update static leases

Richard Smits R.Smits at tudelft.nl
Tue Aug 21 19:51:31 UTC 2007


Can anyone please give me some information about this ? I am confused.
The following scenario :
ISC DHCP server with the folowing (relevant) options :
ddns-hostname=                 host-decl-name;
ddns-update-style              interim;
ddns-updates                   on;
zone domain.net.              {primary; key DHCP_UPDATER;}
use-host-decl-names on;
update-static-leases on;

subnet netmask {
  option domain-name             "domain.net";

Folowing are the host statements......

DDNS updates are working fine, but the records of old pc's are NOT
removed. If I read the manual right, the "update-static-leases on" flag
is the reason for this, because :
It is not recommended because the DHCP server has no way
to tell that the update has been done, and therefore will not delete the
record when it is not in use.

Now the big question : If I CHANGE an IP number or a Hostname , will the
record be updated ???

The record excists, so the server would be able to change it, right ?

Greetings, and thanks for the info .

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