C H A P T E R 5 Using Local Management
Configure Port Security
Local Management
LOCATION
Main Menu
Configure Device
Forwarding and Filtering
Configure Port Security
Description
Port security prevents unauthorized access of a port by “securing” a list of specific MAC addresses to a port. If the switch sees a MAC address that is not on the secured list, it discards the traffic. When port security is active, the switch forwards traffic from a single static address automatically learned by the switch, or from a list of static MAC addresses defined by the administrator.
NOTE
When you set port security to Disable, you must manually place static MAC addresses into the forwarding table. Only traffic from these static MAC addresses go through the port. Other traffic is dropped, and the port is still enabled.
When you set port security to Single, the first MAC address to hit that port is automatically placed into the forwarding table. Traffic from any other MAC ad- dress disabled the port.
To set port security from Local Management
1On the Configure Device screen, select Forwarding and Filtering.
2Select Configure Port Security from this menu.
Then choose one of the following options.
Option 1 - Automatically use the first MAC address seen on the port: The switch remembers the first MAC address seen on the port and accepts traffic only from that MAC address. The secured port will not learn any new MAC addresses.
1To set the switch to use the first MAC address seen on the port you are securing, in the MAC Learning column, press zuntil <Single> displays.
2ClickSubmit.
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