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Document r272720, PLPMTUD blackhole detection (RFC 4821).

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Add Limelight Networks to sponsors.ent.

Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Glen Barber 2015-01-10 22:04:18 +00:00
parent 3b729d632a
commit 9168e3f2db
2 changed files with 76 additions and 0 deletions
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75
release/doc/en_US.ISO8859-1/relnotes/article.xml
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@ -290,6 +290,81 @@
<para revision="263140">Support for the IPX network transport
protocol has been removed, and will not be supported in
&os;&nbsp;11 and later releases.</para>
<para revision="272720" contrib="sponsor"
sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
blackhole detection (<acronym>RFC</acronym> 4821) has been
added to the &man.tcp.4; stack, disabled by default. New
control tunables have been added:</para>
<informaltable frame="none" pgwide="0">
<tgroup cols="2">
<colspec colwidth="1*"/>
<colspec colwidth="1*"/>
<thead>
<row>
<entry>Tunable</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
<entry>Enables or disables <acronym>PLPMTUD</acronym>
blackhole detection</entry>
</row>
<row>
<entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
<entry><acronym>MSS</acronym> to try for IPv4</entry>
</row>
<row>
<entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
<entry><acronym>MSS to try for IPv6</acronym></entry>
</row>
</tbody>
</tgroup>
</informaltable>
<para>New monitoring &man.sysctl.8;s haven been added:</para>
<informaltable frame="none" pgwide="0">
<tgroup cols="2">
<colspec colwidth="1*"/>
<colspec colwidth="1*"/>
<thead>
<row>
<entry>Tunable</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
<entry>Number of times the code was activated to attempt
downshifting the <acronym>MSS</acronym></entry>
</row>
<row>
<entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
<entry>Number of times the blackhole
<acronym>MSS</acronym> was used in an attempt to
downshift</entry>
</row>
<row>
<entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
<entry>Number of times that the blackhole failed to
connect after downshifting the
<acronym>MSS</acronym></entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect3>
<sect3 xml:id="disks">

1
release/doc/share/xml/sponsor.ent
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@ -23,6 +23,7 @@
<!ENTITY google "Google">
<!ENTITY limelight "Limelight Networks">
<!ENTITY lsi "LSI">
<!ENTITY netgate "Netgate">