Thank you, Adam.  We had the DHCP default lease time set to 4 hours and the 
Maximum lease time was set to the default of 24 hours.  So we lowered the 
default lease to 2 hours and left the maximum lease at 24 hours.  What this 
tells me is that with the default lease, it will do another DHCP negotiation at 
the ½ life or in this case an hour.  The maximum lease time says that 
10.10.10.10 will only be allowed to lay claim to that lease for one day.  Is 
this a correct assumption?  Should I lower the maximum lease time as well?

Thanks

Dwane

From: Adam Thompson [mailto:athom...@athompso.net]
Sent: Tuesday, March 15, 2011 12:05 PM
To: support@pfsense.com
Subject: RE: [pfSense Support] RE: DHCP server settings

Yes.  Many clients will automatically ask for longer lease times than your 
default.
-Adam


From: Atkins, Dwane P [mailto:atki...@uthscsa.edu]
Sent: Tuesday, March 15, 2011 10:36
To: 'support@pfsense.com'
Subject: [pfSense Support] RE: DHCP server settings

I am not trying to spam mail, but should we set the maximum lease time as well? 
It is currently at default.

Dwane

From: Atkins, Dwane P [mailto:atki...@uthscsa.edu]
Sent: Tuesday, March 15, 2011 10:34 AM
To: 'support@pfsense.com'
Subject: [pfSense Support] DHCP server settings

We recently lowered our DHCP lease time to the default of 2 hours.

After a couple hours, I was checking the DHCP leases and see some that have a 
difference of 2 hours from the Start and End time.  However, there are some 
that have a 24 hour difference.  Is there a way to completely clear out the 
DHCP lease time and restart the DHCP server.  These leases started almost 3 
hours after I had modified the default lease time.

Thanks

Dwane

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