Assume a financial customer purchased multiple Huawei OceanStor Dorado 18000 storage devices to carry service...

Fibre Channel (FC) link exceptions in Huawei OceanStor Dorado 18000 systems are addressed in the *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)*: “Common causes of FC link exceptions include mismatched port rates between the host and switch, poorly connected or faulty optical fibers, and mismatched optical module rates between host and storage front-end ports.” Let’s evaluate:

- Option A: Correct. Mismatched FC port rates between the host and switch cause link failures.

- Option B: Correct. Faulty or loose optical fibers disrupt FC connectivity.

- Option C: Correct. Mismatched optical module rates between host and storage ports lead to link exceptions.

- Option D: Incorrect. IP address settings are relevant to iSCSI, not FC, which uses physical connections.

Thus, options A, B, and C are possible causes.