VCS does not send any explicit traps when a failover occurs in response to a service group fault. When a service group faults, VCS generates the following notifications if the AutoFailOver attribute for the service group is set to 1:
Service Group Fault for the node on which the service group was online and faulted
Service Group Offline for the node on which the service group faulted
Service Group Online for the node to which the service group failed over