Red Hat DIRECTORY SERVER 7.1 - ADMINISTRATOR Administrator's Manual page 108

Creating and Maintaining Database Links
• Loop detection — This control keeps track of the number of times the server
chains with another server. When the count reaches a number you configure,
a loop is detected, and the client application is notified. For more information
about using this control, refer to "Detecting Loops," on page 135.
NOTE
The following sections describe how to alter the controls that the database link
forwards using the Console and from the command-line.
Chaining LDAP Controls Using the Console
In the Directory Server Console, select the Configuration tab.
1.
Expand the Data folder in the left pane, and click Database Link Settings.
2.
Select the Settings tab in the right window. To add an LDAP control to the list,
3.
click Add.
The "Select control OIDs to add" dialog box displays. Select the OID of a
control you want to add to the list, and click OK.
To delete a control from the list, select it from the "LDAP controls forwarded
4.
to the remote server" list, and click Delete.
After making modifications to the components list, a red dot appears on the
5.
tab, and the components field name turns gray. Click Save to save your
changes.
Chaining LDAP Controls from the Command-Line
You can alter the controls that the database link forwards by changing the
nsTransmittedControls
cn=plugins,cn=config
control, you add the following to your database link entry in the configuration
file:
nsTransmittedControls: 2.16.840.1.113730.3.4.9
In addition, if clients of your Directory Server create their own controls and you
want their operations to be chained to remote servers, you need to add the OID of
the custom control to the
The LDAP controls you can chain and their OIDs are listed in the following table:
108 Red Hat Directory Server Administrator's Guide • May 2005
Server side sorting and VLV controls are supported only when a
client application request is made to a single database. Database
links cannot support these controls when a client application makes
a request to multiple databases.
attribute of the
entry. For example, to forward the virtual list view
nsTransmittedControls
cn=config,cn=chaining database,
attribute.