Getting different ip's each time on DHCP

Glenn Satchell Glenn.Satchell at
Fri Nov 27 07:47:40 UTC 2009


You could try adding the setting

       one-lease-per-client flag;

       If this flag is enabled, whenever a client sends a DHCPRE-
       QUEST  for  a  particular lease, the server will automati-
       cally free any  other  leases  the  client  holds.    This
       presumes  that when the client sends a DHCPREQUEST, it has
       forgotten any lease not mentioned  in  the  DHCPREQUEST  -
       i.e.,  the  client has only a single network interface and
       it does not remember leases it's holding  on  networks  to
       which  it  is  not  currently attached.   Neither of these
       assumptions are guaranteed or provable, so we urge caution
       in the use of this statement.

Maybe this is only required for a little while to see if dhcpd can
repair itself.

Otherwise, are you able to upgrade to a newer release. There is 3.1.3,
4.1.0 and 4.1.1b3 to choose from. Going to 3.1.3 should be possible
without changing any of your configuration files. There have been lots
of failover bug fixes, and this may help.


>Date: Thu, 26 Nov 2009 22:19:45 -0800 (PST)
>From: Bunny Singh <jump2fly82 at>
>Subject: Re: Getting different ip's each time on DHCP
>To: dhcp-users at
> Still getting different IP's each time. Both server are synched with each 
> Any help is highly appreciated.
> Regards
> Daljit singh
> --- On Sun, 11/22/09, Bunny Singh <jump2fly82 at> wrote:
> From: Bunny Singh <jump2fly82 at>
> Subject: Getting different ip's each time on DHCP
> To: dhcp-users at
> Date: Sunday, November 22, 2009, 9:35 AM
> Hi, 
> We have 2 DHCP servers running on failover mode under 3.0.5 version. Problem 
is everytime when Client sends the discover message then the servers are 
providing different IP each time and messages occuring 
> " uid lease for client is duplicate on x.x.x.x/x"
> I have checked the following to troublshoot:--
> 1. Both servers are synched with NTP and have a same time.
> 2. Both are on Partner-normal-state.
> I am facing this issue from last one month and nothing has been acheved yet. 
> Can anybody have some idea or solution to this problem, I will be very 
> Regards
> Daljit Singh 

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