Basic Management Tasks
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Instruction Manual - NXA-ENET8-POE+
Displaying CPU Utilization
Use the System > CPU Utilization page to display information on CPU utilization.
The following table displays the options on this page:
Perform the following steps to display CPU utilization:
1.
Click
System
>
CPU Utilization
.
2.
Change the update interval if required. Note that the interval is changed as soon as a new setting is selected.
Configuring CPU Guard
Use the System > CPU Guard page to set the CPU utilization high and low watermarks in percentage of CPU time utilized and the
CPU high and low thresholds in the number of packets being processed per second.
The following table displays the options on this page:
System - CPU Utilization Options
Time Interval
The interval at which to update the displayed utilization rate. (Options: 1, 5, 10, 30, 60 seconds;
Default: 1 second)
CPU Utilization
CPU utilization over specified interval
FIG. 44
Displaying CPU Utilization
System - CPU Guard Options
CPU Guard Status
Enables CPU Guard. (Default: Disabled)
High Watermark
If the percentage of CPU usage time is higher than the high-watermark, the switch stops packet
flow to the CPU (allowing it to catch up with packets already in the buffer) until usage time falls
below the low watermark. (Range: 40-100%; Default: 90%)
Low Watermark
If packet flow has been stopped after exceeding the high watermark, normal flow will be restored
after usage falls beneath the low watermark. (Range: 40-100%; Default: 70%)
Maximum Threshold
If the number of packets being processed by the CPU is higher than the maximum threshold, the
switch stops packet flow to the CPU (allowing it to catch up with packets already in the buffer) until
the number of packets being processed falls below the minimum threshold. (Range: 50-500 pps;
Default: 500 pps)
Minimum Threshold
If packet flow has been stopped after exceeding the maximum threshold, normal flow will be
restored after usage falls beneath the minimum threshold. (Range: 50-500 pps; Default: 50 pps)
Trap Status
If enabled, an alarm message will be generated when utilization exceeds the high watermark or
exceeds the maximum threshold. (Default: Disabled)
Once the high watermark is exceeded, utilization must drop beneath the low watermark before the
alarm is terminated, and then exceed the high watermark again before another alarm is triggered.
Once the maximum threshold is exceeded, utilization must drop beneath the minimum threshold
before the alarm is terminated, and then exceed the maximum threshold again before another
alarm is triggered.
Current Threshold
Shows the configured threshold in packets per second.