How to detect service group failover
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:
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Service Group Fault for the node on which the service group was online and faulted
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Service Group Offline for the node on which the service group faulted
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Service Group Online for the node to which the service group failed over.