removing dynamic addresses

Shawn Routhier sar at
Thu May 10 18:46:55 UTC 2012

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.


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