removing dynamic addresses

Dan McDaniel dan at
Thu May 10 20:29:59 UTC 2012

On Thu 10.May.12 11:46, Shawn Routhier wrote:
>On May 10, 2012, at 9:08 AM, Glenn Satchell wrote:
>> On 05/11/12 01:07, Dan McDaniel wrote:
>>> My dhcp server is updating bind with new addresses, but old expired
>>> leases are not being removed. Not sure where to look to solve this.
>>> Is dhcp supposed to update bind to remove the maps when the leases
>>> expire? In my logs I see where it adds maps, but nothing about removing
>>> them.
>>> dhcp 4.2.2
>>> bind 9.2.4
>> There was a recent post on this topic, which suggested that if a client releases a lease then dhcpd will delete the dns entry, but if it expires then it takes a different code path and doesn't delete the dns entry.
>> --
>> regards,
>> -glenn
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at
>I think it was the other direction.  If you do a release it doesn't clean up
>all of the DDNS information.  This should be fixed in 4.2.4.  If you can
>use a release candidate version 4.2.4rc1 may fix the problem.
>Though as the original comment states that they aren't being removed
>on expiry there may be another issue as well.
I just did another test. I released the lease from the PC. In dhcp it
went from status active to free, but it is still showing in DNS.


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