DHCP "static" assignments

Steven Carr sjcarr at gmail.com
Wed Aug 7 20:09:26 UTC 2013

On 7 August 2013 20:43, Gregory Sloop <gregs at sloop.net> wrote:
> [IMO, it would still be a lot easier if you just had to put in the host
> entry, and then define the pool as 1-20, and it wouldn't assign any
> IP's for defined hosts to any other host.

So ISC's take is that if it's defined it can lease it, if it's not
defined then it can't be given out, unlike Microsoft's stance of we
can lease it unless you tell me not to.

If you configure a "static" host then that IP will be given to that
host regardless of where it is in the subnet and whether or not it
overlaps an existing pool (if it does overlap the pool then the pool
won't issue that IP address, it ignores it - so in your case above
there is no point in defining a pool when the pool is never going to
get used anyway).

IMHO this is a much simpler model than defining all available space
and then restricting it afterwards, just define what you want to
actually use and ignore the rest.


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