How to Configure & Activate SAP TMS Backup Domain Controller

Configuring the Backup Domain Controller

Prerequisites
In your transport domain, the SAP System that is configured as the domain controller is of special significance. If this SAP System fails, you cannot make changes to the TMS configuration during this time. Therefore if your transport domain contains more than three SAP Systems, we recommend configuring a backup domain controller. If your domain controller fails, the backup controller can assume the function of the domain controller.

Procedure
To configure a backup domain controller:

1. Log onto the SAP System functioning as the transport domain controller.
2. Enter Transaction STMS.
3. Choose Overview > Systems. The system overview appears.
4. Position the cursor on the domain controller.
5. Choose SAP System > Change. The brings you to the screen Change TMS Configuration: System <SID>.
6. In the field Backup, enter the SAP System you want to use as the backup controller of your transport domain.
7. Save your entries and distribute the configuration change.

Note:
• The SAP System that you want to use as the backup controller must have the same release version as the domain controller. Otherwise, configuration information may be lost when changing the transport domain controller.

Activating the Backup Domain Controller

Prerequisites
If your domain controller failed and you have to make changes to the TMS configuration, you can activate the backup controller.

Procedure
To activate the backup domain controller:

1. Log on to the SAP System functioning as the backup domain controller.
2. Enter Transaction STMS.
3. Choose Overview > Systems. The system overview appears.
4. Choose Extras > Activate backup controller.
5. Confirm the prompt.

Result
The backup domain controller is activated as the transport domain controller. The configuration change is distributed to all SAP Systems in the transport domain. The status bar indicates SAP System in which the configuration is being adjusted.

Note:
• When you have activated the backup domain controller, the "old" domain controller is automatically made the "new" backup controller, if it can be accessed.
• As long as the information that the domain controller has changed cannot be distributed to all the SAP Systems of the transport domain, the system overview of the new controller shows that the backup controller activation is still incomplete. You can only change the transport domain configuration if the backup controller is completely activated.