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DGS-3700-12/DGS-3700-12G Series Layer 2 Gigabit Ethernet Switch User Manual
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Figure 5 - 1 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 as shown below:
Figure 5 - 2 Safeguard Engine window
To configure the Switch’s Safeguard Engine, change the State to Enabled when the Safeguard Engine is enabled a
green light will show on the gray bar at the top of this window, next to Safeguard. To set the Safeguard Engine for the
Switch, complete the following fields: