D-Link DGS-3627G Product Manual - Page 411

xStack® DGS-3600 Series Layer 3 Managed Gigabit Ethernet Switch NOTICE: When Safeguard Engine is enabled, the Switch will allot bandwidth to various traffic flows (ARP, IP) using the FFP (Fast Filter Processor) metering table to control the CPU utilization and limit traffic. This may limit the speed of routing traffic over the network. Safeguard Engine Settings To window is used to enable Safeguard Engine or configure advanced Safeguard Engine settings for the Switch. To configure the Safeguard Engine settings, click Security > Safeguard Engine > Safeguard Engine Settings, as shown below:, Figure 7- 62. Safeguard Engine Settings window To enable the Safeguard Engine option, select Enabled with the drop-down State menu and click the Apply button. To configure the advanced settings for Safeguard Engine, click the CPU Utilization Settings button to view the following window. Figure 7- 63. Safeguard Engine Settings window To configure the following parameters: Parameter Description State Rising Threshold (20%-100%) Falling Threshold (20%-100%) Trap/Log Mode Use the pull-down menu 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 Safeguard Engine state, 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. 395