Configuring Port Security - D-Link DGS-3324SR User Manual

D-Link DGS-3324SR Layer 3 Stackable Gigabit Ethernet Switch
Figure 4- 25. Traffic Control Settings window
Traffic or storm control is used to stop broadcast, multicast or ARP request storms that may result when a loop is
created. The Destination Look Up Failure control is a method of shutting down a loop when a storm is formed
because a MAC address cannot be located in the Switch's forwarding database and it must send a packet to all
ports or all ports on a VLAN.
To configure Traffic Control, select the Unit (Unit ID of a switch in a switch) you want to configure. Broadcast
Storm, Multicast Storm and Destination Unknown may be Enabled or Disabled. The Threshold value is the
upper threshold at which the specified traffic control is switched on. This is the number of Broadcast, Multicast
or DLF packets, in Kbps, received by the switch that will trigger the storm traffic control measures. The
Threshold value can be set from 0 to 255 packets. The Default setting is 128.

Configuring Port Security

A given port's (or a range of ports') dynamic MAC address learning can be locked such that the current source
MAC addresses entered into the MAC address forwarding table can not be changed once the port lock is enabled.
The port can be locked by using the Learn <Disabled> pull-down menu to Enabled, and clicking Apply.
This is a security feature that prevents unauthorized computers (with source MAC addresses unknown to the
Switch prior to locking the port (or ports) from connecting to the Switch's locked ports and gaining access to the
network.
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