problem with both-faiover-server updating the DNS

[gnafou]

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.

thank you if you can give me a hint 

Fred 

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[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 <[hidden email]> 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.

_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users

[gnafou]

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 

Thanks

Fred 

Le Vendredi 4 septembre 2015 20h00, John Miller <[hidden email]> 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)

John

On Fri, Sep 4, 2015 at 12:23 PM, gnafou <[hidden email]> 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.

_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users