System information

DGS-3000 Series Layer 2 Managed Gigabit Switch Web UI Reference Guide
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stop period. This doubling of time for stopping these packets will continue until the maximum time has been
reached, which is 320 seconds and every stop from this point until a return to normal ingress flow would be 320
seconds. For a better understanding, please examine the following example of the Safeguard Engine.
Figure 8-76 Safeguard Engine Checking Interval Example
For every consecutive checking interval that reveals the high CPU utilization issue, the Switch will double the time
to enter the Exhausted mode to limit the specified traffic to the Switch. In the example above, the Switch doubled
the time in the Exhausted mode when consecutive high CPU utilization issues were detected at 5-second intervals.
(First stop = 5 seconds, second stop = 10 seconds, third stop = 20 seconds) Once the CPU utilization is below the
Falling Threshold, the wait period for the Exhausted mode will return to 5 seconds and the process will resume.
In Fuzzy mode, once the Safeguard Engine has entered the Exhausted mode, the Safeguard Engine will decrease
the packet flow to the Switch by half. After returning to Normal mode, the packet flow will be increased by 25%. The
switch will then return to its interval checking and dynamically adjust the packet flow to avoid overload of the Switch.
Users can enable the Safeguard Engine or configure advanced Safeguard Engine settings for the Switch.
To view this window, click Security > Safeguard Engine Settings as shown below:
Figure 8-77 Safeguard Engine Settings window
The fields that can be configured are described below:
Parameter Description
Safeguard Engine
State
Use the radio button to globally enable or disable Safeguard Engine settings for the
Switch.