To initiate an incremental topology split:

  1. Configure the Topology Split Manager as follows:

    • Enable topology split

      Set the NumberOfDomains configuration parameter to the number of domains that are specified in the TSM_BASEDIR/smarts/local/conf/discovery/topo-split/ topo-split.conf file. That number must be greater than 1.

      • Select normal mode

        Ensure that the IsTrialLearningEnabled configuration parameter is FALSE.

      • Select incremental topology split

        Ensure that the IsSplitFromScratch configuration parameter is FALSE.

      • Optional but recommended: Enable automatic topology synchronization

        Set the IsTopoSyncEnabled configuration parameter to TRUE.

      • Optional but recommended: Enable edge management

        Set the EnableAutoEdgeManagement configuration parameter to TRUE. Note that automatic topology synchronization must be enabled before edge management can be enabled.

      • Enable the TSM hook script

        Set the IsTSMHookEnabled configuration parameter to TRUE.

  2. Enter the following command from TSM_BASEDIR/smarts/bin to invoke an incremental topology split:

                   dmctl -s <TSM name> invoke GA_Driver::TopoSplit-Driver start

  3. If IsTopoSyncEnabled is TRUE: For each IP Availability Manager, go to the BASEDIR/smarts/bin directory in the appropriate IP Manager installation area and enter the following command to invoke a pending discovery:

                   dmctl -s <AM name>   invoke ICF_TopologyManager::ICF-TopologyManager discoverPending
               dmctl -s AM001 invoke 
               
                 ICF_TopologyManager::ICF-TopologyManager discoverPending

  4. If IsTopoSyncEnabled is FALSE: For each IP Availability Manager, use the associated seed file in the Topology Split Manager’s local/logs directory to manually initiate a discovery at the IP Availability Manager. If the IP Availability Manager is on a different host, copy the associated seed file to that host and place it in the BASEDIR/smarts/local/conf directory.

  5. After the IP Availability Managers have completed their discoveries, check all critical numbers to determine if they meet your predefined criteria.