When an error occurs on a path a specified number of times within a specified interval, the error monitoring will finish and the path is determined to have an intermittent error, upon which the path is removed from those subject to automatic failbacks. The path that is removed will remain in the error status until the online operation is performed. However, if the path satisfies certain conditions (see Figure 1), it is automatically changed to the Online status.
The figure below shows the action taken when an intermittent error is assumed to have occurred on the path. For this example, the path is determined to have an intermittent error when the error occurs 3 or more times within 30 minutes. The events that occur are described by using the time arrows.
