D-Link DGS-3700-12 User Manual page 250

DGS-3700-12/DGS-3700-12G Series Layer 2 Gigabit Ethernet User Manual
Figure 8- 60 Mapping QoS on the Switch
For every consecutive checking interval that reveals a packet flooding issue, the Switch will double the time it will
accept a few 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 limiting 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.
To view this window, click Security > Safeguard Engine Settings, as shown below:
Figure 8- 61 Safeguard Engine Settings window
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