Brocade Network Advisor SAN User Manual v12.3.0 - Manual (Page 1156)

1104 Brocade Network Advisor SAN User Manual
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Bottleneck detection
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• Threshold - Enter values between 1 and 100, which is the percentage of one-second
intervals affected by congestion conditions within a specified time window that will trigger
a latency alert.
• Time Threshold - Enter the minimum fraction of a second (sub-second time) that must be
affected by latency in order for that second to be considered affected by a latency
bottleneck and trigger a latency alert. Values are in tenths of a second from 0 through 10
tenths, or 1 second. You can only configured Time Threshold for switches running Fabric
OS v7.1.0 and later.
• Severity Threshold - Enter a severity threshold from 1 through 1000. This specifies the
factor that throughput must drop in a second (sub-second severity) for that second to be
considered affected by a latency bottleneck and trigger a latency alert. You can only
configured Severity Threshold for switches running Fabric OS v7.1.0 and later.
NOTE
When setting time and severity threshold values the at switch level or fabric level, all values
applied to individual ports are overridden and updated with the new values.
5. Enter a value for Window in seconds over which the percentage of seconds affected by
bottleneck conditions is computed and compared with the threshold. Values can be from 1
through 10800 seconds (3 hours).
6. Enter a value for Quiet Time, which is the minimum number of seconds between consecutive
alerts. Enter values from 1 through 31556926 (approximately 1 year).
7. Select one or more fabrics, switches, or ports from the Products/Ports list.
You can select fabrics or switches or ports, but you cannot select a mix of fabrics, switches,
and ports.
8. Click the right arrow to apply the settings in the Bottleneck Detection pane to the selected
elements in the Products/Ports list.
If you selected one or more ports, a right arrow displays in the Direct Assigned column for
these ports, indicating that the alert parameters for the ports override the alert parameters for
the switch.
If you selected switches or fabrics, the alert parameters are changed for all of the eligible ports
in those switches and fabrics except for the ports that had been directly assigned alert
parameters previously.
9. Select the following options at the bottom of the dialog box as necessary:
- Show Bottleneck Graph. This displays the Bottleneck Graph Port Selector dialog box for
configuring a bottleneck graph. Refer to
“Displaying bottleneck statistics” on page 1105.
- Show Affected Devices. Lists the hosts and targets that might be affected by the selected
bottlenecked port.
- Inherit From Switch. Restores the switch bottleneck parameters to a port that has direct
assigned settings. Refer to
“Inheriting alert parameters from a switch” .
- Add Flow. Displays the Add Flow Definition dialog box to define flows for flow monitoring.
Applicable fields on the dialog box, such as source device and destination device IDs, will
be populated according to the port selected. Refer to
“Flow provisioning and monitoring”
on page 1814 for more information on using the Add Flow Definition dialog box and Flow
Vision features. The Add flow button is enabled when you select a single bottleneck or non
bottleneck port.