Learn the crucial step of updating WWPNs on FC LIFs after replacing a defective NetApp FAS8300 controller that serves FC LUNs. Ensure proper SAN connectivity post-controller replacement.
Table of Contents
Question
Your customer has a defective FAS8300 controller serving FC LUNs.
In this scenario, which step is required after replacing the controller?
A. Call support to update the new node system ID.
B. Update the WWPNs on the FC LIFs.
C. Call support to update the new node’s serial number.
D. Update the node licenses.
Answer
B. Update the WWPNs on the FC LIFs.
Explanation
After replacing a defective FAS8300 controller that serves FC LUNs, the most important step is to update the World Wide Port Names (WWPNs) on the Fibre Channel (FC) logical interfaces (LIFs).
When an FAS8300 controller is replaced, the new controller will have different WWPNs than the original. WWPNs are unique identifiers assigned to each FC port. FC LIFs on the controller use these WWPNs to establish connectivity with FC switches and hosts.
If the WWPNs are not updated on the FC LIFs after controller replacement, hosts will be unable to access the LUNs because they will still be trying to connect using the old WWPNs. Updating the FC LIF WWPNs to match the new controller’s WWPNs is critical to restore FC SAN connectivity.
The other options are not required in this scenario:
A) NetApp support does not need to be contacted to update the system ID, as this happens automatically.
C) The serial number is updated automatically and does not require contacting support.
D) Node licenses are not tied to the controller hardware and do not need updating after a controller replacement.
In summary, to ensure the FC SAN hosts can reconnect to their LUNs after a FAS8300 controller replacement, you must update the WWPNs on the FC LIFs to match the new controller’s port WWPNs. This is the key step to restore FC connectivity.
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