D-Link DES-3028 User Manual page 59

DES-3028 DES-3028P DES-3052 DES-3052P Layer 2 Fast Ethernet Managed Switch
Figure 6- 24. Safeguard Engine example
For every consecutive checking interval that reveals a packet flooding issue, the Switch will double the time it will discard ingress
ARP and IP broadcast packets. In the example above, the Switch doubled the time for dropping ARP and IP broadcast packets
when consecutive flooding issues were detected at 5 second intervals. (First stop = 5 seconds, second stop = 10 seconds, third stop
= 20 seconds) Once the flooding is no longer detected, the wait period for dropping ARP and IP broadcast packets will return to 5
seconds and the process will resume.
Once in Exhausted mode, the packet flow will decrease by half of the level that caused the Switch to enter Exhausted mode. After
the packet flow has stabilized, the rate will initially increase by 25% and then return to a normal packet flow.
NOTE: While in Exhausted mode, only trusted IP addresses are accepted to connect to the Switch.
To configure the Safeguard Engine for the Switch, click Security > Safeguard Engine which will open the following window.
Figure 6- 25. Safeguard Engine Settings window
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