problem with both-faiover-server updating the DNS

gnafou fmgre-liste01 at
Mon Sep 7 08:49:06 UTC 2015

both servers answer to the DHCPREQUEST offering the same IP address. 
I have a few fixed-address records, but their DNS is done manually. i do not have the update-static-leases option specified
The problem is encountered on 'some' addresses ... still trying to figure out which ones
During the weekend i upgraded to the 4.3.2 but  i think i still observe weird behaviour  

     Le Vendredi 4 septembre 2015 20h00, John Miller <johnmill at> a écrit :

 Both dhcp servers answering is standard procedure.  Are both offering
the same IP address, however?  That's not standard procedure.

Are you doing dns updates for hosts with fixed-address directives, by
any chance? (update-static-leases on)


On Fri, Sep 4, 2015 at 12:23 PM, gnafou <fmgre-liste01 at> wrote:
> Hello
> I currently have  isc dhcp servers working with failover and dns update (
> interim style )
> When upgrading my debian machine from wheezy to jessie, it upgraded as well
> dhcpd from 4.2.2 to 4.3.1.
> Since i have upgraded, i find some weird behaviour with the DNS-Update :
> for some of the machines, both  dhcp servers answer, then they both update
> the DNS.
> I do not have any log lines stating ' lease owned by peer'
> And after the lease is over,  one of the dhcp server  deletes the dns map
> though the machine is currently being served by the other server.

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