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More swping changes

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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@9356 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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teastep 2009-01-30 23:43:19 +00:00
parent 7fcba909df
commit bafa0eede5
1 changed files with 31 additions and 6 deletions
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37
docs/MultiISP.xml
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@ -640,14 +640,22 @@
place to start.</para>
</important>
<para>The script should be copied to a directory on root's PATH such as
<filename>/usr/local/sbin/.</filename></para>
<para>The script monitors two interfaces but it is a trivial exercise to
extend it to more than two. At the top are a number of variables to
set:</para>
<programlisting># The commands to run when the status of a line changes. Both commands will be executed.
<programlisting>#
# IP family -- 4 or 6
#
COMMAND1=
COMMAND2="ip -4 route ls"
FAMILY=4
#
# The commands to run when the status of a line changes. Both commands will be executed.
#
COMMANDA=
COMMANDB="ip -$FAMILY route ls"
...
#
# Interfaces to monitor -- you may use shell variables from your params file
@ -676,7 +684,7 @@ UP_COUNT=5
#
DOWN_COUNT=2</programlisting>
<para>If you leave COMMAND1 empty, the script sets its value
<para>If you leave COMMANDA empty, the script sets its value
automatically depending on whether Shorewall-lite is installed.</para>
<para>When the status of an interface changes:</para>
@ -722,11 +730,28 @@ return $status</programlisting></para>
on <trademark>OpenSuSE</trademark> 11.0 -- YMMV. Modify the PROG and
STATEDIR variables as needed.</para>
<para>As an alternative to using the init script, you can add the
following to <filename>/etc/shorewall/started</filename>:</para>
<programlisting>if [ "$COMMAND" = start ]; then
killall -9 swping 2&gt; /dev/null #be sure that there are none left running
/usr/local/sbin/swping &amp;
fi</programlisting>
<para>and add this to
<filename>/etc/shorewall/stopped</filename>.</para>
<para><programlisting>if [ "$COMMAND" = stop -o "$COMMAND" = clear ]; then
killall -9 swping 2&gt; /dev/null
fi</programlisting></para>
<para>This simple script has a number of limitations:</para>
<orderedlist>
<listitem>
<para>It only works on IPv4 (but is easy to modify for IPv6)</para>
<para>It only works on IPv4 or IPv6 but not both at once. So if you
want to monitor both IPv4 and IPv6, you need to clone the script are
run two copies; one for IPv4 and one for IPv6.</para>
</listitem>
<listitem>
@ -744,7 +769,7 @@ return $status</programlisting></para>
</listitem>
<listitem>
<para>It is tricky to configure a system such that a system works
<para>It is tricky to configure a system such that the system works
correctly when one of its providers is down unless you largely don't
care which interface is used.</para>
</listitem>