Document update-optimization config parameter.

diff --git a/server/dhcpd.conf.5 b/server/dhcpd.conf.5
index af66897beec0ca969777ac07d21eb3a63310b3d0..e76f210b647e94b53ae7d8f3039fe5ec40a0786b 100644 (file)
--- a/server/dhcpd.conf.5
+++ b/server/dhcpd.conf.5
@@ -1962,6 +1962,23 @@ details).
 .RE
 .PP
 The
+.I update-optimization
+statement
+.RS 0.25i
+.PP
+.B update-optimization \fIflag\fB;\fR
+.PP
+If the \fIupdate-optimization\fR parameter is true for a given client,
+the server will attempt a DDNS update for that client each time the
+client renews its lease, rather than only attempting an update when it
+appears to be necessary.   This will allow the DNS to heal from
+database inconsistencies more easily, but the cost is that the DHCP
+server must do many more DDNS updates.   We do not recommend enabling
+this on large networks with the current DHCP server.   This option
+only affects the behaviour of the \fIinterim\fR DDNS update scheme,
+and has no effect on the \fIad-hoc\fI DDNS update scheme.
+.PP
+The
 .I use-host-decl-names
 statement
 .RS 0.25i