problem with both-faiover-server updating the DNS

[John Miller]

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)

John

On Fri, Sep 4, 2015 at 12:23 PM, gnafou <fmgre-liste01 at yahoo.fr> 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.