From: Mark Andrews <marka@isc.org>
Date: Thu, 5 Sep 2019 00:18:36 +0000 (+1000)
Subject: remove discussion about falling back to plain DNS on timeout
X-Git-Tag: v9.15.4~5^2
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=aca78add3a686f7df1053efc3cba3b7df44b7342;p=thirdparty%2Fbind9.git

remove discussion about falling back to plain DNS on timeout
---

diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index 86d4ccd1876..f1722e104cf 100644
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -8963,18 +8963,7 @@ avoid-v6-udp-ports { 40000; range 50000 60000; };
 		  this has the greatest chance of success on the first try.
 		</para>
 		<para>
-		  If the initial response times out, <command>named</command>
-		  will try again with plain DNS, and if that is successful,
-		  it will be taken as evidence that the server does not
-		  support EDNS. After enough failures using EDNS and
-		  successes using plain DNS, <command>named</command>
-		  will default to plain DNS for future communications
-		  with that server.  (Periodically, <command>named</command>
-		  will send an EDNS query to see if the situation has
-		  improved.)
-		</para>
-		<para>
-		  However, if the initial query is successful with
+		  If the initial query is successful with
 		  EDNS advertising a buffer size of 512, then
 		  <command>named</command> will advertise progressively
 		  larger buffer sizes on successive queries, until