Index: head/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml
===================================================================
--- head/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml
+++ head/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml
@@ -5105,13 +5105,15 @@
 	the master becomes available again.</para>
 
       <note>
-	<para>Preemption is disabled by default.  If preemption has
-	  been enabled, <systemitem>hostc.example.org</systemitem>
-	  might not release the virtual <acronym>IP</acronym> address
-	  back to the original master server.  The administrator
+	<para>If the original master server becomes available again,
+	  <systemitem>hostc.example.org</systemitem>  will not release
+	  the virtual <acronym>IP</acronym> address back to it
+	  automatically.  For this to happen, preemption has to be
+	  enabled.  The feature is disabled by default,
+	  it is controlled via the &man.sysctl.8; variable
+	  <varname>net.inet.carp.preempt</varname>.  The administrator
 	  can force the backup server to return the
-	  <acronym>IP</acronym> address to the master with the
-	  command:</para>
+	  <acronym>IP</acronym> address to the master:</para>
 
 	<screen>&prompt.root; <userinput>ifconfig em0 vhid 1 state backup</userinput></screen>
       </note>