D-Link DES-3018 User Manual page 147

DES-3010F/DES-3010FL/DES-3010G/DES-3016/DES-3018/DES-3026 Fast Ethernet Switch Manual
Figure 10- 1. Traffic Control Settings window
The Switch will also scan and monitor packets coming into the Switch by monitoring the Switch's chip
counter. This method is only viable for Broadcast and Multicast storms because the chip only has counters
for these two types of packets. Once a storm has been detected (that is, once the packet threshold set below
has been exceeded), the Switch will shutdown the port to all incoming traffic with the exception of STP
BPDU packets, for a time period specified using the Count Down field. Although the Count Down field can
be specified, users are advised to disable this feature and assess the situation before recovering the port. The
Count Down field may be disabled by entering a value of 0 (zero).
If this field times out and the packet storm continues, the port will be placed in a Shutdown Forever mode
which will produce a warning message to be sent to the Trap Receiver. Once in Shutdown Forever mode, the
user may recover the affected ports by using the Traffic Control Recover section of the previous window
and recover the ports shutdown forever. To utilize this method of Storm Control, choose the Shutdown
option of the Action field in the window below.
Use the Traffic Control menu to enable or disable storm control and adjust the threshold for multicast and
broadcast storms, as well as any unknown storms. To view the window above, click Security > Traffic
Control:
To configure Traffic Control, enable or disable the Broadcast Storm, Multicast Storm and Unknown
Unicast Storm using their corresponding pull-down menus. Click Apply to implement changes made.
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