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5 – Diagnostics/Troubleshooting
POST Diagnostics
59021-05 A 5-7
5.1.2.2
Excessive Port Errors
The switch monitors a set of port errors and generates alarms based on
user-defined sample intervals and thresholds. Refer to the SANbox2-8c/16 Switch
Management User’s Guide for information about managing alarms. These port
errors include the following:
■ CRC errors
■ Decode errors
■ ISL connection count
■ Login errors
■ Logout errors
■ Loss-of-signal errors
If the count for any of these errors exceeds the rising threshold for three
consecutive sample intervals, the switch generates an alarm and disables the
affected port, changing its operational state to “down”. Port errors can be caused
by the following:
■ Thresholds are too low or the sample interval is too small
■ Faulty Fibre Channel port cable
■ Faulty SFP
■ Faulty port
■ Fault device or HBA
Review the alarm log to determine if excessive port errors are responsible for
disabling the port. Look for a message that mentions one of the monitored error
types indicating that the port has been disabled, then do the following:
1. Examine the alarm configuration for the associated error using the Show
Config Threshold command or the SANbox Manager application. Refer to
the ”Show Config Command” on page B-55. Refer to Table B-4 for a list of
the alarm configuration defaults. Are the thresholds and sample interval
correct?
■ Yes - Continue
■ No - Correct the alarm configuration. If the condition remains, continue.