D-Link DES-3326S manual Locking a Port’s MAC Address Learning, 204

DES-3326S Layer 3 Fast Ethernet Switch User’s Guide

Use the State<Enabled> pull-down menu to either enable or disable a given port.

Use the Speed/Duplex<Auto> pull-down menu to either select the speed and duplex/half-duplex state of the port. Auto – auto-negotiation between 10 and 100 Mbps devices, full- or half-duplex. The Auto setting allows the port to automatically determine the fastest settings the device the port is connected to can handle, and then to use those settings. The other options are 100M/Full, 100M/Half, 10M/Full, and 10M/Half. There is no automatic adjustment of port settings with any option other than Auto.

Locking a Port’s MAC Address Learning

A given port’s (or a range of port’s) 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.

The following fields can be set:

ParameterDescription

State <Enabled> Toggle the State <Enabled> field to either enable or disable a given port.

Speed/Duplex Toggle the Speed/Duplex <Auto> field

<Auto>to either select the speed and duplex/half-duplex state of the port. Auto – auto-negotiation between 10

204 Web-Based Switch Management