Below are the steps for recreating physical standby controlfile.

1. Get the controlfile location [STANDBY]

2. Cancel recovery [STANDBY]

3. Shutdown standby [ STANDBY]

4. Create standby controlfile in primary [ PRIMARY]

5. copy the controlfile to standby server.

6.Replace the existing controlfile with the new controlfile [ STANDBY]

7. Mount standby database [ STANDBY]

8. Start MRP recovery process [ STANDBY]