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Ruling out cabling issues, Nx_port (host or storage) issues – HP StorageWorks MSA 2.8 SAN Switch User Manual

Page 236

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Troubleshooting

236

Fabric OS Procedures Version 3.1.x/4.1.x User Guide

6. Check the results of the loopback test and proceed as follows:

— If the loopback test failed, the port is bad. Replace the port card.

— If the loopback test did not fail, the SFP was bad.

Ruling Out Cabling Issues

7. Begin by performing the steps in “

Isolating the Areas

” on page 235.

By now an SFP problem is ruled out.

8. Insert a new cable into the suspected marginal port.

9. Enter

the portErrShow

command to determine if a problem still exists.

— If the

portErrShow

output displays a normal number of generated

errors, the issue is solved.

— If the

portErrShow

output still displays a high number of generated

errors, move on to “

Nx_Port (Host or Storage) Issues

” on page 236.

Nx_Port (Host or Storage) Issues

10. Begin performing the steps in

Isolating the Areas

on page 235 and “

Ruling

Out Cabling Issues

” on page 236.

By now an SFP problem and a cable problem have been ruled out.

11. Follow the troubleshooting procedures for the host or storage device.