We generally have two DHCP servers per site.  The 3 day lease was instituted
2 or 3 years ago... maybe longer... when we had a very limited amount of IP
addresses that could be assigned - basically ran out of them too often and
had to clear out leases.  We have more than enough now though.  That's
something to consider... raising DHCP lease times instead of lowering DNS
scavenging times.

Thanks Joe...

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] 
Sent: Sunday, August 31, 2003 9:31 AM
To: [EMAIL PROTECTED]
Subject: RE: [ActiveDir] DNS Scavenging and DHCP Lease Expiration Times

None to me either.

However that DHCP lease time seems short. How many DHCP servers do you have
per site? With that lease time you should probably have a couple or a
guarantee to be able to not have an outage of the server greater than 3 days
or more preferably (to me) more than 1.5 days - lease half-life. 

About the only time I would recommend to anyone to go below 7-14 days on
lease times is if they are trying to switch values for some of the
networking components through DHCP.

What is the idea behind the 3 day lease time?

   joe


         -----Original Message-----
        From:   [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]  On Behalf Of Rick Kingslan
        Sent:   Saturday, August 30, 2003 12:32 PM
        To:     [EMAIL PROTECTED]
        Subject:        RE: [ActiveDir] DNS Scavenging and DHCP Lease
Expiration Times

        None that occur to me off the top of my head.

        Rick Kingslan  MCSE, MCSA, MCT
        Microsoft MVP - Active Directory
        Associate Expert
        Expert Zone - www.microsoft.com/windowsxp/expertzone
         


        _____________________________________________ 
        From:   [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]  On Behalf Of Marcus Oh
        Sent:   Friday, August 29, 2003 4:56 PM
        To:     [EMAIL PROTECTED]
        Subject:        [ActiveDir] DNS Scavenging and DHCP Lease Expiration
Times

        Hey folks,

        Our DNS scavenging cycle is 7 days.  Our DHCP leases expire every 3
days.  Are there any notable drawbacks or problems in changing the DNS
scavenging time period to match the DHCP lease expiration time period?
        
        Thanks!

        Marcus

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