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edge switch 2/16 service manual 2–15
Diagnostics
Link interface incident - bit-error threshold exceeded.
Link failure - loss of signal or loss of synchronization.
Link failure - not-operational primitive sequence (NOS) received.
Link failure - primitive sequence timeout.
Link failure - invalid primitive sequence received for the current link state.
Did one of the listed messages appear in the Link Incident Log?
YES NO
↓
The switch appears operational.
A link incident problem is indicated. Go to step 23 to obtain event codes. If no event
codes are found, go to "
MAP 0600: Port Failure and Link Incident Analysis
" on page 2-63.
23
Obtain event codes from the switch Event Log.
NOTE: If multiple event codes are found, note all codes and associated severity levels. Record
the date, time, and listed sequence, and determine if the codes are related to the reported
problem. Begin fault isolation with the most recent event code with the highest severity level.
Other codes may accompany this event code, or may indicate a normal indication after a
problem is recovered.
a. At the Hardware View, select Event Log from the Logs menu on the navigation
control panel. The Event Log displays.
b. Record the event code, date, time, and severity (Informational, Minor, Major, or
Severe).
c. Record all event codes that may relate to the reported problem.
Were one or more event codes found?
NO YES
↓
Go to Table 2–3 on page 2-2.
Return to the MAP step that sent you here.