350-601 Storage Network Practice Question
A storage administrator is troubleshooting a Fibre Channel SAN where initiators cannot log in to a target. The administrator verifies that the VSAN is configured correctly and that zoning is in place. Which two additional checks should be performed to resolve the issue?
⚠ Common exam trap
Cisco often tests the distinction between fabric-level login issues (like FCID persistence or port security) and storage-level issues (like LUN masking), leading candidates to incorrectly select LUN masking as a cause of login failure.
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
✓
Confirm that FCID persistence is not enabled with invalid static FCIDs.
In a Fibre Channel SAN, FCID persistence assigns a specific FCID to a device each time it logs in. If an invalid static FCID is configured (e.g., an FCID that conflicts with another device or is outside the allowed range), the initiator may fail to log in because the switch cannot assign the requested address. This is a common cause of login failures even when VSAN and zoning are correctly configured.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Ensure NPIV is enabled on the F-port.
Why it's wrong here
NPIV is for multiple virtual initiators, not required for basic single initiator login.
- ✓
Confirm that FCID persistence is not enabled with invalid static FCIDs.
Why this is correct
Invalid static FCID persistence can cause login failures if the FCID is already in use or conflicting.
- ✓
Verify that port security is not blocking the initiator WWPN.
Why this is correct
Port security can prevent login if the WWPN is not in the allowed list.
- ✗
Verify the FCoE VLAN ID matches on both ends.
Why it's wrong here
This applies only to FCoE, not native FC.
- ✗
Check that LUN masking has been applied on the target.
Why it's wrong here
LUN masking is applied after successful login, so it does not prevent login itself.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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