Implementing Cisco Storage Area Networking (DCSAN) — Question 2

A storage administrator is upgrading Cisco NX-OS on a Cisco MDS switch. The administrator performs an ISSU upgrade following the configuration guide. While the install is proceeding, the administrator connects a new server to the switch, which cannot access storage. The existing servers continue to operate properly through the switch. Why is the new server failing to connect?

Answer options

• A. The fabric data plane resets as part of the upgrade process.
• B. The new server is unable to log in to the fabric to receive an FC-ID.
• C. The upgrade process disables any currently unused ports.
• D. The zoning database is locked during the upgrade process.

Correct answer: D

Explanation

The correct answer is D because during an upgrade, the zoning database is locked, preventing new devices from logging in and accessing the fabric. Option A is incorrect as the fabric data plane does not reset during an ISSU upgrade. Option B is also wrong since the new server cannot log in because it cannot access the zoning information while it is locked. Option C is not the reason in this context, as unused ports being disabled does not impact the new server's ability to connect if zoning were available.