Failover Clarification

Benjamin Wiechman benw at
Wed May 9 18:19:21 UTC 2007

> The whole balancing algorithm, changed in 3.1.0a (alpha). I'm running
> 3.1.0a3 and on an idle network I see a balancing log entry every 60
> minutes. This period is completely configurable in dhcpd.conf. Quickly
> looking at the dhcpd.conf man pages between 3.0.5 and 3.0.0a3 I think
> you definitely want 3.1.0 for your situation.

I'm assuming you're talking about the new pool misbalance directives that
have been added.

>> When you're down to the last free IP one server will not reply because
>> it has no lease to offer. The other server should offer the available
>> lease that it has.
>OK. That is reasonable. So if I'm running a dhcp relay through my switches
>would need to be doing a directed broadcast to allow the servers to perform
>their own load balancing, rather than a relay by IP.
> I've always configured two relay statements so that requests were
> forwarded to both dhcp servers.

Easy enough to do.

More information about the dhcp-users mailing list