Different pools for dynamic and "static" leases

Keith Lawson Keith.Lawson at sjhc.london.on.ca
Thu Mar 22 13:14:55 UTC 2007

>>> On Wed, Mar 21, 2007 at  2:40 PM, in message
<a06230912c2272c32399f@[]>, Simon Hobson <dhcp1 at thehobsons.co.uk>
> Keith Lawson wrote:
>>We've setup 2 pools in our subnet declarations. One pool is for 
>>dynamic clients and the other is for "static" clients that have host 
>>declarations with "fixed- address" options. We added the static pool 
>>since our servers are configured in a failover pair.
>>subnet netmask {
>>    option routers...
>>    # dynamic pool
>>    pool {
>>       options...
>>       range;
>>    }
>>   # static pool
>>    pool {
>>      options...
>>       range;
>>Is there a way to stop dynamic hosts from getting addresses out of 
>>the static pool?
> You MUST NOT have an address which is both in a pool range statement 
> and also allocated via a fixed address statement -  the server does 
> NOT check and will quite happily give out an addresses to a dynamic 
> client and later attempt to give the same address to the fixed 
> address client.

How does failover and load balancing function then if the static IP's aren't part of any range statement? 

The information transmitted is intended only for the person or
entity to which it is addressed and may contain confidential and/or
privileged material. Any review, retransmission, dissemination or
other use of, or taking of any action in reliance upon, this
information by persons or entities other than the intended
recipient is prohibited. If you received this in error, please
contact the sender and delete the material from any computer.

More information about the dhcp-users mailing list