After upgrading Oracle Grid Infrastructure, update the Enterprise Manager Agent Base Directory on each cluster member node running an agent.
The Agent Base directory is a directory where the Management Agent home is created. The Management Agent home is in the path Agent_Base_Directory/core/EMAgent_Version. For example, if the Agent Base directory is /u01/app/emagent, then the Management Agent home is created as /u01/app/emagent/core/13.1.1.0.
Navigate to the bin directory in the Management Agent home.
In the /u01/app/emagent/core/13.1.1.0/bin directory, open the file emctl with a text editor.
Locate the parameter CRS_HOME, and update the parameter to the new Grid home path.
Repeat steps 1-3 on each node of the cluster with an Enterprise Manager agent.