D-Link xStack Reference Manual page 277

xStack® DGS-3120 Series Layer 2 Stackable Managed Switch Web UI Reference Guide
The fields that can be configured are described below:
Parameter
Safeguard Engine State
Rising Threshold (20% -
100%)
Falling Threshold (20% -
100%)
Trap / Log
Mode
Click the Apply button to accept the changes made.
Figure 8-72 Safeguard Engine Settings window
Description
Use the radio button to globally enable or disable Safeguard Engine settings for the
Switch.
Used to configure the acceptable level of CPU utilization before the Safeguard Engine
mechanism is enabled. Once the CPU utilization reaches this percentage level, the
Switch will move into Exhausted mode, based on the parameters provided in this
window.
Used to configure the acceptable level of CPU utilization as a percentage, where the
Switch leaves the Safeguard Engine state and returns to normal mode.
Use the pull-down menu to enable or disable the sending of messages to the device's
SNMP agent and switch log once the Safeguard Engine has been activated by a high
CPU utilization rate.
Used to select the type of Safeguard Engine to be activated by the Switch when the
CPU utilization reaches a high rate. The user may select:
Fuzzy – If selected, this function will instruct the Switch to minimize the IP and ARP
traffic flow to the CPU by dynamically allotting an even bandwidth to all traffic flows.
Strict – If selected, this function will stop accepting all ARP packets not intended for the
Switch, and will stop receiving all unnecessary broadcast IP packets, until the storm
has subsided.
The default setting is Fuzzy mode.
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