350-601 Storage Network Practice Question
A Cisco MDS switch is configured in NPV mode. A host connected to this switch fails to log into the SAN. Which command should be used to verify the host's FLOGI status?
⚠ Common exam trap
Cisco often tests the distinction between NPV mode and standard switch mode, where candidates mistakenly use 'show flogi database' without the module parameter, not realizing that NPV switches require the module keyword to display FLOGI entries.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
show flogi database module <module>
In NPV mode, the MDS switch acts as a passthrough and does not maintain its own FLOGI database; instead, it forwards FLOGI requests to the upstream NPIV-capable switch. The 'show flogi database module <module>' command is used on the NPV switch to verify the host's FLOGI status because it displays the FLOGI entries learned from the upstream switch for the specific module where the host is connected, which is essential for troubleshooting login failures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
show zone
Why it's wrong here
This shows zone configuration, not FLOGI status.
- ✗
show fcns database
Why it's wrong here
The FC Name Server database shows all logged-in devices, but does not show FLOGI status directly.
- ✓
show flogi database module <module>
Why this is correct
This command shows FLOGIs on a specific module, which is more precise when troubleshooting a host on a known module.
- ✗
show flogi database
Why it's wrong here
This command shows all FLOGIs, but in NPV mode, the database is per module, so it may not highlight the specific host.
- ✗
show port-channel summary
Why it's wrong here
This shows port channel information, not FLOGI.
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