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For bugs ticket 18302: explain why "Setting max-cache-ttl to 0

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causes SERVFAIL errors for (all?) recursive lookups"
This commit is contained in:
Jeremy Reed
2008-10-17 19:27:52 +00:00
parent 698a4dcc8a
commit ba6c56b358
1 changed files with 5 additions and 1 deletions
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6
doc/arm/Bv9ARM-book.xml
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@@ -18,7 +18,7 @@
- PERFORMANCE OF THIS SOFTWARE.
-->
<!-- File: $Id: Bv9ARM-book.xml,v 1.374 2008/10/15 13:42:44 jreed Exp $ -->
<!-- File: $Id: Bv9ARM-book.xml,v 1.375 2008/10/17 19:27:52 jreed Exp $ -->
<book xmlns:xi="http://www.w3.org/2001/XInclude">
<title>BIND 9 Administrator Reference Manual</title>
@@ -7425,6 +7425,10 @@ avoid-v6-udp-ports { 40000; range 50000 60000; };
Sets the maximum time for which the server will
cache ordinary (positive) answers. The default is
one week (7 days).
A value of zero may cause all queries to return
SERVFAIL, because of lost caches of intermediate
RRsets (such as NS and glue AAAA/A records) in the
resolution process.
</para>
</listitem>
</varlistentry>