Setting Windows DHCP Lease Times - BlueCat Address Manager - 9.0.0

Address Manager Administration Guide

BlueCat Address Manager

How to set the Windows DHCP lease time.

The default lease time on a Windows DHCP server is eight (8) days. If you deploy a configuration with DHCP data without setting the Default Lease Time deployment option, the lease time associated with DHCP scopes is not modified.

To set the lease time in Address Manager:

  1. Select the level at which you want to set the lease time.
  2. Click the Deployment Options tab.
  3. Click New, then select DHCP Service Option. The Add DHCP Service Deployment Option page opens.
  4. From the Options drop-down menu, select Default Lease Time.
  5. In the Length of Time field, enter a value. From the drop–down menu, select a unit of time (Seconds, Minutes, Hours, or Days).
  6. Under Servers, determine the servers to which this option applies:
    • To apply the option to all servers in the configuration select All Servers.
      Attention: Server Groups only support BlueCat DNS/DHCP Servers.
    • To apply the option to a specific server select Specific Server, and then select a server from the drop-down list.
  7. Click Add to assign the option.
    Note: To set an Unlimited duration, set the maximum value (4,294,967,295 seconds) at the Default Lease time option.
    Note: When a Windows DHCP lease expires, Windows does not notify Address Manager of the expiry. After Windows deletes the expired lease, Windows notifies Address Manager of the change and Address Manager deletes the lease in its database and in the Address Manager user interface. The result is that the lease information shown in Address Manager may be slightly behind actual conditions on the Windows server. That is, expired DHCP leases may not be reported to Address Manager until several minutes after the lease expires.