Shorter mclt times?

[Nicholas F Miller]

I'm not trying to be obtuse, but...

...we currently have two dedicated DHCP servers (one is a hot spare)  
that are barley taxed. I am at a loss to understand why a short MCLT  
would cause us any trouble. Our current DHCP server can/could handle a  
large number of clients that may start their leases around the same  
time. Why would failover, with a failover partner as powerful as the  
primary server, have a problem with a short MCLT?

_________________________________________________________
Nicholas Miller, ITS, University of Colorado at Boulder



On Jul 15, 2009, at 9:11 AM, Bruce Hudson wrote:

>
>
>> I'm sorry, but I am afraid I didn't follow your logic. If one of the
>> DHCP servers is capable of handling all of the leases then why  
>> would a
>> short MCLT cause any issues? If you had subnets with lease times of
>> 15min a MCLT of 30min would cause problems if a subnet ran out of  
>> free
>> leases.
>
>    With 15 minute leases normally, a 30 minute MCLT will not cause any
> problems. You (potentially) get problems when the MCLT is much lower
> than your lease time and you get a large number of clients that start
> their leases around the same time. That senario, far more common than
> yours I suspect, will increase the load on your server; perhaps past a
> critical point.
>
>    You should always be able to lower the MCLT to your maximum lease
> time without problems.
> --
> Bruce A. Hudson				| Bruce.Hudson at Dal.CA
> ITS, Networks and Systems		|
> Dalhousie University			|
> Halifax, Nova Scotia, Canada		| (902) 494-3405
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