IBM SAN32M-2, Installation And Service Manual

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145 Chapter 3: Maintenance analysis procedures
21
Event codes 140 and 142 occur only if the optional OpenTrunking
feature is enabled.
• Event code 140 - OpenTrunking firmware detected an ISL with
Fibre Channel traffic that exceeds the configured congestion
threshold.
• Event code 142 - OpenTrunking firmware detected an ISL with
no transmission BB_Credit for a period of time that exceeded the
configured low BB_Credit threshold. This results in downstream
fabric congestion.
No action is required for an isolated event or if the reporting ISL
approaches 100% throughput. If the event persists, perform one of
the following:
• Relieve the congestion by adding parallel ISLs between the
fabric elements reporting the problem.
• Increase the ISL link speed between the fabric elements
reporting the problem (from 1 Gbps to 2 or 4 Gbps).
• Reroute Fibre Channel traffic by moving device connections to a
less-congested region of the fabric.
Was the maintenance action successful?
NO YES
↓
The fabric, ISL, and product are operational. Exit MAP.
Contact the next level of support. Exit MAP.
22
Event code 150 indicates a fabric merge process failed during ISL
initialization. An incompatible zone set was detected or a problem
occurred during delivery of a zone merge frame. This event code
always precedes event code
070 , and represents the reply of an
adjacent fabric element in response to a zone merge frame. Obtain
supplementary event data as follows:
a. At the Event Log , examine the first 12 bytes ( 0 through 11 ) of
event data.
b. Bytes 0 specifies the E_Port reporting the problem. Bytes 8
through 11 specify the failure reason as listed in Table 20 .