Adding or removing scopes from an MS DHCP failover relationship - User Guide - BlueCat Horizon

BlueCat Horizon User Guide

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BlueCat Horizon

Failover relationships will initially appear as Empty and must be activated by adding a scope to the relationship from the IPAM page. You can either create a new scope or select an existing one. If the failover relationship was previously empty, it will be created on the Microsoft DHCP server.

Microsoft DHCP scopes participating in failover relationships are grouped and labeled as such in the Authority column on the IPAM page. The Failover relationship column displays the name of the failover relationship to which the scope belongs.

Adding scopes to failover relationships

There are two ways to add scopes to a failover relationship in the DDI orchestrator application.

To add scopes to the relationship:

  1. On the IPAM page, locate and select the scope in the list.
  2. Use either the Action menu or the ellipses in the row to select Add scope to failover.
  3. In the dropdown, select a failover relationship to add the scope to.
    The Add scope to failover dialog.
  4. Select Confirm.

-OR-

  1. Create a new scope and select the failover relationship during creation.
    If the server is configured to be able to use a failover relationship, there is a Failover step in the Create DHCP scope dialog, in which you can select a failover relationship from the dropdown.

If the failover relationship was empty before the scope was added to it, the status will change from Empty to Normal.


The State column in the list on the Manage failover dialog displays a Normal status when a scope has been added to that failover relationship. A failover relationship without a scope is displayed as Empty.

Removing scopes from failover relationships

There are two ways to remove scopes from failover relationships in the DDI orchestrator application.

To remove a scope from a failover relationship:

  1. Locate the specific scope on the IPAM page.
  2. Use either the Action menu or the ellipses in the row to select Remove from failover.
    The Remove from failover dialog.

After the scope is removed from the failover relationship, decide whether to delete or disable the secondary scope.

-OR-

  • Locate the specific scope in the list on the IPAM page.
  • Use either the Action menu or the ellipses in the row to select Manage scope instances.
  • In the dialog, use the ellipses in the row for the relevant server to select Remove scope instance.
    The Remove scope instance option in the Manage scopes dialog for a DHCP scope.
  • Select Save.