Allied-telesis AT-8326GB Manuel d'utilisateur télécharger pdf (Page 35)

AT-8326GB Installation Guide

Port Security The AT-8326GB Gigabit Ethernet switch has three levels of port security:

Normal (default), Limited, and Secure. You can use the port security

levels to enhance the security to your network. The security levels are

briefly described below. For further information and instructions on

activating a security level, refer to the AT-S41 Management Software

User’s Guide.

Normal

This is the default port security setting and indicates that port security

has been disabled.

Limited

You use this security level to manually specify the maximum number of

dynamic MAC addresses a port on the switch can learn. Once a port has

learned its maximum limit of MAC addresses, it will discard any frames

that it receives with a source MAC address not already learned and

stored in the MAC address table.

This security level can prevent unauthorized individuals from

connecting to your network and gaining access to network resources.

For example, if an AT-8326GB port is connected to an Ethernet hub with

four workstations attached, you can configure the switch port to learn

only four MAC addresses. Once those addresses are learned, any one

else attempting to connect to the network through the Ethernet hub

would be denied access.

Secure

This security level causes the switch to immediately stop learning new

dynamic MAC addresses. The switch forwards frames based on the

dynamic MAC addresses that it has already learned and any static MAC

addresses that the network administrator has entered.

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Allied-telesis AT-8326GB Manuel d'utilisateur Page 35