guitar333
asked on
DHCP Problems - (Changed to lesser scope and expired leases arent renewing..)
Hi all,
So yesterday I changed my DHCP scope from 192.168.1.109-.199 to 192.168.1.150-.199
I assumed that when a lease expired with one of the lesser addresses it would renew with one of the higher up addresses. (Have less than 50 DHCP clients).
However, I made the change yesterday....and this morning alot of these machines would not renew their IP address! I had to assign static addresses....
What am I missing here??
(This is on a Windows 2003 domain, with a Win2008 server as the DHCP server)
Thanks!!!
So yesterday I changed my DHCP scope from 192.168.1.109-.199 to 192.168.1.150-.199
I assumed that when a lease expired with one of the lesser addresses it would renew with one of the higher up addresses. (Have less than 50 DHCP clients).
However, I made the change yesterday....and this morning alot of these machines would not renew their IP address! I had to assign static addresses....
What am I missing here??
(This is on a Windows 2003 domain, with a Win2008 server as the DHCP server)
Thanks!!!
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
I believe machines will hold the old leases until they are powered off. I changed our DHCP pool range from 10.0.100.x to 10.0.101.x - several weeks ago and there are machines still holding the old IP address lease.
Just because the DHCP pool range changes doesn't mean the usable IP range changes. Windows tries to retain it's last IP address.
I would manually delete leases from the server and force them to renew their DHCP leases to regain connectivity.
Just because the DHCP pool range changes doesn't mean the usable IP range changes. Windows tries to retain it's last IP address.
I would manually delete leases from the server and force them to renew their DHCP leases to regain connectivity.
ASKER
Duhh!! ;)
You need to release then renew the IP's from your clients to get them using the higher scope.
How the dhcp lease period works:
http://technet.microsoft.com/en-us/library/cc958908.aspx
http://technet.microsoft.com/en-us/library/cc780760(WS.10).aspx
http://technet.microsoft.com/en-us/library/cc958892.aspx