FW 07.00.00/HAFM SW 08.06.00 McDATA Intrepid 6064 Director Installation and Service Manual (620-000108-920, April 2005)

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Intrepid® 6064 Director Installation and Service Manual
Installation Tasks
• To disable OpenTrunking, click the Enable OpenTrunking check
box to remove the check mark, then click Activate to enable the
change and close the dialog box.
5. For each director port:
a. Click the check box in the Use Algorithmic Threshold column. A
check mark appears in the box and a calculated default value
appears (1% to 99%) in the associated field in the Threshold %
column. If the default is enabled, a value cannot be entered in
the Threshold % column.
b. Ensure the check box in the Use Algorithmic Threshold column
is blank. At the associated field in the Threshold % column,
type a percentage value from 1% to 99%.
NOTE: The default congestion threshold is calculated by the director
firmware.
6. Click the Unresolved Congestion check box to add a check mark
and enable the parameter. When this parameter is enabled,
unresolved congestion events are recorded in the event log, and
SNMP trap messages are generated and transmitted (if SNMP is
configured).
An unresolved congestion event occurs for a low-BB_Credit ISL
when the director rerouting algorithm cannot route data flow to
an alternate path (because doing so would exceed the alternate
path low BB_Credit threshold).
7. Click the Backpressure check box to add a check mark and enable
the parameter. When this parameter is enabled, backpressure
events are recorded in the event log, and SNMP trap messages are
generated and transmitted (if SNMP is configured).
A backpressure event occurs when the percent time an ISL has
low BB_Credit exceeds the low BB_Credit threshold.
8. The low BB_Credit threshold is the percent time an ISL is allowed
to not transmit data because BB_Credit is unavailable. When the
threshold is exceeded, data is rerouted to another ISL. In addition,
traffic cannot be rerouted to another low- threshold ISL. Use one
of the following to set the low BB_Credit threshold: