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

D-Link DGS-3324SRi Intelligent Stackable Gigabit Ethernet Switch
Figure 4- 24. 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 Fail 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 stack) you want to configure.
Broadcast Storm, Multicast Storm and Destination Lookup Fail 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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