duplicate uid leases

[Carlos Vicente]

Hi Kevan,

See:

https://lists.isc.org/pipermail/dhcp-users/2010-July/011665.html

I doubt that this has ever been formally reported to ISC. Perhaps it's
time to do so.

cv

On Wed, Jun 1, 2011 at 10:41 AM, Kevan Carstensen
<kacarstensen at csupomona.edu> wrote:
> Hi,
>
> We have a pair of servers running DHCP 4.1 in a failover configuration.
> We see a lot of messages like the following in our logs:
>
>        Mar 26 04:53:32 servername dhcpd: uid lease xxx.xxx.xxx.xxx for client xx:xx:xx:xx:xx:xx is duplicate on xxx.xxx.xxx.xxx/xx
>
> They seem to occur most frequently after a client sends a DHCPDISCOVER
> that is answered with a DHCPOFFER by both of our servers. In that
> scenario, the server whose offer isn't later requested by the client
> logs the message upon receiving the client's DHCPREQUEST. The uid lease
> referenced by the message is the same lease offered by the server to the
> client (i.e., the lease that the client didn't request in its
> DHCPREQUEST message).
>
> We haven't heard or seen anything that suggests that these messages
> correspond to service issues for clients on our network. Has anyone
> investigated these messages enough to say whether they might correspond
> to a problem?
>
> Thanks,
> --
> Kevan Carstensen                        <kacarstensen at csupomona.edu>
> Operating Systems Analyst, I&IT Systems, Cal Poly Pomona
>
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