Aw: Re: Re: ISC dhcp assigns ip addresses outside dynamic range

Christian Kratzer ck-lists at
Fri Jul 6 05:25:31 UTC 2018


On Thu, 5 Jul 2018, perl-list wrote:

> This line:
> Jul  5 13:14:35 a-rl-dhcp1 dhcpd[20145]: bind update on from dhcp-failover rejected: unknown IP address
> Makes it seem like it was handed out dynamically. Static assignments with fixed-address are not written to a lease file. They are also not sent to the peer.

There is no lease for a static reservation but you can provision static reservations to the lease file by omapi.

You will find things like this in the lease file in those cases

 	host foo  {
 	  host-identifier option agent.circuit-id "foo";

 	host bar {
 	  hardware ethernet 00:50:00:00:00:01;

I have a patch that also allowes provisioning of hosts with host-identifier via omapi.

Propably not the case here but I would still want to check.


> I'm not sure what is going on here.
>> From: "Frank Ulherr" <dhcp at>
>> To: ck at, "Users of ISC DHCP" <dhcp-users at>
>> Sent: Thursday, July 5, 2018 8:10:22 AM
>> Subject: Aw: Re: Re: ISC dhcp assigns ip addresses outside dynamic range
>> Hi!
>> * "Christian Kratzer" <ck-lists at> wrote:
>>> oh now there is also redunancy involved so you have two config files and two
>>> lease files.
>>> If you want help please do as asked previously
>>> 1. post logs of the transaction
>>> 2. post both configs that were effective at time of the transaction
>>> 3. check both lease files for the ip and the mac at the time of the transaction
>>> for entries with the mac or the ip
>>> The more you obfuscate the less anybody can help you.
>> Attached the config and log files.
>> is reserved and is excludes from the dynamic range.
>> dhcpd.conf is the same on the first and second server (dhcpd1.conf)
>> The dhcpd.leases file an the second server does not contain the lease.
>> Regards,
>> Frank
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at

Christian Kratzer                   CK Software GmbH
Email:   ck at               Wildberger Weg 24/2
Phone:   +49 7032 893 997 - 0       D-71126 Gaeufelden
Fax:     +49 7032 893 997 - 9       HRB 245288, Amtsgericht Stuttgart
Mobile:  +49 171 1947 843           Geschaeftsfuehrer: Christian Kratzer

More information about the dhcp-users mailing list