Brocade Network Advisor SAN User Manual v12.0.0 (53-1002696-01, April 2013)

Brocade Network Advisor SAN User Manual 925

53-1002696-01

Bottleneck detection

FIGURE 401Bottlenecks dialog box

2. Select Enable if it is not already selected.

3. Select the Congestion Alerts check box to enable alerts for congestion bottlenecks. Clear this

check box to disable alerts. If you enabled alerts, enter threshold values (1-100%), or use the

default value for triggering a congestion alert.

4. Select the Latency Alerts check box to enable alerts for latency bottlenecks. If you enabled

alerts, enter values for the following thresholds:

• Threshold - enter values from 1-100%, 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 latency bottleneck

and trigger a latency alert. Values are in tenths of a second from 0 to 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 to 1000. This specifies the factor

that throughput must drop in a second (sub-second severity) for that second to be

considered affected by 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 to

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 to 31556926 (approximately 1 year).