DHCP Redundancy

[Christ Schlacta]

Is there no database backend for leases?  I may be wrong, but I think 
that would greatly simplify redundancy AND failover.

On 11/27/2010 10:26 AM, sthaug at nethelp.no wrote:
>>> If you run two servers on a network, then you must do one of two things :
>>>
>>> 1) Run them as a failover pair so they can manage one set of client
>>> addresses between them.
>>>
>>> or
>>>
>>> 2) Run them with separate and non-overlapping address ranges so that they
>>> don't interfere with each other.
>> We did that on our campus, and it didn't seem to work.  The one
>> time we ran out of disk space on one of the DHCP servers, we just
>> had machines start losing their leases&  needing to be rebooted.
> DHCP depends on having enough disk space for the leases file. If you
> run out of disk space all bets are off.
>
>> It's also a giant mess to maintain -- as any static assignments have
>> to be put in the config files on both machines.
> Depends on your requirements, I guess. I work for an ISP, we use DHCP
> with failover. All address assignments are dynamic, and we only have
> the occasional pool that needs to be updated on both servers in the
> failover pair.
>
> DHCP failover seems to work well for us.
>
> Steinar Haug, Nethelp consulting, sthaug at nethelp.no
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