What happens when a link failure occurs

ONTAP monitors a link’s usage periodically. The ONTAP response to a link failure differs depending on where the failure occurs.

The following table shows what occurs if there is a failure in a fabric-attached configuration:

If a failure occurs in the link between the... Then...
ONTAP system and the switch ONTAP receives notification immediately and sends traffic to the other path immediately.
Switch and the storage array ONTAP is not immediately aware that there is a link failure because the link is still established between the ONTAP system and the switch. ONTAP becomes aware that there is a failure when the I/O times out. ONTAP retries three times to send the traffic on the original path, then it fails over the traffic to the other path.