jaedenone
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When modifying DHCP scope to make a change to DNS servers, will AD users get the new changes when they log off and back on to their systems?
Our DHCP scope lease time is set for 24 hours. I am working on a project which requires me to point all DNS settings for our users to a new DNS server. I plan to have the DHCP change user’s DNS settings to point to a different DNS server once I make the modification in the DHCP scope. I plan to make the change on a Friday after business hours, so that when users come back Monday, they will have the new DNS settings. My question is if I change the DNS, and if I use my workstation to test it by rebooting my workstation shortly after the change, would it pick up the new DNS settings even though the lease time in DHCP is set for 24 hours? After making the change in DHCP, do I need to enforce anything or should the change take affect instantaneously? Once I make this change, I need to test it, so will rebooting my system after the change take effect instantaneously?
ASKER
Just to confirm, If users reboot there machine, there IP address will remain the same, but there DNS will change right? I don't care if IP remains the same, but just so long as there DNS change after they log off and back on or reboot, when after I make my changes for DNS on the DHCP scope. I understand that there IP address will remain the same because there is a 24 hr lease we put on that, but that is fine. Can you confirm?
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IP addressing information is leased to a client, and the client is responsible for renewing the lease. By default, DHCP clients try to renew their lease when 50 percent of the lease time has expired. To renew its lease, a DHCP client sends a DHCPRequest message to the DHCP server from which it originally obtained the lease.
http://technet.microsoft.com/en-us/library/cc958935.aspx
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