation Project</corpauthor>
<pubdate>$FreeBSD: doc/en_US.ISO8859-1/books/faq/book.sgml,v 1.259 2001/08/31 16:26:23 dd Exp $</pubdate>
<pubdate>$FreeBSD: doc/en_US.ISO8859-1/books/faq/book.sgml,v 1.260 2001/08/31 17:04:49 dd Exp $</pubdate>
<copyright>
<year>1995</year>
@ -10008,22 +10008,24 @@ ATDT1234567</programlisting>
<programlisting>HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\NetTrans\0000\MaxMTU</programlisting>
<para>It should be a string with a value <quote>1450</quote>
(more accurately it should be <quote>1464</quote> to fit TCP
packets into a PPPoE frame perfectly but the
<quote>1450</quote> gives you a margin of error for other IP
protocols you may encounter). This registry key is reported to
have moved to
<para>It should be a string with a value <quote>1436</quote>, as
some ADSL routers are reported to be unable to deal with packets
larger than this. This registry key has been changed to
<literal>Tcpip\Parameters\Interfaces\<replaceable>ID for adapter</replaceable>\MTU</literal>
in Windows 2000.</para>
in Windows 2000 and becomes a DWORD.</para>
<para>Refer to <ulink
URL="http://search.support.microsoft.com/kb">Microsoft Knowledge
Base</ulink> documents <quote>Q158474 - Windows TCPIP Registry
Entries</quote> and <quote>Q120642 - TCPIP & NBT Configuration
Parameters for Windows NT</quote> for more information on
changing Windoze MTU to work with a FreeBSD/NAT/PPPoE
router.</para>
Parameters for Windows NT</quote> and <ulink
url="http://support.microsoft.com/support/kb/articles/Q120/6/42.asp">
Microsoft Q120</ulink> for more information on
changing Windows MTU to work with a NAT router.</para>
<para>Another regedit possibility under Windows 2000 is to set the
<literal>Tcpip\Parameters\Interfaces\<replaceable>ID for adapter</replaceable>\EnablePMTUBHDetect</literal>
DWORD to 1 as mentioned in the Microsoft Q120 link above.</para>
<para>Unfortunately, MacOS does not provide an interface for
changing TCP/IP settings. However, there is commercial software