Running SAP in a high availability cluster environment needs additional interfaces to communicate between the SAP program sapstartsrv and the high availability cluster. At least it is essential to inform the cluster, if a SAP instance is started or shutdown. This article describes the reference interface implementation sap_suse_cluster_connector
See my Blog http://scn.sap.com/community/business-continuity/blog/2014/05/08/using-sapvendorclusterconnector-for-interaction-between-cluster-framework-and-sapstartsrv for details.
The SCN document Manual Page of sap_vendor_cluster_connector is intended as a manual page for the script connector to be shipped by the HA solution vendor.
The following diagram shows a sample cluster integration using the SUSE Linux Enterprise High Availability Extension:
The older / legacy documentation in (PDF) format.