DHCP lease order
bff at pvhs.org
Fri Jan 23 21:09:08 UTC 2009
To be honest the request didn't make sense to me either but I had to ask. I'll inquire as to the
reason and respond back to the list.
Thanks for the response.
Senior System Administrator
Poudre Valley Health Care
3702 Automation Way
Fort Collins CO 80525
bff at pvhs.org
(970) 495-7731 office
(970) 689-2503 cell
>>> Simon Hobson <dhcp1 at thehobsons.co.uk> 1/23/2009 1:20 PM >>>
Brendan Forsyth wrote:
>Our dhcp server gives out leases from the end of the subnet back to
>Is it possible to reverse this ordering?
Actually, the ISC server allocates (never used before) addresses in
an implementation specific and undocumented order - it just so
happens that AT THE MOMENT it does it "top down".
That is only the case when there are addresses that have never been
used. Once there are no such addresses, it will reclaim expired
leases in a least recently used manner and normally addresses will
then appear to be allocated randomly.
There is no direct way to influence allocation order of addresses,
but you can fudge the issue if you really care (why ?). If you write
a script that will create dummy leases for all available addresses,
then you can determine the order that addresses will be allocated in
future by simply ordering the expiry date/time of each dummy lease.
The obvious question is why do you want a specific order ? There
isn't really any good reason other than your are trying to do
something that probably has a another way.
Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.
dhcp-users mailing list
dhcp-users at lists.isc.org
CONFIDENTIALITY NOTICE: The information contained in this e-mail is privileged and confidential, and is intended only for the use of the individual or entity named above. If you are not the intended recipient, you are notified that any disclosure, copying, distribution, electronic storage or use of this communication is prohibited. If you received this communication in error, please notify us immediately by e-mail, attaching the original message, and delete the original message from your computer and any network to which your computer is connected.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the dhcp-users